{
 "method": "Viewshed test of Polybius 3.54.2 and Livy 21.35.8 for each candidate col.\n\nPolybius 3.54.2: from the summit of the pass Hannibal \"pointed out to them the\nplains of the Po\" (ta peri ton Padon pedia) and the direction of Rome; Livy\n21.35.8: \"in promunturio quodam, unde longe ac late prospectus erat,\nconsistere iussis militibus Italiam ostentat subiectosque Alpinis montibus\nCircumpadanos campos\".\n\nTest: from the col itself, from points along the descent (every 250 m for the\nfirst 3 km, then every 1 km to 10 km), and from the nearest ground 100 m and\n300 m higher than the col within 2.5 km (a knoll a general could climb), and\nfrom every DEM cell within 1.5 km of the col that is 0-300 m above it\n(vantage scan, 3-cell stride), is any terrain of the Po plain in line of sight?\n\n  * DEM: Copernicus GLO-90 (surface model; 90 x 65 m cells at 45 N; modern\n    tree cover and buildings are in the surface, which can only hide plain\n    that would otherwise be visible, never create visibility).\n  * Rays: 0.25 deg azimuth steps (1440 rays), samples every 90 m to 120 km,\n    positions by the spherical direct geodesic, elevation by bilinear\n    interpolation.\n  * Earth curvature and standard refraction: effective height\n        z_eff = z - (1 - k) d^2 / (2 R),  k = 0.13, R = 6371.0088 km.\n  * Observer height 2 m above the DEM surface.\n  * \"Po plain\" target = DEM cells below 400 m, east of 7.3 E and north of\n    44.4 N (the Piedmont plain from Cuneo/Saluzzo to Ivrea and Vercelli; the\n    Ligurian hills and the upper Cuneo plateau, which lie above 400 m, are\n    excluded by the height rule).\n  * A ray sample is visible when its elevation angle from the observer is\n    >= the maximum elevation angle of all nearer samples on that ray.\n\nOutputs: data/viewshed_output.json, data/viewshed_output.md, and\ndata/viewshed_cells.json (coarse grid of visible-plain cells per col, for the\nfigure).  Usage: python3 viewshed.py\n",
 "params": {
  "az_step_deg": 0.25,
  "max_km": 120.0,
  "sample_m": 90.0,
  "k": 0.13,
  "observer_h_m": 2.0,
  "plain": {
   "z_below": 400.0,
   "lon_east_of": 7.3,
   "lat_north_of": 44.4
  }
 },
 "cols": {
  "Col du Mont-Cenis": {
   "geocoded": {
    "lat": 45.2598281,
    "lon": 6.9008841,
    "z_dem": 2087.6797203433,
    "source": "Nominatim/OSM node/2178653980 (yes)"
   },
   "saddle_dem_diagnostic": [
    45.259166666666665,
    6.901666666666667,
    2081.017578125
   ],
   "used": {
    "lat": 45.2598281,
    "lon": 6.9008841,
    "z_dem": 2087.6797203433
   },
   "col": {
    "z_obs": 2087.6797203433,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0
   },
   "descent_points": [
    {
     "z_obs": 2068.6182285702857,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.25,
     "lat": 45.25832,
     "lon": 6.90251
    },
    {
     "z_obs": 2055.022631132855,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.5,
     "lat": 45.25648,
     "lon": 6.90435
    },
    {
     "z_obs": 2052.86219132031,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.75,
     "lat": 45.25464,
     "lon": 6.90619
    },
    {
     "z_obs": 2038.2749802734663,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.0,
     "lat": 45.2528,
     "lon": 6.90803
    },
    {
     "z_obs": 1986.461637132792,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.25,
     "lat": 45.25096,
     "lon": 6.90987
    },
    {
     "z_obs": 1959.0,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.5,
     "lat": 45.24927,
     "lon": 6.91194
    },
    {
     "z_obs": 1959.0,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.75,
     "lat": 45.24772,
     "lon": 6.91425
    },
    {
     "z_obs": 1959.0,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.0,
     "lat": 45.24617,
     "lon": 6.91657
    },
    {
     "z_obs": 1959.0,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.25,
     "lat": 45.24463,
     "lon": 6.91889
    },
    {
     "z_obs": 1959.0,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.5,
     "lat": 45.24308,
     "lon": 6.92121
    },
    {
     "z_obs": 1959.0,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.75,
     "lat": 45.24154,
     "lon": 6.92353
    },
    {
     "z_obs": 1959.0,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 3.0,
     "lat": 45.23999,
     "lon": 6.92585
    },
    {
     "z_obs": 1959.0,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 4.0,
     "lat": 45.23381,
     "lon": 6.93512
    },
    {
     "z_obs": 1971.8881262811979,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 5.0,
     "lat": 45.22706,
     "lon": 6.94352
    },
    {
     "z_obs": 1913.3797092656503,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 6.0,
     "lat": 45.21924,
     "lon": 6.94968
    },
    {
     "z_obs": 1867.0082496386508,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 7.0,
     "lat": 45.21063,
     "lon": 6.95135
    },
    {
     "z_obs": 1855.560124023316,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 8.0,
     "lat": 45.2045,
     "lon": 6.96054
    },
    {
     "z_obs": 1826.8551410956625,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 9.0,
     "lat": 45.19843,
     "lon": 6.96991
    },
    {
     "z_obs": 1578.3226462343332,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 10.0,
     "lat": 45.19108,
     "lon": 6.97726
    }
   ],
   "first_descent_point_with_plain": null,
   "knoll_+100": {
    "z_obs": 2196.7224121093964,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0,
    "lat": 45.25833333333333,
    "lon": 6.8966666666666665,
    "z": 2196.722412109375,
    "dist_m": 369.8689669276304,
    "dz_target": 100
   },
   "knoll_+300": {
    "z_obs": 2393.5290527343145,
    "plain_visible": true,
    "frac_azimuths_plain_visible": 0.0020833333333333333,
    "n_visible_plain_samples": 25,
    "nearest_plain": {
     "km": 111.51,
     "azimuth": 124.75,
     "lat": 44.67998992008674,
     "lon": 8.05050747754231,
     "z": 272.5770117932061
    },
    "farthest_plain": {
     "km": 115.38,
     "azimuth": 124.5,
     "lat": 44.66342524961832,
     "lon": 8.094001821114155,
     "z": 398.2396889719123
    },
    "azimuth_range_with_plain": [
     124.5,
     125.0
    ],
    "lat": 45.2575,
    "lon": 6.8916666666666675,
    "z": 2393.529052734375,
    "dist_m": 767.1960520367536,
