free 3d gps software download:3D Route Builder
3D Route Builder is a powerful GPS editor for fine grain control over paths directly in Google Earth. These can then be either built from scratch or based on existing KML/KMZ, GPX or Garmin Training Center TCX (Edge and Forerunner 305). They can then be retraced at scalable real time speed.
* Fine grain, live control over 3D paths in Google Earth – compliments the built-in Path Editor
* Google Earth embedded in 3D Route Builder
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