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Just rename the extension on your files to either .log or .nmea, quote: As of Google Earth release 5.2 (Free and pro versions) now supports NMEA import (.log and .nmea files). You can also try some sites online that perform the nmea2kml conversions. This www.gpsvisualizer.com site looks promising: Click on the link above Add your NMEA log ...


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Another source for google may be Zonum. Here you can generate points with elevation data and then generate interpolated surface. For USA you may try National Map Viewer If you want to develop google api app yourself just modify the following file with your Google Map Api Key see image -- and save the file as html and open in browser that's all. ...


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The Google Elevation API is not accurate enough at a Building level. You can test it out by using going to http://www.daftlogic.com/sandbox-google-maps-find-altitude.htm Just search for 1 World Trade Center, New York, NY 10007 and then click around, and you'll see that the heights that you get aren't really for the top of a building


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Alternatively, a DEM with global coverage that might suit you is the SRTM 1 second DEM. This was recently released and has a resolution of about 30 metres. Read about it at http://www2.jpl.nasa.gov/srtm/ and download load it (free) at http://earthexplorer.usgs.gov/.


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As I understand it, according to the Google Maps/Earth Additional Terms of Service you cant't as this would be considered "derivative works of the Content". "Unless you have received prior written authorization from Google (or, as applicable, from the provider of particular Content), you must not: (a) copy, translate, modify, or make derivative works of the ...



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