planewood Posted March 23, 2006 Share Posted March 23, 2006 I have a large jpg file created by USAPhotomaps that covers about 2 miles x 2 miles at 1 meter resolution. All the lat/longs or UTM's check out perfect with USAPhotomaps. They are as close as I can read off my maps and surveyed locations. When I use Google Earth to overlay this jpg file I'm getting some distortion. The bottom of the JPG files is lined up great in the N/S & E/S directions. The south section line lines up exactly as do the SW & SE section corners (the GE lat/lons read what they should read at the known points). But, the top of the jpg is skewed right by about 70'. The skewing gets progressively worse from bottom to top. Another way to look at it is that the waypoints at the top are plotting about 70' west of where they should relative to the overlayed jpg file. Nothing is said in GE about the type of projection or datum their using. I wonder if that is the cause? Anyone encountered this before? Quote Link to comment
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