mapbox / mapbox/tippecanoe

mbtiles not rendering at middle zoom levels in areas of high mountainous terrain; vector tiles may have high density for certain zoom levels

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C++
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Description

Im getting some missing tiles in some areas on the map. i suspect the tile that are not rendering properly/at all contain a lot more information than the tiles that do render normally ( these tiles may contain low density or less information/data)

I notice its at about between zoom levels 4-8 over high mountainous terrain areas on the northwest region of the US that these tiles are not rendering.

![image](https://user-images.githubusercontent.com/72456221/146688182-db5d71b6-3b62-46c5-9510-d24821533843.png)

these are the tippecanoe flags I'm using to create the mbtiles:

`--drop-densest-as-needed --extend-zooms-if-still-dropping -z10 -S12 -d16 -ac -ao -o '`

I figure that `--drop-densest-as-needed` and `--extend-zooms-if-still-dropping ` would help the higher density tiles render those zoom levels. Are there any other flags that would help render high densed vector tiles over really mountains area at any/all zoom levels?

Contributor guide

Open the contributing guide

Research direction

Start by reproducing the missing tiles over high mountainous terrain in the northwest US at zoom levels 4–8 using the reported Tippecanoe flags: --drop-densest-as-needed, --extend-zooms-if-still-dropping, -z10, -S12, -d16, -ac, and -ao. Compare high-density and low-density areas and determine whether an additional flag or another cause is needed; done means the affected vector tiles render at the reported zoom levels.

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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