elevation?lat=61.2181&lon=-149.8997

Give it a latitude and longitude and it answers with the ground elevation there in metres above NAVD88, read from the USGS 3D Elevation Program seamless DEM.

Give it a latitude and longitude and it answers with the ground elevation there in metres above NAVD88, read from the USGS 3D Elevation Program seamless DEM. Parameters go in the query string: this is a GET, there is no body. COVERAGE, stated up front because it is the first thing to check: the state of Alaska, whole, and nothing else yet. The coverage gate reads the coordinate, so it runs in the handler and after payment, not in front of the 402: a coordinate outside Alaska is quoted like any other and then refused with outside_coverage. A refusal does not settle, so nothing is charged, but it costs a signature and a second round trip to find out. Check the coverage against this description or the free catalog first. The conterminous United States and Hawaii are the next extension and arrive through the same pipeline with no change to this interface; every response repeats the coverage under `coverage` so an agent never infers it from an error. Canada is not served even where USGS publishes pixels over it: those come from Natural Resources Canada under a licence with an attribution clause, and this catalog carries public-domain data only, so they were not stored. SOURCE AND VINTAGE: USGS 3DEP seamless 2 arc-second product, the resolution USGS publishes for Alaska, a work of the United States government in the public domain (17 U.S.C. 105). A 2 arc-second pixel is about 62 m north to south and 20 to 30 m east to west at Alaskan latitudes; the response states the pixel size at your latitude. USGS republishes blocks as new lidar and IFSAR arrive, and the response carries the publication date of the block that answered you. Heights are orthometric, NAVD88, metres; horizontal positions are NAD83, which this endpoint reads as WGS 84 since the two differ by under two metres, a fraction of a pixel. INTERPOLATION: bilinear over the four pixel centres around the point by default, which is what GDAL and PROJ do for a continuous surface. Pass interpolation=nearest for the rast

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Paid for on the same host1 of 21 endpoints at api.geoprimitives.dev

Other endpoints on api.geoprimitives.dev that were paid for
Endpoint	Grade	Paid calls	Last result	Last seen
GET /v1/marine/depth?lat=57.0405&lon=-135.3421	UNRATED	2	delivered	9 hr ago

All 21 endpoints on this host

Verify it yourselfnpx teppi-check https://api.geoprimitives.dev/v1/elevation?lat=61.2181&lon=-149.8997curl -s https://api.teppi.xyz/v1/trust/cap_01M1A59RVFTQKJSVGBJDBG11Z6