back start next

Maps

Cumulus uses the following sets of maps:

The maps are installed in different places depending on the used device:

OS Map root directory
Linux Desktop $HOME/Cumulus/maps
Maemo $HOME/MyDocs/Cumulus/maps
Android /sdcard/Cumulus/maps (internal or external SD-card)

These are the default locations.

On the Nokia Internet Tablet you should use an external storage medium if possible, because the internal file system is limited in its capacity. At the first startup on the Nokia Internet Tablet, Cumulus itself tries to discover the best location for storing the map files. The following places are checked for existence in chronological order:

The first match is taken and the necessary subdirectories are created by Cumulus itself.

Please note! The map files have to be stored in different subdirectories under the root map path.

Directory Map kind
.../maps/landscape The ground and terrain data files
.../maps/points POI data files like airfields, outlandings, navaids and hotspots
.../maps/airspaces The airspace files

If you want to install the maps elsewhere than the known locations, you must give the path to the new map root directory on the Map Settings configuration page. Use the Maps button to navigate to the appropriate root directory under which the expected maps' subdirectories are to be found.

Note! Under Android you cannot change the map root directory.

Only load the point data and the airspace maps for the area you need. This will make Cumulus faster and save runtime memory. If you experience memory problems running Cumulus, you can choose not to install certain map sets. You could, for instance, skip the terrain maps. This will disable the display of terrain features (the isolines) but it will also save memory and reduce the time used for map loading and drawing. It is advisable to use at least the Ground maps because otherwise you will end up with a blue background, which is not very helpful for navigation.

The maps you install are not projected. This work is done on loading. Because this is a computationally complex operation, the resulting maps are stored again with a .kfc, .aic or .txc extension. For many maps, these files are a bit smaller than the original files. The next time Cumulus needs to load the file, it first tries to load this compiled file to improve speed. In the Map Settings page you can modify the behaviour of Cumulus for map projection and map compilation.

back start next