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Google earth accuracy

 
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  #1  
Old 11-14-2009, 12:17 PM
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Location: cedar rapids Iowa
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Google earth accuracy

Anbody have an idea how accurate the measuring point to point on Google Earth is? At our lodge we can see deer on a neighbors posted property acrossed the valley. Can't reach that far with our range finders and we have a ongoing discussion of how far it is. Thought I would use Google Earth and their measuring system if it is accurate. Thanks
Russ
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  #2  
Old 11-14-2009, 12:21 PM
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Re: Google earth accuracy

The .mil uses it as an imagery source. The coordinates are very accurate, and the measuring tool is only an algorithm comparing two coordinate sets. I think it could be used to settle your debate.
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  #3  
Old 11-14-2009, 01:58 PM
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Re: Google earth accuracy

Good, I win by 100 yds. Thanks
Russ
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  #4  
Old 11-18-2009, 11:24 PM
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Re: Google earth accuracy

The distance measurements in Google Earth are pretty accurate. Altitude measurements and the 3D depiction of terrain are limited to the accuracy of the source DEM (digital elevation models) - typically obtained from USGS and NASA. For the U.S. that should typically be DEMs that are based off a 10-meter sampling grid. Elevations may be off by 1-2 meters and anything in between sample points has to be interpolated. Still, you can come close enough for most uses.
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  #5  
Old 11-19-2009, 12:30 PM
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Re: Google earth accuracy

MapMyRun.com -

Try this link, they use google maps and you can set way points and measure the distance out or out and back. Its more of a fitness thing, but it works pretty well for distance.
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  #6  
Old 01-04-2010, 10:16 PM
SWN SWN is offline
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Re: Google earth accuracy

Today at work my task was to map various waypoints pertinant to our line of work. I GPS'ed about 50 with no problem. I had 5 spots that I could not access due to weather and a large body of water(our bay). I thought, how bout Google Earth. Fired it up, zoomed in on my 5 targets(which are very visable from the sat), jotted down the long and lat for each site. Cool, finished. Drove out to the area to check it out, each of the 5 waypoints from Google earth missed by up to a quarter mile or so. So bad that I could actually drive to one of the sites that is 300+ feet out in the water. Kinda makes you wonder.
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  #7  
Old 01-05-2010, 02:50 PM
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Re: Google earth accuracy

Quote:
Originally Posted by SWN View Post
Today at work my task was to map various waypoints pertinant to our line of work. I GPS'ed about 50 with no problem. I had 5 spots that I could not access due to weather and a large body of water(our bay). I thought, how bout Google Earth. Fired it up, zoomed in on my 5 targets(which are very visable from the sat), jotted down the long and lat for each site. Cool, finished. Drove out to the area to check it out, each of the 5 waypoints from Google earth missed by up to a quarter mile or so. So bad that I could actually drive to one of the sites that is 300+ feet out in the water. Kinda makes you wonder.
Verify that both your GPS and Google Earth are using the same coordinate system. I believe GE uses the WGS 84 datum.
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