    "dz_target": 300
   },
   "vantage_scan": {
    "n_points": 61,
    "n_with_plain_visible": 3,
    "best": {
     "z_obs": 2382.5275878906614,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.004861111111111111,
     "n_visible_plain_samples": 134,
     "nearest_plain": {
      "km": 93.06,
      "azimuth": 123.75,
      "lat": 44.78165566065628,
      "lon": 7.877049896868486,
      "z": 332.13179510592005
     },
     "farthest_plain": {
      "km": 114.48,
      "azimuth": 124.25,
      "lat": 44.665112212998324,
      "lon": 8.093224330760105,
      "z": 387.69800814597215
     },
     "azimuth_range_with_plain": [
      123.0,
      124.5
     ],
     "lat": 45.25083333333333,
     "lon": 6.8966666666666665,
     "z": 2382.527587890625,
     "dist_m": 1052.8159215192752
    }
   }
  },
  "Col Clapier": {
   "geocoded": {
    "lat": 45.1681847,
    "lon": 6.9231775,
    "z_dem": 2478.5847341504273,
    "source": "Nominatim/OSM node/1409452160 (yes)"
   },
   "saddle_dem_diagnostic": [
    45.163333333333334,
    6.925000000000001,
    2366.88037109375
   ],
   "used": {
    "lat": 45.1681847,
    "lon": 6.9231775,
    "z_dem": 2478.5847341504273
   },
   "col": {
    "z_obs": 2478.5847341504273,
    "plain_visible": true,
    "frac_azimuths_plain_visible": 0.00625,
    "n_visible_plain_samples": 557,
    "nearest_plain": {
     "km": 79.56,
     "azimuth": 112.0,
     "lat": 44.89631494934795,
     "lon": 7.859690072823379,
     "z": 261.0068485169746
    },
    "farthest_plain": {
     "km": 119.97,
     "azimuth": 111.75,
     "lat": 44.759652234586866,
     "lon": 8.334521325357851,
     "z": 208.65582738342488
    },
    "azimuth_range_with_plain": [
     111.25,
     113.25
    ]
   },
   "descent_points": [
    {
     "z_obs": 2448.210952050841,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.25,
     "lat": 45.16729,
     "lon": 6.92605
    },
    {
     "z_obs": 2400.483515839831,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.5,
     "lat": 45.16621,
     "lon": 6.92885
    },
    {
     "z_obs": 2393.648804453194,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.75,
     "lat": 45.16514,
     "lon": 6.93165
    },
    {
     "z_obs": 2337.581409394504,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.04861111111111111,
     "n_visible_plain_samples": 12820,
     "nearest_plain": {
      "km": 29.52,
      "azimuth": 102.75,
      "lat": 45.104971738633814,
      "lon": 7.301350870566005,
      "z": 370.59315008375495
     },
     "farthest_plain": {
      "km": 119.97,
      "azimuth": 103.0,
      "lat": 44.91180305407049,
      "lon": 8.418994261702153,
      "z": 127.57607836253204
     },
     "azimuth_range_with_plain": [
      95.25,
      112.5
     ],
     "km_from_col": 1.0,
     "lat": 45.16415,
     "lon": 6.93449
    },
    {
     "z_obs": 2201.7873401405573,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.02013888888888889,
     "n_visible_plain_samples": 3775,
     "nearest_plain": {
      "km": 61.29,
      "azimuth": 106.25,
      "lat": 45.00728126734521,
      "lon": 7.686138769922544,
      "z": 239.07547843861502
     },
     "farthest_plain": {
      "km": 119.97,
      "azimuth": 105.25,
      "lat": 44.870735621879795,
      "lon": 8.406521796415483,
      "z": 108.9178360454657
     },
     "azimuth_range_with_plain": [
      104.0,
      111.0
     ],
     "km_from_col": 1.25,
     "lat": 45.16397,
     "lon": 6.93767
    },
    {
     "z_obs": 2087.3640162502334,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.5,
     "lat": 45.1638,
     "lon": 6.94084
    },
    {
     "z_obs": 2002.4493202267413,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.75,
     "lat": 45.16362,
     "lon": 6.94402
    },
    {
     "z_obs": 1948.2316424220849,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.0,
     "lat": 45.16344,
     "lon": 6.9472
    },
    {
     "z_obs": 1894.458947000067,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.25,
     "lat": 45.16279,
     "lon": 6.95011
    },
    {
     "z_obs": 1758.150534261851,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.5,
     "lat": 45.16138,
     "lon": 6.95259
    },
    {
     "z_obs": 1751.3910063748015,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.75,
     "lat": 45.15996,
     "lon": 6.95507
    },
    {
     "z_obs": 1647.188569193158,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 3.0,
     "lat": 45.15857,
     "lon": 6.95757
    },
    {
     "z_obs": 1675.3960384375014,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 4.0,
     "lat": 45.15166,
     "lon": 6.96515
    },
    {
     "z_obs": 1513.1121722658404,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 5.0,
     "lat": 45.1454,
     "lon": 6.97298
    },
    {
     "z_obs": 1415.1655680664248,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.013194444444444444,
     "n_visible_plain_samples": 2787,
     "nearest_plain": {
      "km": 25.02,
      "azimuth": 98.5,
      "lat": 45.11129738449231,
      "lon": 7.3006407506662345,
      "z": 375.72216085354376
     },
     "farthest_plain": {
      "km": 104.31,
      "azimuth": 100.0,
      "lat": 44.97463728330423,
      "lon": 8.291279011164772,
      "z": 248.97553385402784
     },
     "azimuth_range_with_plain": [
      96.5,
      101.0
     ],
     "km_from_col": 6.0,
     "lat": 45.14499,
     "lon": 6.98531
    },
    {
     "z_obs": 1138.9656865234608,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.0125,
     "n_visible_plain_samples": 1889,
     "nearest_plain": {
      "km": 24.03,
      "azimuth": 99.0,
      "lat": 45.11029419374055,
      "lon": 7.300491746400463,
      "z": 373.1060791783693
     },
     "farthest_plain": {
      "km": 60.75,
      "azimuth": 97.5,
      "lat": 45.07061971126892,
      "lon": 7.765034542790334,
      "z": 389.0112600038051
     },
     "azimuth_range_with_plain": [
      96.75,
      101.0
     ],
     "km_from_col": 7.0,
     "lat": 45.1445,
     "lon": 6.99805
    },
    {
     "z_obs": 811.3216420820783,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.009027777777777777,
     "n_visible_plain_samples": 671,
     "nearest_plain": {
      "km": 23.13,
      "azimuth": 99.25,
      "lat": 45.10868410473048,
      "lon": 7.300922128996226,
      "z": 369.80501556137875
     },
     "farthest_plain": {
