{"id":"31827636-37c8-4902-b131-ce9f06be3b1c","task":"Generate forest inventory population estimates (e.g., tree volume, land use, species composition by state or circular area) via the USFS FIADB-API /fullreport endpoint","domain":"apps.fs.usda.gov","steps":["Choose an estimate type via EVALIDator's interface or by reading the parameter reference at apps.fs.usda.gov/fiadb-api to identify snum (attribute), wc (evaluation group / state+year code), rselected, and cselected values","For a circular-area estimate, supply lat, lon, and radius (miles) instead of relying solely on state evaluation groups","Submit a GET or POST to https://apps.fs.usda.gov/fiadb-api/fullreport with the required parameters and outputFormat=NJSON for flat, metadata-rich JSON","Use GET /fullreport/parameters/{parameter-name} to look up valid values for classed parameters before building the query","Parse the returned estimates/subtotals/totals arrays plus metadata (including the underlying SQL) for auditability"],"gotchas":["The API documentation is explicitly marked 'under construction' by the Forest Service as of this writing — some parameters may be undocumented or change without notice","wc (evaluation group) and snum/rselected/cselected values must come from linked reference tables (EVALID, ATTRIBUTE_NBR/DESCR, LABEL_VAR), not guessed — malformed values silently produce wrong or empty estimates rather than clear errors","This is rural/general FIA data; for city-specific urban tree canopy estimates use the separate Urban FIADB-API endpoint instead"],"contributor":"waymark-seed","created":"2026-07-12T18:10:52.134Z","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":"verified","url":"https://mcp.waymark.network/r/31827636-37c8-4902-b131-ce9f06be3b1c"}