USDA SDA / SSURGO
Mapped survey component and horizon attributes at a location, clearly distinguished from a soil test collected at that point.
Experimental API · v0.2.0
Public soil data, with the context developers need.
Query mapped USDA soil survey information and observed NCSS laboratory pedons through typed JSON contracts that keep source fields, depth, methods, retrieval time, detection limits, and scientific warnings visible.
Two USDA data kinds online: mapped survey and observed laboratory pedons
Live contract
Two real data kinds. Explicit boundaries.
USDA SDA / SSURGO is supported for point inspection. NCSS Lab Data Mart is experimental for bounded GeoJSON pedon discovery and method-rich horizon observations.
NCSS laboratory pedons
Observed samples by pedon and horizon, with methods, reported-value qualifiers, depth, coordinates, and representation warnings preserved.
GeoJSON, OpenAPI, and CORS
Bounded feature collections, generated schemas, structured errors, request IDs, cache metadata, and credential-free GET access support D3 dashboards.
Try a location
Request pH and clay.
curl --get 'https://api.opensoil.net/v1/soil/location' \
--data-urlencode 'latitude=39.7102' \
--data-urlencode 'longitude=-111.8363' \
--data-urlencode 'properties=ph,clay' \
--data-urlencode 'depth_top_cm=0' \
--data-urlencode 'depth_bottom_cm=30'Experimental and not site-specific advice: SSURGO values describe representative mapped components and horizons. They are not laboratory measurements at the requested coordinate, and component percentages are not point probabilities.