      "km": 59.67,
      "azimuth": 97.5,
      "lat": 45.06996809547183,
      "lon": 7.763360282217981,
      "z": 390.68828806104017
     },
     "azimuth_range_with_plain": [
      97.0,
      100.0
     ],
     "km_from_col": 8.0,
     "lat": 45.14249,
     "lon": 7.01002
    },
    {
     "z_obs": 666.4677258300956,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.003472222222222222,
     "n_visible_plain_samples": 48,
     "nearest_plain": {
      "km": 36.99,
      "azimuth": 98.25,
      "lat": 45.091316557284486,
      "lon": 7.487978137479533,
      "z": 329.4677628284046
     },
     "farthest_plain": {
      "km": 58.14,
      "azimuth": 98.75,
      "lat": 45.05812246424003,
      "lon": 7.753238816945743,
      "z": 388.46617833870357
     },
     "azimuth_range_with_plain": [
      98.0,
      99.0
     ],
     "km_from_col": 9.0,
     "lat": 45.14,
     "lon": 7.02165
    },
    {
     "z_obs": 620.3223046874937,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.0020833333333333333,
     "n_visible_plain_samples": 18,
     "nearest_plain": {
      "km": 37.8,
      "azimuth": 98.75,
      "lat": 45.08729795785649,
      "lon": 7.510285213929316,
      "z": 351.5578695547484
     },
     "farthest_plain": {
      "km": 57.24,
      "azimuth": 99.0,
      "lat": 45.05720946055531,
      "lon": 7.754161530285275,
      "z": 394.12637224033733
     },
     "azimuth_range_with_plain": [
      98.5,
      99.0
     ],
     "km_from_col": 10.0,
     "lat": 45.14,
     "lon": 7.0344
    }
   ],
   "first_descent_point_with_plain": {
    "z_obs": 2337.581409394504,
    "plain_visible": true,
    "frac_azimuths_plain_visible": 0.04861111111111111,
    "n_visible_plain_samples": 12820,
    "nearest_plain": {
     "km": 29.52,
     "azimuth": 102.75,
     "lat": 45.104971738633814,
     "lon": 7.301350870566005,
     "z": 370.59315008375495
    },
    "farthest_plain": {
     "km": 119.97,
     "azimuth": 103.0,
     "lat": 44.91180305407049,
     "lon": 8.418994261702153,
     "z": 127.57607836253204
    },
    "azimuth_range_with_plain": [
     95.25,
     112.5
    ],
    "km_from_col": 1.0,
    "lat": 45.16415,
    "lon": 6.93449
   },
   "knoll_+100": {
    "z_obs": 2580.425048828124,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0,
    "lat": 45.17,
    "lon": 6.925833333333333,
    "z": 2580.425048828125,
    "dist_m": 290.0780909295581,
    "dz_target": 100
   },
   "knoll_+300": {
    "z_obs": 2795.4528808593545,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0,
    "lat": 45.17166666666667,
    "lon": 6.93,
    "z": 2795.452880859375,
    "dist_m": 660.642680039811,
    "dz_target": 300
   },
   "vantage_scan": {
    "n_points": 56,
    "n_with_plain_visible": 29,
    "best": {
     "z_obs": 2711.524902343907,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.08125,
     "n_visible_plain_samples": 26244,
     "nearest_plain": {
      "km": 28.89,
      "azimuth": 102.25,
      "lat": 45.11430817051252,
      "lon": 7.30061894173188,
      "z": 384.40179133442894
     },
     "farthest_plain": {
      "km": 119.97,
      "azimuth": 91.0,
      "lat": 45.140960387523776,
      "lon": 8.470275077593206,
      "z": 108.77143295633948
     },
     "azimuth_range_with_plain": [
      90.0,
      119.25
     ],
     "lat": 45.17,
     "lon": 6.940833333333334,
     "z": 2711.52490234375,
     "dist_m": 1400.3037589505996
    }
   }
  },
  "Col du Petit Mont-Cenis": {
   "geocoded": {
    "lat": 45.2108326,
    "lon": 6.8661704,
    "z_dem": 2180.870625043674,
    "source": "Nominatim/OSM node/6712847446 (saddle)"
   },
   "saddle_dem_diagnostic": [
    45.20666666666666,
    6.8533333333333335,
    1788.2344970703125
   ],
   "used": {
    "lat": 45.2108326,
    "lon": 6.8661704,
    "z_dem": 2180.870625043674
   },
   "col": {
    "z_obs": 2180.870625043674,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0
   },
   "descent_points": [
    {
     "z_obs": 2176.412562218759,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.25,
     "lat": 45.21268,
     "lon": 6.86878
    },
    {
     "z_obs": 2158.041571171898,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.5,
     "lat": 45.21417,
     "lon": 6.87117
    },
    {
     "z_obs": 2144.267615546873,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.75,
     "lat": 45.21566,
     "lon": 6.87356
    },
    {
     "z_obs": 2142.330979589806,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.0,
     "lat": 45.21715,
     "lon": 6.87595
    },
    {
     "z_obs": 2136.7041610350916,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.25,
     "lat": 45.21865,
     "lon": 6.87833
    },
    {
     "z_obs": 2130.2520516796594,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.5,
     "lat": 45.21995,
     "lon": 6.88092
    },
    {
     "z_obs": 2137.366471546846,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.75,
     "lat": 45.22116,
     "lon": 6.88361
    },
    {
     "z_obs": 2120.088005312508,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.0,
     "lat": 45.22238,
     "lon": 6.8863
    },
    {
     "z_obs": 2089.4720662734653,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.25,
     "lat": 45.22359,
     "lon": 6.88899
    },
    {
     "z_obs": 2066.8204414062466,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.5,
     "lat": 45.2248,
     "lon": 6.89168
    },
    {
     "z_obs": 2044.2609496269217,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.75,
     "lat": 45.22601,
     "lon": 6.89437
    },
    {
     "z_obs": 2042.446022460954,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 3.0,
     "lat": 45.2275,
     "lon": 6.89667
    },
    {
     "z_obs": 2012.4829204492805,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 4.0,
     "lat": 45.23392,
     "lon": 6.90535
    },
    {
     "z_obs": 1959.0,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 5.0,
     "lat": 45.235,
     "lon": 6.91763
    },
    {
     "z_obs": 1959.0,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 6.0,
     "lat": 45.23401,
     "lon": 6.93013
    },
    {
     "z_obs": 1959.0,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 7.0,
     "lat": 45.2295,
     "lon": 6.94077
    },
    {
     "z_obs": 1917.5878953632687,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 8.0,
