VISUM can store count positions, and optionally, their values. As count positions may be extended by user attributes, we have set up a small script which extracts both, the positions, and the user attributes, and fixes the positions on the given network. The tool is named "visum_parseZaehlstelle.py" and can be found in <SUMO_HOME>\tools\import\visum. The call is:
visum_parseZaehlstelle.py <SUMO-net> <VISUM-net> <output>
This means that you have to give both, the converted, and the original net to this tool. <output> is the name of the output file to generate. The tool converts the "ZAEHLSTELLE" elements into a list of pois, located at the first (rightmost) lanes of the network; these can be used as additional Polygons and POIs within the Simulation.