What you should know about OpenStreetMap maps

• geographic data is organized in xml-files
• a renderer is an application that assembles map-pictures out of the xml-database, each of which is 256x256 in size

• the path to the picture is build as follows:   http://tile.openstreetmap.org/15/17567/10430.png

         name of the server / zoomlevel / tile x-coord. / tile y-coord.

• the maps look different if downloaded from another tile-server
• you can build tiles by your own. see Kosmos-renderer.
• the png-fies have to be converted to prm-fileformat as primer2 can not directly diaplay png-pictures.
• if the above example has been converted to prm-format it must be saved on the micro sdcard. the directory structure has to be kept

         /15/17567/10430.rpm