topostack.app

{
  "type": "object",
  "required": [
    "area"
  ],
  "additionalProperties": false,
  "properties": {
    "area": {
      "description": "The ground to model. Use center + widthKm for a place and a span, or bounds to keep a whole box in view; the crop is fitted to the model's proportions.",
      "oneOf": [
        {
          "type": "object",
          "title": "Center and width",
          "required": [
            "center",
            "widthKm"
          ],
          "additionalProperties": false,
          "properties": {
            "center": {
              "type": "object",
              "required": [
                "lat",
                "lon"
              ],
              "additionalProperties": false,
              "properties": {
                "lat": {
                  "type": "number",
                  "minimum": -85.0511,
                  "maximum": 85.0511
                },
                "lon": {
                  "type": "number",
                  "minimum": -180,
                  "maximum": 180
                }
              }
            },
            "widthKm": {
              "type": "number",
              "minimum": 0.1,
              "maximum": 2000,
              "description": "Ground distance shown from west to east, in kilometres."
            }
          }
        },
        {
          "type": "object",
          "title": "Bounding box",
          "required": [
            "bounds"
          ],
          "additionalProperties": false,
          "properties": {
            "bounds": {
              "type": "object",
              "required": [
                "west",
                "south",
                "east",
                "north"
              ],
              "additionalProperties": false,
              "description": "WGS84 degrees; south < north. West greater than east crosses the antimeridian, as in GeoJSON.",
              "properties": {
                "west": {
                  "type": "number",
                  "minimum": -180,
                  "maximum": 180
                },
                "south": {
                  "type": "number",
                  "minimum": -85.0511,
                  "maximum": 85.0511
                },
                "east": {
                  "type": "number",
                  "minimum": -180,
                  "maximum": 180
                },
                "north": {
                  "type": "number",
                  "minimum": -85.0511,
                  "maximum": 85.0511
                }
              }
            }
          }
        }
      ]
    }
  }
}