     "lat": 45.22206,
     "lon": 6.94779
    },
    {
     "z_obs": 1898.464033516171,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 9.0,
     "lat": 45.21359,
     "lon": 6.95005
    },
    {
     "z_obs": 1884.3376811484113,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 10.0,
     "lat": 45.20656,
     "lon": 6.95722
    }
   ],
   "first_descent_point_with_plain": null,
   "knoll_+100": {
    "z_obs": 2296.0913085936822,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0,
    "lat": 45.2125,
    "lon": 6.860833333333334,
    "z": 2296.09130859375,
    "dist_m": 457.74273764448793,
    "dz_target": 100
   },
   "knoll_+300": {
    "z_obs": 2567.054443359497,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0,
    "lat": 45.215,
    "lon": 6.858333333333333,
    "z": 2567.054443359375,
    "dist_m": 769.5780640252177,
    "dz_target": 300
   },
   "vantage_scan": {
    "n_points": 57,
    "n_with_plain_visible": 0,
    "best": {
     "z_obs": 2455.788085937461,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "lat": 45.2225,
     "lon": 6.856666666666667,
     "z": 2455.7880859375,
     "dist_m": 1495.5747254909659
    }
   }
  },
  "Col du Petit-Saint-Bernard": {
   "geocoded": {
    "lat": 45.6792488,
    "lon": 6.8829399,
    "z_dem": 2189.310533764771,
    "source": "Nominatim/OSM node/6126335144 (yes)"
   },
   "saddle_dem_diagnostic": [
    45.6875,
    6.8825,
    2088.975341796875
   ],
   "used": {
    "lat": 45.6792488,
    "lon": 6.8829399,
    "z_dem": 2189.310533764771
   },
   "col": {
    "z_obs": 2189.310533764771,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0
   },
   "descent_points": [
    {
     "z_obs": 2184.6099376953102,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.25,
     "lat": 45.68278,
     "lon": 6.88563
    },
    {
     "z_obs": 2174.6506571406503,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.5,
     "lat": 45.68483,
     "lon": 6.88694
    },
    {
     "z_obs": 2153.1156863281585,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.75,
     "lat": 45.68689,
     "lon": 6.88825
    },
    {
     "z_obs": 2155.0225695195722,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.0,
     "lat": 45.68881,
     "lon": 6.88983
    },
    {
     "z_obs": 2140.3949401249274,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.25,
     "lat": 45.69042,
     "lon": 6.89208
    },
    {
     "z_obs": 2123.4509784922107,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.5,
     "lat": 45.69202,
     "lon": 6.89433
    },
    {
     "z_obs": 2108.2034169921144,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.75,
     "lat": 45.69346,
     "lon": 6.89679
    },
    {
     "z_obs": 2075.4878504531507,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.0,
     "lat": 45.69484,
     "lon": 6.89934
    },
    {
     "z_obs": 2063.182384373007,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.25,
     "lat": 45.69621,
     "lon": 6.90189
    },
    {
     "z_obs": 2036.4475317186884,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.5,
     "lat": 45.69758,
     "lon": 6.90444
    },
    {
     "z_obs": 2015.149035125019,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.75,
     "lat": 45.69896,
     "lon": 6.90699
    },
    {
     "z_obs": 1998.7704893280816,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 3.0,
     "lat": 45.70033,
     "lon": 6.90954
    },
    {
     "z_obs": 1901.879397539202,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 4.0,
     "lat": 45.70437,
     "lon": 6.92046
    },
    {
     "z_obs": 1679.9112519433459,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 5.0,
     "lat": 45.70917,
     "lon": 6.93135
    },
    {
     "z_obs": 1496.7743986875057,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 6.0,
     "lat": 45.71398,
     "lon": 6.94224
    },
    {
     "z_obs": 1444.1226713476779,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 7.0,
     "lat": 45.72055,
     "lon": 6.94722
    },
    {
     "z_obs": 1401.26547560544,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 8.0,
     "lat": 45.72815,
     "lon": 6.95241
    },
    {
     "z_obs": 1310.715294003915,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 9.0,
     "lat": 45.73541,
     "lon": 6.95992
    },
    {
     "z_obs": 1281.7625021483896,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 10.0,
     "lat": 45.743,
     "lon": 6.96682
    }
   ],
   "first_descent_point_with_plain": null,
   "knoll_+100": {
    "z_obs": 2302.8234863280795,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0,
    "lat": 45.6775,
    "lon": 6.8875,
    "z": 2302.823486328125,
    "dist_m": 404.4263075198805,
    "dz_target": 100
   },
   "knoll_+300": {
    "z_obs": 2511.6306152342486,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0,
    "lat": 45.6825,
    "lon": 6.870833333333334,
    "z": 2511.630615234375,
    "dist_m": 1008.5473804600593,
    "dz_target": 300
   },
   "vantage_scan": {
    "n_points": 89,
    "n_with_plain_visible": 0,
    "best": {
     "z_obs": 2288.4667968749554,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "lat": 45.69083333333333,
     "lon": 6.873333333333333,
     "z": 2288.466796875,
     "dist_m": 1488.51786889962
    }
   }
  },
  "Col de Montgenevre": {
   "geocoded": {
    "lat": 44.9312741,
    "lon": 6.7257053,
    "z_dem": 1852.7416894138037,
    "source": "Nominatim/OSM node/442880977 (yes)"
   },
   "saddle_dem_diagnostic": [
    44.93333333333333,
    6.738333333333333,
    1817.0657958984375
   ],
   "used": {
    "lat": 44.9312741,
    "lon": 6.7257053,
    "z_dem": 1852.7416894138037
   },
   "col": {
    "z_obs": 1852.7416894138037,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0
   },
   "descent_points": [
    {
     "z_obs": 1850.806878457049,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.25,
     "lat": 44.93171,
     "lon": 6.72626
    },
    {
     "z_obs": 1841.8344582031248,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.5,
     "lat": 44.93206,
     "lon": 6.7294
    },
    {
     "z_obs": 1837.3759880273678,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.75,
     "lat": 44.93241,
     "lon": 6.73254
    },
    {
     "z_obs": 1826.4393158281666,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.0,
     "lat": 44.93276,
     "lon": 6.73567
