What you’ll need: your API Key, optionally a station's ID
Both the single station and stations endpoints can return GeoJSON formatted data that is ready to be used in your GIS and mapping applications. This is achieved by setting the output_format query parameter to geojson in your request.
You can see example GeoJSON output here and on either of the other station endpoint pages by setting the output_format parameter to geojson using the dropdown, as pictured below.

