which-polygon
Advanced tools
A simple index for matching points against a set of GeoJSON polygons to find what polygon a point belongs to. For example, determining the country of a location given a countries GeoJSON.
Using this 50m world countries dataset:
var geojson = require('./countries.json');
var query = whichPolygon(geojson);
query([30.5, 50.5]).admin; // 'Ukraine'
The input GeoJSON must be a feature collection of polygons or multipolygons.
Once the index is built, queries are pretty fast — 17 seconds to query 1 million random locations on a Macbook Pro in this particular case.
FAQs
Index for matching points against a set of GeoJSON polygons
The npm package which-polygon receives a total of 14,430 weekly downloads. As such, which-polygon popularity was classified as popular.
We found that which-polygon demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 28 open source maintainers collaborating on the project.
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