    },
    {
     "z_obs": 1810.7544071874956,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.25,
     "lat": 44.93311,
     "lon": 6.73881
    },
    {
     "z_obs": 1803.5559242558436,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.5,
     "lat": 44.93387,
     "lon": 6.74167
    },
    {
     "z_obs": 1789.3917635585808,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.75,
     "lat": 44.93537,
     "lon": 6.74403
    },
    {
     "z_obs": 1783.1913464062432,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.0,
     "lat": 44.93687,
     "lon": 6.7464
    },
    {
     "z_obs": 1777.987856382873,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.25,
     "lat": 44.93838,
     "lon": 6.74876
    },
    {
     "z_obs": 1757.1704501347374,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.5,
     "lat": 44.93917,
     "lon": 6.75151
    },
    {
     "z_obs": 1746.0977979297481,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.75,
     "lat": 44.93937,
     "lon": 6.7546
    },
    {
     "z_obs": 1744.6894619843788,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 3.0,
     "lat": 44.94061,
     "lon": 6.75724
    },
    {
     "z_obs": 1595.3594528396602,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 4.0,
     "lat": 44.94559,
     "lon": 6.76782
    },
    {
     "z_obs": 1509.6706981874572,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 5.0,
     "lat": 44.94798,
     "lon": 6.77984
    },
    {
     "z_obs": 1351.1533994140646,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 6.0,
     "lat": 44.9525,
     "lon": 6.79083
    },
    {
     "z_obs": 1327.4204406738281,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 7.0,
     "lat": 44.96125,
     "lon": 6.79375
    },
    {
     "z_obs": 1276.207599121101,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 8.0,
     "lat": 44.97,
     "lon": 6.79667
    },
    {
     "z_obs": 1247.8501159375112,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 9.0,
     "lat": 44.97815,
     "lon": 6.80148
    },
    {
     "z_obs": 1214.6786817968687,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 10.0,
     "lat": 44.9863,
     "lon": 6.80598
    }
   ],
   "first_descent_point_with_plain": null,
   "knoll_+100": {
    "z_obs": 1955.999877929644,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0,
    "lat": 44.928333333333335,
    "lon": 6.7283333333333335,
    "z": 1955.9998779296875,
    "dist_m": 386.9148670356217,
    "dz_target": 100
   },
   "knoll_+300": {
    "z_obs": 2156.350830078027,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0,
    "lat": 44.939166666666665,
    "lon": 6.7175,
    "z": 2156.350830078125,
    "dist_m": 1089.7233909713577,
    "dz_target": 300
   },
   "vantage_scan": {
    "n_points": 91,
    "n_with_plain_visible": 0,
    "best": {
     "z_obs": 2142.0930175781905,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "lat": 44.9425,
     "lon": 6.724166666666667,
     "z": 2142.093017578125,
     "dist_m": 1253.435873470363
    }
   }
  },
  "Col de la Traversette": {
   "geocoded": {
    "lat": 44.7108916,
    "lon": 7.0663531,
    "z_dem": 2911.908847533127,
    "source": "Nominatim/OSM node/293467280 (yes)"
   },
   "saddle_dem_diagnostic": [
    44.7075,
    7.07,
    2699.96142578125
   ],
   "used": {
    "lat": 44.7108916,
    "lon": 7.0663531,
    "z_dem": 2911.908847533127
   },
   "col": {
    "z_obs": 2911.908847533127,
    "plain_visible": true,
    "frac_azimuths_plain_visible": 0.17291666666666666,
    "n_visible_plain_samples": 76303,
    "nearest_plain": {
     "km": 25.56,
     "azimuth": 107.75,
     "lat": 44.640400201643175,
     "lon": 7.374033608902576,
     "z": 388.3969024970632
    },
    "farthest_plain": {
     "km": 119.97,
     "azimuth": 59.75,
     "lat": 45.24682169032419,
     "lon": 8.390161301650696,
     "z": 125.24376672723075
    },
    "azimuth_range_with_plain": [
     59.75,
     122.75
    ]
   },
   "descent_points": [
    {
     "z_obs": 2734.9417390078256,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.11527777777777778,
     "n_visible_plain_samples": 42570,
     "nearest_plain": {
      "km": 26.46,
      "azimuth": 107.0,
      "lat": 44.63941055587161,
      "lon": 7.388356227861835,
      "z": 367.63228841229636
     },
     "farthest_plain": {
      "km": 119.97,
      "azimuth": 81.25,
      "lat": 44.86369872333727,
      "lon": 8.57310676385775,
      "z": 98.78153441127813
     },
     "azimuth_range_with_plain": [
      81.25,
      122.5
     ],
     "km_from_col": 0.25,
     "lat": 44.70943,
     "lon": 7.06854
    },
    {
     "z_obs": 2661.1870393437507,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.13472222222222222,
     "n_visible_plain_samples": 43982,
     "nearest_plain": {
      "km": 26.91,
      "azimuth": 106.5,
      "lat": 44.638821903711,
      "lon": 7.397047392488342,
      "z": 357.16430298294625
     },
     "farthest_plain": {
      "km": 119.97,
      "azimuth": 74.25,
      "lat": 44.99150410812618,
      "lon": 8.539325580688441,
      "z": 187.9947614958902
     },
     "azimuth_range_with_plain": [
      74.25,
      122.5
     ],
     "km_from_col": 0.5,
     "lat": 44.70802,
     "lon": 7.07094
    },
    {
     "z_obs": 2539.3824151171684,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.1076388888888889,
     "n_visible_plain_samples": 37158,
     "nearest_plain": {
      "km": 27.27,
      "azimuth": 106.25,
      "lat": 44.637955347108296,
      "lon": 7.4046990948766,
      "z": 347.2416758783985
     },
     "farthest_plain": {
      "km": 119.97,
      "azimuth": 81.75,
      "lat": 44.851994073717236,
      "lon": 8.580034496912047,
      "z": 101.25396706701163
     },
     "azimuth_range_with_plain": [
      81.75,
      121.25
     ],
     "km_from_col": 0.75,
     "lat": 44.70706,
     "lon": 7.07381
    },
    {
     "z_obs": 2406.1983040234572,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.06458333333333334,
     "n_visible_plain_samples": 21162,
     "nearest_plain": {
      "km": 27.45,
      "azimuth": 106.25,
      "lat": 44.637106046007176,
      "lon": 7.409918317242323,
      "z": 343.7616114084793
     },
     "farthest_plain": {
      "km": 119.88,
      "azimuth": 92.75,
      "lat": 44.64494103004235,
      "lon": 8.590501624651372,
