Can't suppress polygon simplification

[bertday]

Hello!

I have hexagons that look like this:

which I'm trying to turn into vector tiles. This is the command I'm using:

cat ./summary_hexagons.geojson | tippecanoe \
  --minimum-zoom=6 \
  --maximum-zoom=16 \
  --no-line-simplification \
  --no-tile-compression \
  --no-tiny-polygon-reduction \
  --no-feature-limit \
  --no-tile-size-limit \
  --force \
  --output-to-directory ./summary_hexagons

For some reason they come out looking a bit misshapen:

Can anyone think of what I might be doing wrong? I was hoping --no-line-simplification would do the trick, but it seems like some simplification might still be happening. Thank you any advance for any thoughts!

[bdon]

What zoom level is your screenshot at? The MVT design involves snapping to a discrete grid of usually 4096x4096 pixels so this might be the effect of overzooming + precision loss.

[bertday]

@bdon My screenshot is from around zoom level 10, so within the min and max I passed in to Tippecanoe. I appreciate that background, though. I'll keep thinking on it!

[mtravis]

@rbrtmrtn I've come across this issue myself before.
Check out the table in zoom levels section of the readme https://github.com/felt/tippecanoe#zoom-levels

Looking at youe data you may want to make max zoom 18?

[bertday]

@mtravis thanks for the suggestion to check out zoom levels. I'm re-running Tippe with maxzoom 18.

Something I'm wondering — whatever I set the maxzoom to, as long as I'm viewing the tiles below that zoom level, is there a reason the geometries would look off? Do I need to tinker with something the tile resolution flags? 🤔

Perhaps related? mapbox/tippecanoe#609

[bertday]

This is what worked for me in the end, for forever posterity 😄

cat ./summary_hexagons.geojson | tippecanoe \
--minimum-zoom=6 \
--maximum-zoom=16 \
--full-detail=16 \
--no-line-simplification \
--no-tile-compression \
--no-tiny-polygon-reduction \
--no-clipping \
--no-duplication \
--no-feature-limit \
--no-tile-size-limit \
--force \
--output-to-directory ./summary_hexagons

I think it was --full-detail which was missing. Thanks to everyone who commented here!