Hi Ben,
the patch works very good! Thank you! And the hammer projection equatations in wikipedea are correct.
kind regards
Matthias
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Am 17/11/10, schrieb Benjamin Root <ben.root@...1304...>:
On Wed, Nov 17, 2010 at 8:44 AM, Benjamin Root <ben.root@...1304... <ben.root@...1304...>> wrote:
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> On Wed, Nov 17, 2010 at 5:45 AM, Matthias Plum <plum@...669...(javascript:main.compose()> wrote:
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> > Hi
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> > I am trying to plot data on the sphere and use the hammer projection.
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> > The data ploting works fine, but the angular grid isn't shown correctly.
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> > In the attached picture you can see the error(mouse pointer is on the
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> > position 60 E 30 S). Can anyone help me on this subject? Thanks.
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> > Matthias
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> Matthias,
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> Looking at the transform equation for Hammer, it looks like there might be a mistake in the calculation. Can you include the script you used to make that figure so I can test the fix?
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> Thanks,
> Ben Root
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>Nevermind about the example script, I tested it myself and verified the problem. The fix was simple. We were missing a square root for the denominator of the formula for x and y. Before I submit this patch, can anybody with more knowledge about the hammer projection verify that the equations on the wikipedia page are correct? I would like to verify the transformation before making this change.
Ben Root