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Encode ol.geom.Circles as empty geometry collections in GeoJSON

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GeoJSON does not support circles, nor null geometries.  Empty geometry
collections seem to be the way to represent at null geometry in GeoJSON.
This commit is contained in:
Tom Payne
2014-01-13 12:45:45 +01:00
parent 5886d0dec0
commit 99eca3037d
2 changed files with 26 additions and 1 deletions
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16
src/ol/format/geojsonformat.js
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@@ -153,6 +153,19 @@ ol.format.GeoJSON.writeGeometry_ = function(geometry) {
};
/**
* @param {ol.geom.Geometry} geometry Geometry.
* @private
* @return {GeoJSONGeometryCollection} Empty GeoJSON geometry collection.
*/
ol.format.GeoJSON.writeEmptyGeometryCollectionGeometry_ = function(geometry) {
return /** @type {GeoJSONGeometryCollection} */ ({
'type': 'GeometryCollection',
'geometries': []
});
};
/**
* @param {ol.geom.Geometry} geometry Geometry.
* @private
@@ -283,7 +296,8 @@ ol.format.GeoJSON.GEOMETRY_WRITERS_ = {
'MultiPoint': ol.format.GeoJSON.writeMultiPointGeometry_,
'MultiLineString': ol.format.GeoJSON.writeMultiLineStringGeometry_,
'MultiPolygon': ol.format.GeoJSON.writeMultiPolygonGeometry_,
'GeometryCollection': ol.format.GeoJSON.writeGeometryCollectionGeometry_
'GeometryCollection': ol.format.GeoJSON.writeGeometryCollectionGeometry_,
'Circle': ol.format.GeoJSON.writeEmptyGeometryCollectionGeometry_
};