beijing dd 115.637 39.247 117.099 40.408 255 255 255 600 800 roads /gis/beijing/roads.shp 120 120 120 120 120 120 true true buildings /gis/beijing/buildings.shp 200 200 200 200 200 200 true true natural /gis/beijing/natural.shp 127 255 197 0 255 0 true true railways /gis/beijing/railways.shp 0 19 127 0 19 127 true true waterways /gis/beijing/waterways.shp 0 148 255 0 148 255 true true