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MapTiler is graphical application for online map publishing. Your map can create overlay of standard maps like Google Maps, Yahoo Maps, Microsoft VirtualEarth or OpenStreetMap and can be also visualized in 3D form by Google Earth. Only thing you have to do for publishing the map is to upload the automatically generated directory with tiles into your webserver.
Supported files for conversion: TIFF/GeoTIFF, MrSID, ECW, JPEG2000, Erdas HFA, NOAA BSB, JPEG and more...
MapTiler is graphical interface for GDAL2Tiles utility, which is part of GDAL.
Learn more about the MapTiler Cluster.

Overlay of Google Maps
Google Earth embedded in browser
KML for Google Earth
Source file: USGS DRG maps

Victoria BC: NOAA Navigational Chart
Overlay of Google Maps, Virtual Earth, Yahoo Maps, OpenStreetMap and OpenAerialMap
Source file:NOAA RNCs
Description of Google Maps Projection and Coordinate system | Google Maps Opacity Control
In case you need to generate tile overlay from vectors/shape files you can also use projects like CASA GMapCreator or Mapnik. Useful can be also GHeat
WMS server can also provide a data for tile overlay for Google Maps/Earth check projects TileCache.org or GeoWebCache.org.
Copyright © 2008 Klokan Petr Přidal
Based on GDAL and GDAL2Tiles utility, which was supported by Google Summer of Code.