OSM與商業圖資比較
Dennis Zielstra and Hartwig H. Hochmair, Free versus Proprietary:Digital Street Data, GIM Magazine Vol. 25, No. 7(July 2011)。
下載全文PDF。
Categories: OpenStreetMap
Dennis Zielstra and Hartwig H. Hochmair, Free versus Proprietary:Digital Street Data, GIM Magazine Vol. 25, No. 7(July 2011)。
下載全文PDF。