{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://stac-extensions.github.io/ortho/v0.1.0/schema.json#",
  "title": "Orthophoto Extension",
  "description": "STAC Orthophoto Extension for STAC Collections and STAC Items.",
  "type": "object",
  "required": [
    "stac_extensions",
    "type"
  ],
  "properties": {
    "stac_extensions": {
      "type": "array",
      "contains": {
        "const": "https://stac-extensions.github.io/ortho/v0.1.0/schema.json"
      }
    },
    "type": {
      "type": "string",
      "enum": [
        "Collection",
        "Feature"
      ]
    },
    "assets": {
      "type": "object",
      "additionalProperties": {
        "$ref": "#/definitions/fields"
      }
    }
  },
  "oneOf": [
    {
      "type": "object",
      "required": [
        "type",
        "properties"
      ],
      "properties": {
        "type": {
          "const": "Feature"
        },
        "properties": {
          "$ref": "#/definitions/fields"
        }
      }
    },
    {
      "type": "object",
      "required": [
        "type"
      ],
      "properties": {
        "type": {
          "const": "Collection"
        },
        "summaries": {
          "$ref": "#/definitions/summaries"
        },
        "item_assets": {
          "type": "object",
          "additionalProperties": {
            "$ref": "#/definitions/fields"
          }
        }
      },
      "allOf": [
        {
          "$ref": "#/definitions/fields"
        }
      ]
    }
  ],
  "definitions": {
    "elevation_model": {
      "type": "string",
      "enum": [
        "surface",
        "terrain"
      ]
    },
    "leaf_state": {
      "type": "string",
      "enum": [
        "leaf-off",
        "partial",
        "leaf-on",
        "unknown"
      ]
    },
    "ortho:elevation_model": {
      "type": "array",
      "minItems": 1,
      "uniqueItems": true,
      "items": {
        "$ref": "#/definitions/elevation_model"
      }
    },
    "ortho:leaf_state": {
      "type": "array",
      "minItems": 1,
      "uniqueItems": true,
      "items": {
        "$ref": "#/definitions/leaf_state"
      },
      "if": {
        "contains": {
          "const": "unknown"
        }
      },
      "then": {
        "maxItems": 1
      }
    },
    "fields": {
      "type": "object",
      "properties": {
        "ortho:elevation_model": {
          "$ref": "#/definitions/ortho:elevation_model"
        },
        "ortho:leaf_state": {
          "$ref": "#/definitions/ortho:leaf_state"
        }
      },
      "patternProperties": {
        "^(?!ortho:)": {}
      },
      "additionalProperties": false
    },
    "summaries": {
      "type": "object",
      "properties": {
        "ortho:elevation_model": {
          "type": "array",
          "items": {
            "$ref": "#/definitions/elevation_model"
          }
        },
        "ortho:leaf_state": {
          "type": "array",
          "items": {
            "$ref": "#/definitions/leaf_state"
          }
        }
      },
      "patternProperties": {
        "^(?!ortho:)": {}
      },
      "additionalProperties": false
    }
  }
}