Type name: application

Subtype name: fg+json

Required parameters: n/a

Optional parameters:

  "compatibility": If provided, the value "geojson" indicates that JSON-FG features
  with a "place" member that is not 'null' will also include a GeoJSON geometry
  in the "geometry" member (a point, line string, polygon or an aggregation of them
  in WGS 84). If the parameter is missing, the "geometry" member of a JSON-FG feature
  will be 'null', if the "place" member is not 'null'. For any other parameter value,
  the behavior is unspecified.

Encoding considerations: binary

Security considerations: The security considerations for GeoJSON as specified in Section 10 of IETF RFC 7946 also apply to JSON-FG.

Interoperability considerations: The interoperability considerations for GeoJSON as specified in Section 11 of IETF RFC 7946 also apply to JSON-FG.

Published specification: this document

Applications that use this media type: No known applications currently use this media type.
   This media type is intended for applications currently using the "application/vnd.ogc.fg+json"
   media type, which include APIs for managing, publishing or processing geospatial data,
   tools for processing geospatial data, web mapping applications, etc.

Additional information:

  Magic number(s): n/a

  File extension(s): .json, .jsonfg

  Macintosh file type code: TEXT

Person to contact for further information:

   1. Name: Scott Simmons
   2. Email: ssimmons@ogc.org

Intended usage: COMMON

  GeoJSON (IETF RFC 7946) is a popular encoding for geospatial data. GeoJSON is widely supported.
  However, GeoJSON has intentional restrictions that prevent or limit its use in certain geospatial
  application contexts. For example, GeoJSON is restricted to WGS 84 coordinates, does not
  support volumetric geometries and has no concept of classifying features according to their type.
  JSON-FG (OGC Features and Geometries JSON) specifies a set of GeoJSON extensions that provide
  standard ways to support such requirements.

Restrictions on usage: n/a

Change controller: Open Geospatial Consortium (OGC)

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{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://beta.schemas.opengis.net/json-fg/featurecollection.json",
  "title": "a JSON-FG Feature Collection",
  "description": "This JSON Schema is part of JSON-FG version 0.2.2",
  "type": "object",
  "required": ["type", "features"],
  "properties": {
    "conformsTo": {
      "$ref": "conformsto.json"
    },
    "type": {
      "type": "string",
      "enum": ["FeatureCollection"]
    },
    "featureType": {
      "$ref": "featuretype.json"
    },
    "geometryDimension": {
      "type": "integer",
      "minimum": 0,
      "maximum": 3
    },
    "featureSchema": {
      "$ref": "featureschema.json"
    },
    "coordRefSys": {
      "$ref": "coordrefsys.json"
    },
    "features": {
      "type": "array",
      "items": {
        "$ref": "feature.json"
      }
    }
  }
}

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{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://beta.schemas.opengis.net/json-fg/feature.json",
  "title": "a JSON-FG Feature",
  "description": "This JSON Schema is part of JSON-FG version 0.2.2",
  "type": "object",
  "required": ["type", "time", "place", "geometry", "properties"],
  "properties": {
    "conformsTo": {
      "$ref": "conformsto.json"
    },
    "type": {
      "type": "string",
      "enum": ["Feature"]
    },
    "id": {
      "oneOf": [
        {
          "type": "number"
        },
        {
          "type": "string"
        }
      ]
    },
    "featureType": {
      "$ref": "featuretype.json"
    },
    "featureSchema": {
      "$ref": "featureschema.json"
    },
    "time": {
      "$ref": "time.json"
    },
    "coordRefSys": {
      "$ref": "coordrefsys.json"
    },
    "place": {
      "$ref": "place.json"
    },
    "geometry": {
      "$ref": "geometry.json"
    },
    "properties": {
      "oneOf": [
        {
          "type": "null"
        },
        {
          "type": "object"
        }
      ]
    }
  }
}

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{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://beta.schemas.opengis.net/json-fg/conformsto.json",
  "title": "the conformsTo member",
  "description": "This JSON Schema is part of JSON-FG version 0.2.2",
  "type": "array",
  "minItems": 1,
  "items": {
    "type": "string"
  }
}

