Function SpatialObjectToGeoJSON

pkg/geo/encode.go:111–156

SpatialObjectToGeoJSON transforms a given SpatialObject to GeoJSON.

(
	so geopb.SpatialObject, maxDecimalDigits int, flag SpatialObjectToGeoJSONFlag,
)

// SpatialObjectToGeoJSON transforms a given SpatialObject to GeoJSON.
func SpatialObjectToGeoJSON(
	so geopb.SpatialObject, maxDecimalDigits int, flag SpatialObjectToGeoJSONFlag,
) ([]byte, error) {
	t, err := ewkb.Unmarshal([]byte(so.EWKB))
	if err != nil {
		return nil, err
	}
	options := []geojson.EncodeGeometryOption{
		geojson.EncodeGeometryWithMaxDecimalDigits(maxDecimalDigits),
	}
	if flag&SpatialObjectToGeoJSONFlagIncludeBBox != 0 {
		// Do not encoding empty bounding boxes.
		if so.BoundingBox != nil {
			options = append(
				options,
				geojson.EncodeGeometryWithBBox(),
			)
		}
	}
	// Take CRS flag in order of precedence.
	if t.SRID() != 0 {
		if flag&SpatialObjectToGeoJSONFlagLongCRS != 0 {
			crs, err := geomToGeoJSONCRS(t, true /* long */)
			if err != nil {
				return nil, err
			}
			options = append(options, geojson.EncodeGeometryWithCRS(crs))
		} else if flag&SpatialObjectToGeoJSONFlagShortCRS != 0 {
			crs, err := geomToGeoJSONCRS(t, false /* long */)
			if err != nil {
				return nil, err
			}
			options = append(options, geojson.EncodeGeometryWithCRS(crs))
		} else if flag&SpatialObjectToGeoJSONFlagShortCRSIfNot4326 != 0 {
			if t.SRID() != 4326 {
				crs, err := geomToGeoJSONCRS(t, false /* long */)
				if err != nil {
					return nil, err
				}
				options = append(options, geojson.EncodeGeometryWithCRS(crs))
			}
		}
	}

	return geojson.Marshal(t, options...)
}

// SpatialObjectToWKBHex transforms a given SpatialObject to WKBHex.
func SpatialObjectToWKBHex(so geopb.SpatialObject) (string, error) {