more open source georeferencing links

http://warper.geothings.net
http://www.maptiler.org
http://geo.nls.uk/urbhist/index
http://www.georeferencer.org

The following is a googlearth - warper mashup using 1794 and 1831 maps of Manchester. I've found warper a quick and easy way of geo referencing old maps - much easier than ArcGIS. The resolution on the maps isn't brilliant, but they are correctly geo-referenced. I'm still working out how to tile the maps and display layers sequentially.

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