Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Le 30/06/2022 à 18:53, John Caron a écrit :
BTW, grid_north_pole_longitude = 180.0 may be a mathematically degenerate case, giving spurious results. something to look at closer. perhaps Martin knows?In the particular case where grid_north_pole_latitude is 90°, indeed I think it degenerate (I would need to test for making sure). Which leads me to the second issue:
It looks like an identity transform to me. Above parameters said that we relocate the pole at 90°N 0°E, which means that we do not move the pole at all. Looking at the equations, they indeed seem to simplify to "output = input". Again I would need to test for making sure (just did the math in my head, I almost always do mistakes in those cases).<variable name="rotated_pole" shape="" type="char"><attribute name="grid_mapping_name" value="rotated_latitude_longitude" /><attribute name="grid_north_pole_longitude" type="float" value="0.0" /> <attribute name="grid_north_pole_latitude" type="float" value="90.0" /> </variable>
Martin
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