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{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://beta.schemas.opengis.net/json-fg/time.json",
  "title": "the time member",
  "description": "This JSON Schema is part of JSON-FG version 0.2.2",
  "oneOf": [
    {
      "type": "null"
    },
    {
      "type": "object",
      "properties": {
        "date": {
          "$ref": "#/$defs/date"
        },
        "timestamp": {
          "$ref": "#/$defs/timestamp"
        },
        "interval": {
          "$ref": "#/$defs/interval"
        }
      }
    }
  ],
  "$defs": {
    "date": {
      "type": "string",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$"
    },
    "timestamp": {
      "type": "string",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}(?:\\.\\d+)?Z$"
    },
    "interval": {
      "type": "array",
      "minItems": 2,
      "maxItems": 2,
      "items": {
        "oneOf": [
          {
            "$ref": "#/$defs/date"
          },
          {
            "$ref": "#/$defs/timestamp"
          },
          {
            "type": "string",
            "enum": [".."]
          }
        ]
      }
    }
  }
}

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{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://beta.schemas.opengis.net/json-fg/place.json",
  "title": "the place member",
  "description": "This JSON Schema is part of JSON-FG version 0.2.2",
  "oneOf": [
    {
      "type": "null"
    },
    {
      "$ref": "geometry-objects.json#/$defs/Point"
    },
    {
      "$ref": "geometry-objects.json#/$defs/MultiPoint"
    },
    {
      "$ref": "geometry-objects.json#/$defs/LineString"
    },
    {
      "$ref": "geometry-objects.json#/$defs/MultiLineString"
    },
    {
      "$ref": "geometry-objects.json#/$defs/Polygon"
    },
    {
      "$ref": "geometry-objects.json#/$defs/MultiPolygon"
    },
    {
      "$ref": "geometry-objects.json#/$defs/Polyhedron"
    },
    {
      "$ref": "geometry-objects.json#/$defs/MultiPolyhedron"
    },
    {
      "$ref": "geometry-objects.json#/$defs/Prism"
    },
    {
      "$ref": "geometry-objects.json#/$defs/MultiPrism"
    },
    {
      "$ref": "geometry-objects.json#/$defs/CustomGeometry"
    }
  ]
}

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{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://beta.schemas.opengis.net/json-fg/coordrefsys.json",
  "title": "the coordRefSys member",
  "description": "This JSON Schema is part of JSON-FG version 0.2.2",
  "oneOf": [
    {
      "$ref": "#/$defs/single-refsys"
    },
    {
      "type": "array",
      "items": {
        "$ref": "#/$defs/single-refsys"
      },
      "minItems": 2
    }
  ],
  "$defs": {
    "single-refsys": {
      "oneOf": [
        {
          "$ref": "#/$defs/refsys-simpleref"
        },
        {
          "$ref": "#/$defs/refsys-byref"
        },
        {
          "$ref": "#/$defs/refsys-custom"
        }
      ]
    },
    "refsys-simpleref": {
      "type": "string",
      "description": "The value is either a URI or a CURIE."
    },
    "refsys-byref": {
      "type": "object",
      "required": ["type", "href"],
      "properties": {
        "type": {
          "type": "string",
          "enum": ["Reference"]
        },
        "href": {
          "type": "string",
          "description": "The value is either a URI or a CURIE."
        },
        "epoch": {
          "type": "number"
        }
      }
    },
    "refsys-custom": {
      "type": "object",
      "required": ["type"],
      "properties": {
        "type": {
          "type": "string",
          "not": {
            "enum": ["Reference"]
          }
        }
      }
    }
  }
}

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{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://beta.schemas.opengis.net/json-fg/geometry.json",
  "title": "the geometry member",
  "description": "This JSON Schema is part of JSON-FG version 0.2.2",
  "oneOf": [
    {
      "type": "null"
    },
    {
      "$ref": "geometry-objects.json#/$defs/Point"
    },
    {
      "$ref": "geometry-objects.json#/$defs/MultiPoint"
    },
    {
      "$ref": "geometry-objects.json#/$defs/LineString"
    },
    {
      "$ref": "geometry-objects.json#/$defs/MultiLineString"
    },
    {
      "$ref": "geometry-objects.json#/$defs/Polygon"
    },
    {
      "$ref": "geometry-objects.json#/$defs/MultiPolygon"
    },
    {
      "$ref": "geometry-objects.json#/$defs/GeometryCollection"
    }
  ]
}

