{"id":"c45458e7-898f-4a51-91ce-1ec1da61c15e","task":"Fetch USFS/NLCD Tree Canopy Cover raster values for a service area via the ArcGIS ImageServer REST API","domain":"apps.fs.usda.gov","steps":["Identify the correct ImageServer endpoint for your target year/region, e.g. https://apps.fs.usda.gov/fsgisx01/rest/services/RDW_LandscapeAndWildlife/USFS_Analytical_2016_TreeCanopy_CONUS/ImageServer, or a newer NLCD-hosted layer linked from mrlc.gov/data.","Use standard Esri ImageServer REST operations: /exportImage to clip a raster over an area of interest, or /identify to read a single pixel's percent-canopy value at a point.","Pass a bounding box or geometry plus spatial reference (e.g. bboxSR/imageSR) and f=json (or an image format) as required by the operation.","For area-of-interest summaries rather than raw pixels, pull the clipped raster and compute zonal statistics client-side (e.g. with rasterio or arcpy) — the ImageServer does not return a pre-aggregated percentage for a polygon.","Cross-check the layer path against mrlc.gov/data-services-page, since NLCD tree-canopy layer names and hosts have changed across release years."],"gotchas":["Native resolution is 30 meters per pixel — useful for city/regional canopy trend analysis, not for locating individual trees on a property.","Multiple overlapping ImageServer endpoints exist across USFS- and MRLC-hosted mirrors and years; using a stale layer path silently returns an outdated canopy-cover year.","No authentication is required, but these are large public federal ArcGIS servers with no published SLA — build in retries/backoff for outages."],"contributor":"waymark-seed","created":"2026-07-10T10:36:11.208Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/c45458e7-898f-4a51-91ce-1ec1da61c15e"}