      "z": 392.7861147340121
     },
     "azimuth_range_with_plain": [
      92.5,
      115.5
     ],
     "km_from_col": 1.0,
     "lat": 44.70667,
     "lon": 7.07685
    },
    {
     "z_obs": 2358.9662840039773,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.043055555555555555,
     "n_visible_plain_samples": 14712,
     "nearest_plain": {
      "km": 27.45,
      "azimuth": 106.5,
      "lat": 44.63607384609295,
      "lon": 7.412645632253181,
      "z": 340.3854299388593
     },
     "farthest_plain": {
      "km": 81.09,
      "azimuth": 114.25,
      "lat": 44.40335730551194,
      "lon": 8.010710408918973,
      "z": 393.56454818411294
     },
     "azimuth_range_with_plain": [
      100.25,
      115.5
     ],
     "km_from_col": 1.25,
     "lat": 44.70667,
     "lon": 7.08001
    },
    {
     "z_obs": 2332.016868367244,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.03125,
     "n_visible_plain_samples": 8755,
     "nearest_plain": {
      "km": 34.74,
      "azimuth": 108.75,
      "lat": 44.605240392313554,
      "lon": 7.498604536742707,
      "z": 398.52560125352585
     },
     "farthest_plain": {
      "km": 80.37,
      "azimuth": 114.75,
      "lat": 44.40012405959328,
      "lon": 8.001794091013956,
      "z": 398.8976632015191
     },
     "azimuth_range_with_plain": [
      105.0,
      116.0
     ],
     "km_from_col": 1.5,
     "lat": 44.70642,
     "lon": 7.08307
    },
    {
     "z_obs": 2287.5437311642254,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.04027777777777778,
     "n_visible_plain_samples": 13515,
     "nearest_plain": {
      "km": 27.09,
      "azimuth": 106.25,
      "lat": 44.63659464322383,
      "lon": 7.414467289495119,
      "z": 338.48791534200194
     },
     "farthest_plain": {
      "km": 80.19,
      "azimuth": 114.5,
      "lat": 44.402483913653356,
      "lon": 8.004308780877661,
      "z": 394.61679404900696
     },
     "azimuth_range_with_plain": [
      100.75,
      115.0
     ],
     "km_from_col": 1.75,
     "lat": 44.70524,
     "lon": 7.08577
    },
    {
     "z_obs": 2214.674872999938,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.0006944444444444445,
     "n_visible_plain_samples": 7,
     "nearest_plain": {
      "km": 69.48,
      "azimuth": 112.5,
      "lat": 44.46207872383741,
      "lon": 7.897315733439178,
      "z": 338.0578724610473
     },
     "farthest_plain": {
      "km": 70.29,
      "azimuth": 112.5,
      "lat": 44.45922413026743,
      "lon": 7.906705645770723,
      "z": 390.8459824529741
     },
     "azimuth_range_with_plain": [
      112.5,
      112.5
     ],
     "km_from_col": 2.0,
     "lat": 44.70406,
     "lon": 7.08846
    },
    {
     "z_obs": 2140.7774238672323,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.021527777777777778,
     "n_visible_plain_samples": 5585,
     "nearest_plain": {
      "km": 35.1,
      "azimuth": 105.0,
      "lat": 44.620379406397646,
      "lon": 7.519524564709793,
      "z": 372.5103098137689
     },
     "farthest_plain": {
      "km": 73.44,
      "azimuth": 105.25,
      "lat": 44.52566565116152,
      "lon": 7.98494081758813,
      "z": 393.32960013310833
     },
     "azimuth_range_with_plain": [
      102.75,
      110.25
     ],
     "km_from_col": 2.25,
     "lat": 44.70288,
     "lon": 7.09115
    },
    {
     "z_obs": 2042.1858757814168,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.5,
     "lat": 44.7017,
     "lon": 7.09385
    },
    {
     "z_obs": 2013.2202250390444,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.75,
     "lat": 44.7007,
     "lon": 7.09664
    },
    {
     "z_obs": 2023.3578341288335,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 3.0,
     "lat": 44.70019,
     "lon": 7.09972
    },
    {
     "z_obs": 1976.8122768594772,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.00625,
     "n_visible_plain_samples": 439,
     "nearest_plain": {
      "km": 57.06,
      "azimuth": 117.75,
      "lat": 44.46475737570855,
      "lon": 7.7457395858527835,
      "z": 396.97785168312345
     },
     "farthest_plain": {
      "km": 68.4,
      "azimuth": 118.5,
      "lat": 44.409435822747845,
      "lon": 7.866169258386727,
      "z": 389.45882416881966
     },
     "azimuth_range_with_plain": [
      117.5,
      119.5
     ],
     "km_from_col": 4.0,
     "lat": 44.70546,
     "lon": 7.10941
    },
    {
     "z_obs": 1835.4812275390093,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.059027777777777776,
     "n_visible_plain_samples": 13094,
     "nearest_plain": {
      "km": 25.74,
      "azimuth": 107.5,
      "lat": 44.63327082517963,
      "lon": 7.431078982884224,
      "z": 352.43962704906585
     },
     "farthest_plain": {
      "km": 117.0,
      "azimuth": 92.25,
      "lat": 44.65245351824874,
      "lon": 8.598878167195783,
      "z": 381.6199949730101
     },
     "azimuth_range_with_plain": [
      92.25,
      113.25
     ],
     "km_from_col": 5.0,
     "lat": 44.7033,
     "lon": 7.12084
    },
    {
     "z_obs": 1622.0490382383098,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.03125,
     "n_visible_plain_samples": 7753,
     "nearest_plain": {
      "km": 25.11,
      "azimuth": 108.0,
      "lat": 44.63261026888599,
      "lon": 7.435268003235495,
      "z": 390.6343150999505
     },
     "farthest_plain": {
      "km": 70.2,
      "azimuth": 106.0,
      "lat": 44.52560596964134,
      "lon": 7.984704326350604,
      "z": 393.1249973976671
     },
     "azimuth_range_with_plain": [
      100.75,
      111.75
     ],
     "km_from_col": 6.0,
     "lat": 44.70279,
     "lon": 7.13347
    },
    {
     "z_obs": 1456.3625941642151,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.017361111111111112,
     "n_visible_plain_samples": 3591,
     "nearest_plain": {
      "km": 31.41,
      "azimuth": 109.0,
      "lat": 44.60889988691358,
      "lon": 7.521086824842949,
      "z": 382.9721953049676
     },
     "farthest_plain": {
      "km": 69.03,
      "azimuth": 106.25,
      "lat": 44.52470660236647,
      "lon": 7.98189840068514,
      "z": 379.5861908416128
     },
     "azimuth_range_with_plain": [
      105.5,
      111.5
     ],
     "km_from_col": 7.0,
     "lat": 44.70148,
     "lon": 7.14592
    },
    {
     "z_obs": 1346.960526703098,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.007638888888888889,
