schema.json

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://stac-extensions.github.io/view/v1.0.0/schema.json#",
  "title": "View Geometry Extension",
  "description": "STAC View Geometry Extension for STAC Items and STAC Collections.",
  "oneOf": [
    {
      "$comment": "This is the schema for STAC Items.",
      "allOf": [
        {
          "type": "object",
          "required": [
            "type",
            "properties",
            "assets"
          ],
          "properties": {
            "type": {
              "const": "Feature"
            },
            "properties": {
              "allOf": [
                {
                  "anyOf": [
                    {"required": ["view:off_nadir"]},
                    {"required": ["view:incidence_angle"]},
                    {"required": ["view:azimuth"]},
                    {"required": ["view:sun_azimuth"]},
                    {"required": ["view:sun_elevation"]}
                  ]
                },
                {
                  "$ref": "#/definitions/fields"
                }
              ]
            },
            "assets": {
              "type": "object",
              "additionalProperties": {
                "$ref": "#/definitions/fields"
              }
            }
          }
        },
        {
          "$ref": "#/definitions/stac_extensions"
        }
      ]
    },
    {
      "$comment": "This is the schema for STAC Collections.",
      "allOf": [
        {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "const": "Collection"
            },
            "assets": {
              "type": "object",
              "additionalProperties": {
                "$ref": "#/definitions/fields"
              }
            },
            "item_assets": {
              "type": "object",
              "additionalProperties": {
                "$ref": "#/definitions/fields"
              }
            }
          }
        },
        {
          "$ref": "#/definitions/stac_extensions"
        }
      ]
    }
  ],
  "definitions": {
    "stac_extensions": {
      "type": "object",
      "required": [
        "stac_extensions"
      ],
      "properties": {
        "stac_extensions": {
          "type": "array",
          "contains": {
            "contains": {
              "const": "https://stac-extensions.github.io/view/v1.0.0/schema.json"
            }
          }
        }
      }
    },
    "fields": {
      "$comment": "Add your new fields here. Don't require them here, do that above in the item schema.",
      "type": "object",
      "properties": {
        "view:off_nadir": {
          "title": "Off Nadir",
          "type": "number",
          "minimum": 0,
          "maximum": 90
        },
        "view:incidence_angle": {
          "title": "Center incidence angle",
          "type": "number",
          "minimum": 0,
          "maximum": 90
        },
        "view:azimuth": {
          "title": "Azimuth angle",
          "type": "number",
          "minimum": 0,
          "maximum": 360
        },
        "view:sun_azimuth": {
          "title": "Sun Azimuth",
          "type": "number",
          "minimum": 0,
          "maximum": 360
        },
        "view:sun_elevation": {
          "title": "Sun Elevation",
          "type": "number",
          "minimum": -90,
          "maximum": 90
        }
      },
      "patternProperties": {
        "^(?!view:)": {}
      },
      "additionalProperties": false
    }
  }
}