For some operations, MATSim must know about the coordinate system your data is in. For example, If you want to generate kml-Output for Counts-Validation, MATSim has to convert the coordinates in your network to WGS84, the coordinate system used by Google Earth.
You can specify the coordinate system in the config-file:
<module name="global"> <param name="coordinateSystem" value="CH1903LV1903" /> </module>
The value specified for the coordinateSystem parameter can be:
Atlantisstands for an artificial coordinate system which maps our examples without relation to the real world somewhere in to the Atlantic ocean.
As the distance calculation in WGS84-coordinates (or any spherical coordinates) is rather complex (a simple Pythagoras is not enough), we advise people to use a Cartesian coordinate systems, preferable where one unit corresponds to one meter. Using such a coordinate system is a pre-requisit if one wants to use the optimized A*Landmarks-Router in MATSim.