The best (and often only) way to get ...
... if there would be somewhere a hint about the source/origin. I was not aware that usermap is an integral part of dokuwiki ;-)
There is no description about (or at least I did not find anything in dokuwiki and forum).
However, thank you very much for writing the report. Next time it would be sufficient to write that it is part of DW and the report can be opened there. Do you know more about the source ? I would be interested what this nice module is based of.