Look into Quantum GIS. It's an opensource tool that will let you do what you want (and more). A fair bit more flexible than Google Earth.
Most geographic charts and images are in formats that include a locations/scale/alignment. Mixing different coordinate systems (global vs uk local ones) needs the right settings. Good luck!
If you are looking to graphically align non-geostamped images, you should be able to figure out their corners by comparing them to a map with a known coordinate system, then use a .world file to specify that location stamp before importing them to Quantum GIS or whatever you use.
if the input data are georeferenced correctly then qgis will happily transform all layers to a common reference system if you check "on-the-fly" in the properties.
Comments
Look into Quantum GIS. It's an opensource tool that will let you do what you want (and more). A fair bit more flexible than Google Earth.
Most geographic charts and images are in formats that include a locations/scale/alignment. Mixing different coordinate systems (global vs uk local ones) needs the right settings. Good luck!
If you are looking to graphically align non-geostamped images, you should be able to figure out their corners by comparing them to a map with a known coordinate system, then use a .world file to specify that location stamp before importing them to Quantum GIS or whatever you use.
if the input data are georeferenced correctly then qgis will happily transform all layers to a common reference system if you check "on-the-fly" in the properties.