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{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://beta.schemas.opengis.net/json-fg/geometry-objects.json",
  "title": "the geometry objects",
  "description": "This JSON Schema is part of JSON-FG version 0.2.2",
  "$defs": {
    "CustomGeometry": {
      "title": "A custom geometry object",
      "type": "object",
      "required": ["type"],
      "properties": {
        "type": {
          "type": "string",
          "not": {
            "enum": [
              "Point",
              "MultiPoint",
              "LineString",
              "MultiLineString",
              "Polygon",
              "MultiPolygon",
              "Polyhedron",
              "MultiPolyhedron",
              "Prism",
              "MultiPrism",
              "GeometryCollection"
            ]
          }
        }
      }
    },
    "Point": {
      "title": "GeoJSON Point with additional 'coordRefSys' member",
      "type": "object",
      "required": ["type", "coordinates"],
      "properties": {
        "type": {
          "type": "string",
          "enum": ["Point"]
        },
        "coordRefSys": {
          "$ref": "coordrefsys.json"
        },
        "coordinates": {
          "$ref": "#/$defs/position"
        },
        "bbox": {
          "$ref": "#/$defs/bbox"
        }
      }
    },
    "LineString": {
      "title": "GeoJSON LineString with additional 'coordRefSys' member",
      "type": "object",
      "required": ["type", "coordinates"],
      "properties": {
        "type": {
          "type": "string",
          "enum": ["LineString"]
        },
        "coordRefSys": {
          "$ref": "coordrefsys.json"
        },
        "coordinates": {
          "type": "array",
          "minItems": 2,
          "items": {
            "$ref": "#/$defs/position"
          }
        },
        "bbox": {
          "$ref": "#/$defs/bbox"
        }
      }
    },
    "Polygon": {
      "title": "GeoJSON Polygon with additional 'coordRefSys' member",
      "type": "object",
      "required": ["type", "coordinates"],
      "properties": {
        "type": {
          "type": "string",
          "enum": ["Polygon"]
        },
        "coordRefSys": {
          "$ref": "coordrefsys.json"
        },
        "coordinates": {
          "type": "array",
          "items": {
            "type": "array",
            "minItems": 4,
            "items": {
              "$ref": "#/$defs/position"
            }
          }
        },
        "bbox": {
          "$ref": "#/$defs/bbox"
        }
      }
    },
    "MultiPoint": {
      "title": "GeoJSON MultiPoint with additional 'coordRefSys' member",
      "type": "object",
      "required": ["type", "coordinates"],
      "properties": {
        "type": {
          "type": "string",
          "enum": ["MultiPoint"]
        },
        "coordRefSys": {
          "$ref": "coordrefsys.json"
        },
        "coordinates": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/position"
          }
        },
        "bbox": {
          "$ref": "#/$defs/bbox"
        }
      }
    },
    "MultiLineString": {
      "title": "GeoJSON MultiLineString with additional 'coordRefSys' member",
      "type": "object",
      "required": ["type", "coordinates"],
      "properties": {
        "type": {
          "type": "string",
          "enum": ["MultiLineString"]
        },
        "coordRefSys": {
          "$ref": "coordrefsys.json"
        },
        "coordinates": {
          "type": "array",
          "items": {
            "type": "array",
            "minItems": 2,
            "items": {
              "$ref": "#/$defs/position"
            }
          }
        },
        "bbox": {
          "$ref": "#/$defs/bbox"
        }
      }
    },
    "MultiPolygon": {
      "title": "GeoJSON MultiPolygon with additional 'coordRefSys' member",
      "type": "object",
      "required": ["type", "coordinates"],
      "properties": {
        "type": {
          "type": "string",
          "enum": ["MultiPolygon"]
        },
        "coordRefSys": {
          "$ref": "coordrefsys.json"
        },
        "coordinates": {
          "type": "array",
          "items": {
            "type": "array",
            "items": {
              "type": "array",
              "minItems": 4,
              "items": {
                "$ref": "#/$defs/position"
              }
            }
          }
        },
        "bbox": {
          "$ref": "#/$defs/bbox"
        }
      }
    },
    "Polyhedron": {
      "title": "JSON-FG Polyhedron",
      "type": "object",
      "required": ["type", "coordinates"],
      "properties": {
        "type": {
          "type": "string",
          "enum": ["Polyhedron"]
        },
        "coordRefSys": {
          "$ref": "coordrefsys.json"
        },
        "coordinates": {
          "type": "array",
          "minItems": 1,
          "items": {
            "type": "array",
            "minItems": 1,
            "items": {
              "type": "array",
              "minItems": 1,
              "items": {
                "type": "array",
