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Filter out split geometries smaller than a specified area #28

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spwoodcock opened this issue Apr 15, 2024 · 0 comments

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bug

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spwoodcock commented Apr 15, 2024 •

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Describe the bug

The splitting algorithm may produce a random split geometry that contains no features (see the tiny blue polygon):

This shouldn't happen often, but is possible.
In order to avoid, we should filter out any final polygons that have areas smaller than a certain size, perhaps 10m2?

To Reproduce

AOI GeoJSON:

{"type":"FeatureCollection","features":[{"type":"Feature","properties":{},"geometry":{"coordinates":[[[85.29998911024427,27.714008043780694],[85.29998911024427,27.710892349952076],[85.30478315714117,27.710892349952076],[85.30478315714117,27.714008043780694],[85.29998911024427,27.714008043780694]]],"type":"Polygon"}}]}

Data extract attached as a .txt file to get around upload restrictions. Rename to .geojson:

kathmandu_extract.txt

Use the splitting algorithm set to 100 buildings average.

Expected behavior

Geometries like that are clearly an artifact that should be removed.

spwoodcock added the bug label

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