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Vector tile issues with polygons... #5626

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sdlime opened this Issue Jul 5, 2018 · 2 comments

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sdlime commented Jul 5, 2018

Found the MapBox vtzero project and have been doing some validation on the new driver output that really need to be resolved before releasing 7.2:

  • there's an issue with ring orientation on polygons w/holes. Likely related to the Y axis being flipped in the grid and the computation of clockwise/counter-clockwise.
  • the last point of a polygon (same as the first) need not be output.
  • need to do better detecting degenerate rings, simply checking the number of points doesn't seem to be good enough.

--Steve

@sdlime sdlime self-assigned this Jul 5, 2018

@sdlime sdlime added this to the 7.2 Release milestone Jul 5, 2018

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sdlime commented Jul 5, 2018

Note that the last two generate warnings, however the first one leads to incorrect rendering depending on client.

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sdlime commented Jul 23, 2018

Fixed, closing...

@sdlime sdlime closed this Jul 23, 2018

geographika added a commit to geographika/mapserver that referenced this issue Aug 18, 2018

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