5.2 Map out of a "raster image"

In case you have a picture representing a map, SportWatcher needs geographical reference points. Formats like PNG (Portable Network Graphics), BMP (Bitmap), GIF (Graphics Image Format), and so on, are called raster images.

First, you have to find a map of the wanted area in the wanted resolution. Once this is done, you must find out the geodetic date of th map. This may be difficult, but is absolutely needed!

Once this is also done, you should know the upper left and the lower right corner in geographical coordinates. With all this informations, you can start to enter the needed parameters. Part 4.1.3.6 Map file let you define the path to the map and the file name of the map. With 4.1.3.7 Map type you can define the type of the map. Now most of the work is done.

Now only the definations of the corners is left. Look at 4.2.2 Image Coordinates for an explanation of how to do that. Once this is done, SportWatcher should display a map underneath the track.

The map must not have exactly the size of the track. In fact it should be bigger (maybe a lot bigger). I recomend to find a map about your whole training area. SportWatcher will cut the needed piece and stretch and push it to fit into the given drawing space.


5.1 WMS Server 5.3 Shape files

© 2006 − 2011 by Andreas Theofilu (theosys)