hello billy, fellow surveyors and my friends: 

when I export cad lines to google earth I am getting an offset error of 5 meter why

why rtk position not matching with google earth?

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Dear Raymond
What is the final product you are looking for?

If you want to do a kind of urban cartography with google earth, it will be very low accuracy.

Best

SIR JUST I WANT TO OVERLAY THE CAD LINES WITH IN 1 OR 2 M ACCURACY

Raymond

There is no way to ashive that precision. Try with comercial images.

Hi, Raymond.  Most of these replies are correct - Google Earth is not survey quality imagery.  The satellite swaths they acquire are wide range & relatively low resolution for speed and cost, so what happens is that if you're generating data on a known coordinate system that happens to fall directly below the satellite path, it will rectify very well.  But the further your data happens to be from that directly under that path, the more dramatic the distortion of the image.

I use an older version (2012) of Civil 3D to do these image drapes.  I set your dwg to  UTM WGS84 Zone 37N and the CAD came in to GE exactly where yours does.  So I physically moved all of your data in CAD 7.0m west and 5.0m north and got the following (attached).

Looks pretty but I wouldn't design much off of it.

Bottom line is: what you've done is as good as it gets with Google, but you can man handle it if you want.

files attached

Hello,Raymond,  Check this search page out. https://www.google.com/search?client=opera&q=export+autocad+lin...

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