OvertureMaps / OvertureMaps/data
Simplification of borders for countries in division_area
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- Python
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Description
I have been downloading country polygons from Overture maps where the subtype == 'country' andis_land == True. The data I am receiving borders that are extremely simplified compared to the county or other subtypes. These borders are also much more simplified than the ocean polygon I am downloading.
Here is an example of the output for the country polygon for the US in NYC.
Is this a bug in the output, or is OvertureMaps specifically simplifying the coastlines when downloading countries from division_area?
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the reported US/NYC comparison using the country and ocean polygons downloaded from division_area, then compare them with county and other subtypes. Check the generated geometry and the data-processing path to determine whether the coastline simplification is intentional. Done means documenting the cause or identifying a concrete output bug and its affected data.
Written by the indexing model from the issue text.
Assessment
- Domain
- data
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 30/100