{
 "method": "Affine fit of OpenStreetMap river centre-lines (Godavari, Nasardi, Waldi, Darna, Waghadi, Alandi) to the river centre-lines of the merged DP map: global search, then iterative closest point. Checked independently against the railway at Nashik Road, Mumbai Naka junction and the Ahilyabai Holkar bridge.",
 "accuracy_m": {
  "median": 14.5,
  "p90": 30.0,
  "note": "Typical error 10-30 m. Fine for finding your area or plot; not survey-grade."
 },
 "local_projection": {
  "lat0": 19.95,
  "lon0": 73.8,
  "metres_per_deg_lon": 104606.58254588733,
  "metres_per_deg_lat": 110574,
  "formula": "e=(lon-lon0)*metres_per_deg_lon; s=-(lat-lat0)*metres_per_deg_lat"
 },
 "metres_to_pixel": {
  "matrix": [
   [
    1.2385861423861193,
    0.10999306190004839,
    15573.473521060469
   ],
   [
    -0.1154765311679072,
    1.250307067818259,
    18689.806855928942
   ]
  ],
  "formula": "[x,y] = M[:,0:2] @ [e,s] + M[:,2]  (mosaic pixels, origin top-left)"
 },
 "pixel_to_metres_inverse_2x2": [
  [
   0.8008040452985742,
   -0.07044900504164685
  ],
  [
   0.07396108978066557,
   0.7932969578459863
  ]
 ],
 "map_rotation_deg": -5.33,
 "metres_per_pixel": 0.8003,
 "osm_attribution": "Contains data from OpenStreetMap contributors (ODbL), used only to compute this alignment."
}