     "n_visible_plain_samples": 925,
     "nearest_plain": {
      "km": 33.39,
      "azimuth": 108.25,
      "lat": 44.603241474905076,
      "lon": 7.5579208216051805,
      "z": 366.972194999154
     },
     "farthest_plain": {
      "km": 65.7,
      "azimuth": 107.0,
      "lat": 44.52248533234734,
      "lon": 7.949895495773529,
      "z": 397.3181924541878
     },
     "azimuth_range_with_plain": [
      107.0,
      109.5
     ],
     "km_from_col": 8.0,
     "lat": 44.69798,
     "lon": 7.15738
    },
    {
     "z_obs": 1238.1800818474917,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 9.0,
     "lat": 44.69613,
     "lon": 7.16954
    },
    {
     "z_obs": 1111.9499287892015,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 10.0,
     "lat": 44.69136,
     "lon": 7.18026
    }
   ],
   "first_descent_point_with_plain": {
    "z_obs": 2734.9417390078256,
    "plain_visible": true,
    "frac_azimuths_plain_visible": 0.11527777777777778,
    "n_visible_plain_samples": 42570,
    "nearest_plain": {
     "km": 26.46,
     "azimuth": 107.0,
     "lat": 44.63941055587161,
     "lon": 7.388356227861835,
     "z": 367.63228841229636
    },
    "farthest_plain": {
     "km": 119.97,
     "azimuth": 81.25,
     "lat": 44.86369872333727,
     "lon": 8.57310676385775,
     "z": 98.78153441127813
    },
    "azimuth_range_with_plain": [
     81.25,
     122.5
    ],
    "km_from_col": 0.25,
    "lat": 44.70943,
    "lon": 7.06854
   },
   "knoll_+100": {
    "z_obs": 3048.2597656248186,
    "plain_visible": true,
    "frac_azimuths_plain_visible": 0.21736111111111112,
    "n_visible_plain_samples": 135632,
    "nearest_plain": {
     "km": 24.84,
     "azimuth": 50.25,
     "lat": 44.851756027736734,
     "lon": 7.307268777598437,
     "z": 369.99256013161573
    },
    "farthest_plain": {
     "km": 119.97,
     "azimuth": 45.5,
     "lat": 45.46018158681652,
     "lon": 8.162138095036463,
     "z": 217.06993107780778
    },
    "azimuth_range_with_plain": [
     44.5,
     122.5
    ],
    "lat": 44.70916666666667,
    "lon": 7.065,
    "z": 3048.259765625,
    "dist_m": 219.55825424306025,
    "dz_target": 100
   },
   "knoll_+300": null,
   "vantage_scan": {
    "n_points": 18,
    "n_with_plain_visible": 14,
    "best": {
     "z_obs": 3001.163085937402,
     "plain_visible": true,
     "frac_azimuths_plain_visible": 0.25555555555555554,
     "n_visible_plain_samples": 163106,
     "nearest_plain": {
      "km": 22.68,
      "azimuth": 52.0,
      "lat": 44.84285004547327,
      "lon": 7.300848606525238,
      "z": 395.78888106700714
     },
     "farthest_plain": {
      "km": 119.97,
      "azimuth": 45.5,
      "lat": 45.4685133921722,
      "lon": 8.171466943707992,
      "z": 216.35317660749294
     },
     "azimuth_range_with_plain": [
      32.0,
      123.75
     ],
     "lat": 44.7175,
     "lon": 7.074166666666667,
     "z": 3001.1630859375,
     "dist_m": 959.9214530516788
    }
   }
  },
  "Col de Larche": {
   "geocoded": {
    "lat": 44.4218328,
    "lon": 6.8984272,
    "z_dem": 1996.2608982748795,
    "source": "Nominatim/OSM node/928715494 (yes)"
   },
   "saddle_dem_diagnostic": [
    44.41916666666667,
    6.885833333333334,
    1907.56591796875
   ],
   "used": {
    "lat": 44.4218328,
    "lon": 6.8984272,
    "z_dem": 1996.2608982748795
   },
   "col": {
    "z_obs": 1996.2608982748795,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0
   },
   "descent_points": [
    {
     "z_obs": 1999.4016555742407,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.25,
     "lat": 44.42149,
     "lon": 6.89858
    },
    {
     "z_obs": 1989.2660578125017,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.5,
     "lat": 44.4199,
     "lon": 6.90081
    },
    {
     "z_obs": 1971.8540739238358,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.75,
     "lat": 44.41831,
     "lon": 6.90303
    },
    {
     "z_obs": 1971.8382096328116,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.0,
     "lat": 44.41672,
     "lon": 6.90526
    },
    {
     "z_obs": 1973.0247307304544,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.25,
     "lat": 44.41513,
     "lon": 6.90748
    },
    {
     "z_obs": 1979.2252747148736,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.5,
     "lat": 44.41354,
     "lon": 6.90971
    },
    {
     "z_obs": 1977.9002730078616,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.75,
     "lat": 44.41195,
     "lon": 6.91194
    },
    {
     "z_obs": 1981.0952462032492,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.0,
     "lat": 44.41036,
     "lon": 6.91416
    },
    {
     "z_obs": 1958.5185785390943,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.25,
     "lat": 44.40883,
     "lon": 6.91646
    },
    {
     "z_obs": 1933.9630368476542,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.5,
     "lat": 44.40748,
     "lon": 6.91897
    },
    {
     "z_obs": 1915.4768818047314,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.75,
     "lat": 44.40612,
     "lon": 6.92148
    },
    {
     "z_obs": 1908.2989080077916,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 3.0,
     "lat": 44.40477,
     "lon": 6.924
    },
    {
     "z_obs": 1810.1254765821095,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 4.0,
     "lat": 44.39936,
     "lon": 6.93405
    },
    {
     "z_obs": 1684.081744824224,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 5.0,
     "lat": 44.39387,
     "lon": 6.942
    },
    {
     "z_obs": 1651.5339978711072,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 6.0,
     "lat": 44.39253,
     "lon": 6.9541
    },
    {
     "z_obs": 1642.6307000097859,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 7.0,
     "lat": 44.38603,
     "lon": 6.96235
    },
    {
     "z_obs": 1619.7867818358986,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 8.0,
     "lat": 44.3792,
     "lon": 6.97019
    },
    {
     "z_obs": 1573.4164198203903,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 9.0,
     "lat": 44.37362,
     "lon": 6.98006
    },
    {
     "z_obs": 1492.5196393944482,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 10.0,
     "lat": 44.36718,
     "lon": 6.98865
    }
   ],
   "first_descent_point_with_plain": null,
   "knoll_+100": {
