{
  "id": "equidistant-v1",
  "width": 640,
  "height": 640,
  "center": [
    320,
    320
  ],
  "radius": 300,
  "horizonElevationDeg": 0,
  "north": "top",
  "east": "right",
  "projection": "r=300*(90-elevation)/90; x=320+r*sin(azimuth); y=320-r*cos(azimuth)",
  "pixelCoordinateDecimalPlaces": 6,
  "opticalProjection": "x=320+10*(azimuth-45); y=180-10*(elevation-25)",
  "scope": "Synthetic display geometry; ideal flat horizon. No distortion calibration, absolute bearing measurement, distance or geodetic transform."
}