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pole holes: raster reprojections make ozone holes in the poles #4864

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dshorthouse opened this issue Feb 13, 2014 · 7 comments
Closed

pole holes: raster reprojections make ozone holes in the poles #4864

dshorthouse opened this issue Feb 13, 2014 · 7 comments

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@dshorthouse
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@dshorthouse dshorthouse commented Feb 13, 2014

Example: http://www.simplemappr.net/map/1579 [not apparent here because patch below already applied]

I had a patch for this in MapServer 5, which might be reworked to solve the same artifact in MapServer 6. https://github.com/dshorthouse/SimpleMappr/blob/4cad6dd9724e3d59d5046c0a18b137ca5a10f80f/patches/mapserver_polehole.patch

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@sdlime sdlime commented Feb 13, 2014

@warmerdam, any chance you could review the base patch? More your area of expertise... --Steve

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@dshorthouse dshorthouse commented Mar 4, 2014

@sdlime @warmerdam Will that patch for MapServer 5 be helpful?

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@sdlime sdlime commented Mar 11, 2014

@dshorthouse, I've not been able to get any feedback. So, assuming life was good for you with this patch in 5.x that we should move forward and create a patch against git master and apply it there.

Steve

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@warmerdam warmerdam commented Mar 11, 2014

The approach looks generally plausible though I haven't done an in depth review.

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@dshorthouse dshorthouse commented Nov 13, 2014

I'd apply this patch myself, but it's not my area of expertise. @warmerdam have you had a chance to review?

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@dshorthouse dshorthouse commented Dec 9, 2015

Anyone?

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@dshorthouse dshorthouse commented Nov 8, 2016

This is still an issue with MapServer 7.02

dshorthouse added a commit to dshorthouse/mapserver that referenced this issue Dec 13, 2016
Repeat transformation for a rectangle interior to the output requested region. If the latter results in a more extreme y extent, then extend extents in source layer projection to southern/northing bounds and entire x extent. This fix resolves issue mapserver#4864.
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