Fixture only Experimental API Zero live requests

OGC coverage field lab

One elevation band. Two standards paths.

Discover the grid, name the band, and request only the 320 x 220 pixels in view. OGC API Coverages and WCS 2.0.1 meet at the same MapLibre image handoff.

01 / Rendered subset

South Oahu elevation

Loading fixture
Center pixel / fixture truth Loading... Derived from returned bytes
Named bandelevation

03 / Fail without losing the map

Cancellation and degradation are visible.

The active raster stays mounted when a superseded request is aborted or WCS rejects an unknown band.

Implementation evidence

Fixture + digestLoading...

Boundsbbox + 320 x 220 + 1 MiB ceiling

TransportFail-closed injected fetch; no browser network fallback

MaturityExperimental until anonymous live canaries exist