[Server] The RFC 7946 GeoJSON specification recommends limiting coordinate precision to 6

Author: rldhont

src/core/qgsjsonutils.h

@@ -38,11 +38,13 @@ class CORE_EXPORT QgsJSONExporter
 
     /** Constructor for QgsJSONExporter.
      * @param vectorLayer associated vector layer (required for related attribute export)
-     * @param precision maximum number of decimal places to use for geometry coordinates
+     * @param precision maximum number of decimal places to use for geometry coordinates,
+     *  the RFC 7946 GeoJSON specification recommends limiting coordinate precision to 6
      */
-    QgsJSONExporter( const QgsVectorLayer* vectorLayer = nullptr, int precision = 17 );
+    QgsJSONExporter( const QgsVectorLayer* vectorLayer = nullptr, int precision = 6 );
 
     /** Sets the maximum number of decimal places to use in geometry coordinates.
+     * The RFC 7946 GeoJSON specification recommends limiting coordinate precision to 6
      * @param precision number of decimal places
      * @see precision()
      */

src/server/qgswfsserver.cpp

@@ -1913,7 +1913,10 @@ QString QgsWFSServer::createFeatureGeoJSON( QgsFeature* feat, int prec, QgsCoord
 
   QgsJSONExporter exporter;
   exporter.setSourceCrs( crs );
-  exporter.setPrecision( prec );
+  //QgsJSONExporter force transform geometry to ESPG:4326
+  //and the RFC 7946 GeoJSON specification recommends limiting coordinate precision to 6
+  Q_UNUSED( prec );
+  //exporter.setPrecision( prec );
 
   //copy feature so we can modify its geometry as required
   QgsFeature f( *feat );