Mobo, by any chance? It has a section of this forum all to it's own. It can use screendumps of SH3,4,5 as a medium to transfer plots to Mobo. And from that make vector calculations in it. But doesn't use the map tools directly, or I may misunderstand you.
This is it:
http://www.subsim.com/radioroom/forumdisplay.php?f=225