3

I would like to use the projection being used in this figure. Does anyone know which one it is? Esp helpful if it is available in ArcGIS.
From plant stress page

http://www.nasa.gov/images/content/711179main1_drought_ESI-2011-226x.JPG

thanks!

  • 3
    What was the context in which you found this image? – nmpeterson Feb 14 '14 at 19:28
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    The white corners tell me this is cut from a circular projection. You might look at the equatorial azimuthal projections. Could be an equal area azimuthal centered at 0 N 90 W. – brenth Feb 14 '14 at 20:39
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    A high-res version of this (2 MB TIFF) can be seen at svs.gsfc.nasa.gov/vis/a000000/a004000/a004015/…. This image is more extensive and verifies @brenth's observation that the boundaries are circular. It pretty clearly is not an equal area projection, however. – whuber Feb 14 '14 at 20:49
3

The attached screenshot is an exported map from ArcGlobe, which uses a cube projection.

enter image description here

  • Nice try--but this does not match the original image. (Overlay them and see.) – whuber Feb 14 '14 at 20:28
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    @whuber: The discrepancy may just result from differing center points. The NASA image map, assuming it is azimuthal, appears to be centered just off the south coast of Texas. If the here proposed "cube projection" (or any other candidate projection) were redone using the same center point, we may get a much better match. – Martin F Feb 14 '14 at 21:13
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    @whuber the distortion you are observing is simply a matter of rotation within ArcGlobe. I suspect martin is correct in that the maps are centered differently. – Aaron Feb 14 '14 at 21:39
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    Thank you, and I do not doubt you may be correct: nevertheless, no answer here will be convincing unless it is supported by some actual comparison. It's easy to guess but difficult to guess correctly. – whuber Feb 14 '14 at 22:25
  • @user1186 or aaron: Can we see a new overlay (after rotation)? – Martin F Feb 15 '14 at 21:22

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