New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Vector tile issues with polygons... #5626

sdlime opened this Issue Jul 5, 2018 · 2 comments


None yet
1 participant

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.


@sdlime sdlime self-assigned this Jul 5, 2018

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


This comment has been minimized.


sdlime commented Jul 5, 2018

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


This comment has been minimized.


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

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment