You can also write a custom projection for your coordinate system
http://code.google.com/apis/maps/documentation/javascript/maptypes.html#Projections
This is an example how to 'misuse' Maps API by Marcelo:
http://maps.forum.nu/gm_function_plotter.html
Note that is an old example using v2 syntax
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Thanks! Also, is there a way to do graph visualization using google
maps? (i.e. if you have a list of nodes and edges and a custom
(blank) map, can you layout the nodes and edges in an organized planar
view without specifying actual latitude/longitude?)
I assume this functionality is not built i