    "z_obs": 2097.8027343749695,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0,
    "lat": 44.420833333333334,
    "lon": 6.8933333333333335,
    "z": 2097.802734375,
    "dist_m": 419.9452743172615,
    "dz_target": 100
   },
   "knoll_+300": {
    "z_obs": 2298.3171386719405,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0,
    "lat": 44.42666666666667,
    "lon": 6.906666666666666,
    "z": 2298.317138671875,
    "dist_m": 847.1797958274921,
    "dz_target": 300
   },
   "vantage_scan": {
    "n_points": 68,
    "n_with_plain_visible": 0,
    "best": {
     "z_obs": 2131.957519531096,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "lat": 44.43333333333333,
     "lon": 6.889166666666666,
     "z": 2131.95751953125,
     "dist_m": 1474.979332360782
    }
   }
  },
  "Col du Grand-Saint-Bernard": {
   "geocoded": {
    "lat": 45.8690526,
    "lon": 7.1704088,
    "z_dem": 2471.8487426395295,
    "source": "Nominatim/OSM node/2001818936 (yes)"
   },
   "saddle_dem_diagnostic": [
    45.8775,
    7.184166666666667,
    2251.37353515625
   ],
   "used": {
    "lat": 45.8690526,
    "lon": 7.1704088,
    "z_dem": 2471.8487426395295
   },
   "col": {
    "z_obs": 2471.8487426395295,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0
   },
   "descent_points": [
    {
     "z_obs": 2473.66642020301,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.25,
     "lat": 45.86924,
     "lon": 7.17031
    },
    {
     "z_obs": 2446.568791093709,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.5,
     "lat": 45.86829,
     "lon": 7.16738
    },
    {
     "z_obs": 2448.0191523437534,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 0.75,
     "lat": 45.8671,
     "lon": 7.1649
    },
    {
     "z_obs": 2436.350043124961,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.0,
     "lat": 45.86488,
     "lon": 7.16435
    },
    {
     "z_obs": 2445.0294110310856,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.25,
     "lat": 45.86279,
     "lon": 7.16509
    },
    {
     "z_obs": 2442.3092504882607,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.5,
     "lat": 45.86075,
     "lon": 7.16645
    },
    {
     "z_obs": 2436.7601307461928,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 1.75,
     "lat": 45.85871,
     "lon": 7.16781
    },
    {
     "z_obs": 2280.7121339297896,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.0,
     "lat": 45.85667,
     "lon": 7.16916
    },
    {
     "z_obs": 2168.230521937499,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.25,
     "lat": 45.85463,
     "lon": 7.17052
    },
    {
     "z_obs": 2065.3792886483707,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.5,
     "lat": 45.85259,
     "lon": 7.17188
    },
    {
     "z_obs": 1946.664039160015,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 2.75,
     "lat": 45.85055,
     "lon": 7.17324
    },
    {
     "z_obs": 1832.9398910545428,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 3.0,
     "lat": 45.84851,
     "lon": 7.1746
    },
    {
     "z_obs": 1718.550366375082,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 4.0,
     "lat": 45.84036,
     "lon": 7.18004
    },
    {
     "z_obs": 1643.4744847617462,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 5.0,
     "lat": 45.83191,
     "lon": 7.18406
    },
    {
     "z_obs": 1523.7450966093472,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 6.0,
     "lat": 45.82333,
     "lon": 7.18301
    },
    {
     "z_obs": 1366.854341699218,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 7.0,
     "lat": 45.82055,
     "lon": 7.19501
    },
    {
     "z_obs": 1312.3692249121145,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 8.0,
     "lat": 45.82155,
     "lon": 7.20751
    },
    {
     "z_obs": 1284.718467511663,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 9.0,
     "lat": 45.82153,
     "lon": 7.22034
    },
    {
     "z_obs": 1271.96153803907,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "km_from_col": 10.0,
     "lat": 45.82009,
     "lon": 7.23219
    }
   ],
   "first_descent_point_with_plain": null,
   "knoll_+100": {
    "z_obs": 2576.1489257810235,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0,
    "lat": 45.87083333333333,
    "lon": 7.170833333333333,
    "z": 2576.14892578125,
    "dist_m": 200.61367262302755,
    "dz_target": 100
   },
   "knoll_+300": {
    "z_obs": 2780.4526367184803,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0,
    "lat": 45.86333333333333,
    "lon": 7.171666666666667,
    "z": 2780.45263671875,
    "dist_m": 643.0283040760389,
    "dz_target": 300
   },
   "vantage_scan": {
    "n_points": 57,
    "n_with_plain_visible": 0,
    "best": {
     "z_obs": 2752.9912109373654,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "lat": 45.880833333333335,
     "lon": 7.163333333333334,
     "z": 2752.9912109375,
     "dist_m": 1419.446552309011
    }
   }
  },
  "Col Agnel": {
   "geocoded": {
    "lat": 44.6838851,
    "lon": 6.9795875,
    "z_dem": 2731.3067304753145,
    "source": "Nominatim/OSM node/412129180 (yes)"
   },
   "saddle_dem_diagnostic": [
    44.68833333333333,
    6.966666666666667,
    2497.931884765625
   ],
   "used": {
    "lat": 44.6838851,
    "lon": 6.9795875,
    "z_dem": 2731.3067304753145
   },
   "col": {
    "z_obs": 2731.3067304753145,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0
   },
   "descent_points": [],
   "first_descent_point_with_plain": null,
   "knoll_+100": {
    "z_obs": 2833.0688476562646,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0,
    "lat": 44.68,
    "lon": 6.975,
    "z": 2833.06884765625,
    "dist_m": 564.1381936252981,
    "dz_target": 100
   },
   "knoll_+300": {
    "z_obs": 3055.660644531043,
    "plain_visible": false,
    "frac_azimuths_plain_visible": 0.0,
    "n_visible_plain_samples": 0,
    "lat": 44.69,
    "lon": 6.993333333333334,
    "z": 3055.66064453125,
    "dist_m": 1282.753404837482,
    "dz_target": 300
   },
   "vantage_scan": {
    "n_points": 47,
    "n_with_plain_visible": 0,
    "best": {
     "z_obs": 2736.4404296875277,
     "plain_visible": false,
     "frac_azimuths_plain_visible": 0.0,
     "n_visible_plain_samples": 0,
     "lat": 44.695,
     "lon": 6.9775,
     "z": 2736.4404296875,
     "dist_m": 1246.2220353251157
    }
   }
  }
 }
}