Identify and remove duplicate polygons that exist in 2+ input vector files

Input vector files sometimes comprise overlapping areas where the same geographic feature is represented in each file, as is the case with the Ice Wedge Polygons. Where this overlap occurs, the resulting vector tiles contain duplicated polygons, which result in artificially inflated polygon counts and area measurements in the viz-raster steps.

To handle overlap, we decided to remove the duplicate polygons where the distance between centroids is smaller than some threshold. Specifically:

for any two polygons that ...
1. originate from different files,
2. are overlapping, and
3. have centroids within a given tolerance e
... only keep the polygon from the file with the more recent underlying satellite image

It was decided that 5 meters is likely a good threshold e for the Ice Wedge Polygons

PermafrostDiscoveryGateway / viz-staging

Identify and remove duplicate polygons that exist in 2+ input vector files #1