mapbox / mapbox/tippecanoe

White gaps and overlaps

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C++
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Description

Hi, I've got a small problem with overlapping tiles and white "blank" spaces, there might be a flag option I'm missing that would fix this issue.

When I run plain tippecanoe command, without and additional flags except "-z14" and "-pk" , I get this:

example1

When I run "tippecanoe -z14 -D8 -aL -b10 -o file.mbtiles --force" , I get much better results but overlaps appear and some blank spaces are transformed into polygons :

example2

I have tried "-ab", "-g2", "-pc", "-pD" flags but without luck since it gives same or worse results.

Also, is it possible to automatically interpolate blank spaces with same values that surrounding features have?

Thanks a world!

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the two command lines in the issue, comparing the plain -z14 -pk run with the -D8 -aL -b10 run and the other flags tried. Investigate the resulting tile gaps, overlaps, and polygons; done should include a confirmed cause and a documented fix or clear determination of whether blank-space interpolation is supported.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
cli, data
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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