A Node web server that periodically loads a GeoJSON file with points in it and exposes an API to find the nearest points from a lat/lon.
Every 60 seconds, the server loads a URL, parses it as GeoJSON, and dumps the Points contained therein into a sphere-knn object. It exposes an API to query that KNN dataset by lat/lon or zipcode. Since the data is stored in memory and KNN is a very fast algorithm, searching can be performed very quickly: usually in under 10ms.
This is a more generic version of divvyapiapi.
The GeoJSON URL must be configured by setting the GEOJSON_URL environment variable to an HTTP/HTTPS URL to a GeoJSON with a FeatureCollection of Point type Features.
The service exposes a single API endpoint:
Returns the nearest points to a given location. The location can be specified with a lat/lon pair or a zipcode.
The API responds with a FeatureCollection of the results.
| Query Arg Name | Description |
|---|---|
lat |
The latitude for the center point to search from. |
lon |
The longitude for the center point to search from. |
zipcode |
A US Zipcode to use as the center point to search from. |
limit |
An integer 1 to 50. Defaults to 5. The maximum number of points to return. |