Using Google Earth's elevations of terrains to create a 3D model

Does anyone know of a way to pull the elevations of terrains off of Google Earth and Import them into a program that will run a CNC machine?For example, is there a way to make a 3D model of the land that I live on using Google Earths elevations?  I am looking for an relativity exact model of my land including all hills, canyons, and so forth.
Thanks in advance

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Use the USGS system instead, and download elevation data directly, in pre-formatted tables - the USGS GUI isn't dissimilar to GMaps, zoom in on the area of interest, and then download the resulting files, selected from the National Dataset.

Converting into a CNC model will be interesting - there is a tool in LinuxEMC for it.

armynavy17 (author)  steveastrouk6 years ago
That seems like a viable option; however, how would I obtain the pre-formatted tables from the USGS. I have looked on their website and have only found NED information (National Elevation Dataset), but it doesn't have and tables of data as far as I can see.
Found ?

armynavy17 (author)  steveastrouk6 years ago
Ok, so then the file I download from that is used by LinuxEMC? I would look myself, but I am still working on getting the live usb to work.
You get a ZIP file with your data in there, there are programs like Terragen that can read the data for you and reprocess it.

armynavy17 (author)  steveastrouk6 years ago
Ok, I'll have to look into it more. I've downloaded both Terragen Classic and Terragen 2 and haven't found a way to import any of the files in the Zip file I got so I'll have to look around some more. Thanks for the help so far.
SORRY ! Looks like I used VTbuilder to get the files into the system. If you can export the terrain map in false colour, processing it to tool height should be straightforward I'd've thought - the EMC tool should do that for you.

armynavy17 (author)  steveastrouk6 years ago
Thank you so much for your help. So just to get this straight, I download the NED Shaded Relief map of the area from the USGS site you provided. Then, I load it into VTbuilder and export it in false colour(I assume this is an option in the program). Lastly, I pull the file exported in false colour into LinuxEMC to run the CNC machine. Does this all sound right?
OK, this is gospel, because I just did it, apart from the EMC bit

Open VTbuilder
Create new project.
Select "elevation" "import data"
Open directory containing unzipped USGS data
(see data on screen, fly over it with the excellent VTEnviro program)
Export data to XYZ ascii data - which, with a bit of buggering around is all you need for something like linux EMC, or, if you really know how to write code, you can generate NC data directly - I don't recommend it though ;-)

.....Use Meshlab to turn the XYZ to a .STL surface model, then use THAT in PyCam to generate tool paths.......