                "minItems": 4,
                "items": {
                  "$ref": "#/$defs/position3d"
                }
              }
            }
          }
        },
        "bbox": {
          "$ref": "#/$defs/bbox3d"
        }
      }
    },
    "MultiPolyhedron": {
      "title": "JSON-FG MultiPolyhedron",
      "type": "object",
      "required": ["type", "coordinates"],
      "properties": {
        "type": {
          "type": "string",
          "enum": ["MultiPolyhedron"]
        },
        "coordRefSys": {
          "$ref": "coordrefsys.json"
        },
        "coordinates": {
          "type": "array",
          "items": {
            "type": "array",
            "minItems": 1,
            "items": {
              "type": "array",
              "minItems": 1,
              "items": {
                "type": "array",
                "minItems": 1,
                "items": {
                  "type": "array",
                  "minItems": 4,
                  "items": {
                    "$ref": "#/$defs/position3d"
                  }
                }
              }
            }
          }
        },
        "bbox": {
          "$ref": "#/$defs/bbox3d"
        }
      }
    },
    "Prism": {
      "title": "JSON-FG Prism",
      "type": "object",
      "required": ["type","base","upper"],
      "properties": {
        "type": {
          "type": "string",
          "enum": ["Prism"]
        },
        "coordRefSys": {
          "$ref": "coordrefsys.json"
        },
        "base": {
          "oneOf": [
            { "$ref": "#/$defs/Point" },
            { "$ref": "#/$defs/LineString" },
            { "$ref": "#/$defs/Polygon" },
            { "$ref": "#/$defs/MultiPoint" },
            { "$ref": "#/$defs/MultiLineString" },
            { "$ref": "#/$defs/MultiPolygon" }
          ]
        },
        "lower": {
          "type": "number"
        },
        "upper": {
          "type": "number"
        },
        "bbox": {
          "$ref": "#/$defs/bbox3d"
        }
      }
    },
    "MultiPrism": {
      "title": "JSON-FG Multi-Prism",
      "type": "object",
      "required": ["type","prisms"],
      "properties": {
        "type": {
          "type": "string",
          "enum": ["MultiPrism"]
        },
        "coordRefSys": {
          "$ref": "coordrefsys.json"
        },
        "prisms": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/Prism"
          }
        },
        "bbox": {
          "$ref": "#/$defs/bbox3d"
        }
      }
    },
    "GeometryCollection": {
      "title": "GeoJSON GeometryCollection with additional 'coordRefSys' member",
      "type": "object",
      "required": ["type", "geometries"],
      "properties": {
        "type": {
          "type": "string",
          "enum": ["GeometryCollection"]
        },
        "coordRefSys": {
          "$ref": "coordrefsys.json"
        },
        "geometries": {
          "type": "array",
          "items": {
            "oneOf": [
              {
                "$ref": "#/$defs/Point"
              },
              {
                "$ref": "#/$defs/MultiPoint"
              },
              {
                "$ref": "#/$defs/LineString"
              },
              {
                "$ref": "#/$defs/MultiLineString"
              },
              {
                "$ref": "#/$defs/Polygon"
              },
              {
                "$ref": "#/$defs/MultiPolygon"
              }
            ]
          }
        },
        "bbox": {
          "$ref": "#/$defs/bbox"
        }
      }
    },
    "position": {
      "type": "array",
      "minItems": 2,
      "maxItems": 3,
      "items": {
        "type": "number"
      }
    },
    "position3d": {
      "type": "array",
      "minItems": 3,
      "maxItems": 3,
      "items": {
        "type": "number"
      }
    },
    "bbox": {
      "oneOf": [
        {
          "$ref": "#/$defs/bbox2d"
        },
        {
          "$ref": "#/$defs/bbox3d"
        }
      ]
    },
    "bbox2d": {
      "type": "array",
      "minItems": 4,
      "maxItems": 4,
      "items": {
        "type": "number"
      }
    },
    "bbox3d": {
      "type": "array",
      "minItems": 6,
      "maxItems": 6,
      "items": {
        "type": "number"
      }
    }
  }
}

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{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://beta.schemas.opengis.net/json-fg/featuretype.json",
  "title": "the featureType member",
  "description": "This JSON Schema is part of JSON-FG version 0.2.2",
  "oneOf": [
    {
      "type": "string"
    },
    {
      "type": "array",
      "items": {
        "type": "string"
      }
    }
  ]
}

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{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://beta.schemas.opengis.net/json-fg/featureschema.json",
  "title": "the featureSchema member",
  "description": "This JSON Schema is part of JSON-FG version 0.2.2",
  "oneOf": [
    {"type": "string", "format": "uri"},
    {
      "type": "object",
      "additionalProperties": {"type": "string", "format": "uri"}
    }
  ]
}