Making Image Overlays Easy with GGroundOverlay and GGeoXML (via) Surprisingly, there doesn’t appear to be a good online tool for helping align an overlay image with a Google Map and exporting the result as a KML file. This is the best I could find—Yahoo! used to have a tool called MapMixer but it doesn’t seem to exist any more.
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You can overlay images in Google Earth too, then export the KML to use with google maps. That's how we got the bounding boxes for the historical charts in our North West Passage exhibit eg. http://www.nmm.ac.uk/visit/exhibitions/on-display/ north-west-passage/expeditions/robert-mcclure-1850 -54/
Incidentally, I found from the NWP charts that google maps overlays don't seem to work if the bounding box crosses 180 degrees longitude. We had a chart of the Bering Strait which would not overlay on google maps.
Jim O'Donnell - 31st July 2009 12:36 - #