Hello. I noticed that the "Link to this page" link on the map-style indexes doesn't keep track of all parameters; it doesn't remember the map type (satellite, hybrid, or normal), and if you've zoomed or scrolled the map at all then it forgets the category/locale that you were indexing.
I attach a fix - there are patches to both OpenGuides.pm and templates/map_index.tt
You'll end up with URLs looking something like: http://london.randomness.org.uk/wiki.cgi?action=index;format=map;long=-0.056...
Kake