PUBLIC MARKS with tags software & maps

Frappr is an online tool that lets you map out a city. You can also share photos, private message them, or leave comments on their MyFrappr homepage. My city is invalid! What gives? Make sure you use the autocomplete popup box that shows up after you type a few letters. Then try alternate spellings (eg. St. vs Saint). If your city is small (pop. under 500) or new, it probably isn't in our database. We're also getting a lot of reports of missing Canadian, Australian, and Middle Eastern cities. Add to the City Request list.

Integrating Google Maps into Your Web Applications

Le Petit Poucet is free software to display and edit GPS routes and tracks in a 3D scene

TopoFusion is GPS Mapping software for Windows. It downloads maps (Topo, Aerial Photo and Satellite) automatically from Microsoft's TerraServer and NASA's OnEarth server, storing them on the hard drive for offline use.

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Google推出的GIS衛星空照軟體(free)

similar to Google Earth. with added real-time weather plug-ins and 'blue marble' overlay for true seasonal colors, but not as many good high-rez satellite imagery as Google Earth.