Test it
If you want to prove it to yourself, shoot in a surface feature that is visible from Google Earth and compare the shift when you plot the point.
Test it
Andy, I've already taken those measures. See my original post.
GE does very little to actually rectify imagery.In the more urban areas, they frequently have aerial photography, in more rural areas they use satellite photography. Each of these has been rectified differently and you may see much larger errors on the satellite images, especially if you are near the edges of the photo.
Try this with the client. Import your drawing into GE, or if you cannot do that use the path tool in GE and trace the fence or house or whatever. Then go to the historical images button on the toolbar (looks like a clock). As you toggle through past images you will see the line remain static in one position, but the images will shift a bit. In urban areas I typically see 3 to 10 feet of shift. In rural areas I frequently see 20 to 50 feet of shift. This is useful to show the client that GE is hit or miss, while your survey is actually tied to a single location in the real world.
Point 57
I listed out about 1.5' from the point to the T in GE. This is at Elev 58.61 NAVD and it is in my cul de sac.
Point 57
Never noticed around here, but maybe 5 years ago was looking for something on Big Island and found about 150' error. It may be fixed by now.
Like everything else, it's no better the info entered into it. GIGO.
Point 57
I usually find GE to be nearly right on, depending how close you are to a missile silo. :-O
Pablo B-)
