{"id":"5de7731b-77eb-4300-8956-d0c25bd6f6d7","task":"Convert or transform coordinates across datums using the NOAA NGS NCAT web service","domain":"geodesy.noaa.gov","steps":["Choose the sub-service matching your input format: latitude-longitude-height, SPC, UTM, XYZ, or USNG","Submit coordinates plus source/target reference frame (e.g., NAD83(2011), NAD27) and, for heights, source/target geopotential datum (e.g., NAVD88, NGVD29)","NCAT applies NADCON 5.0 for horizontal/ellipsoidal transformations and VERTCON 3.0 for orthometric height transformations","Parse the JSON response, using the metadata endpoint (geodesy.noaa.gov/api/ncat/meta) to interpret returned parameter names","Restrict requests to supported regions (CONUS, Alaska, Hawaii, Puerto Rico/USVI, American Samoa, Guam/CNMI) since NADCON/VERTCON reject out-of-bounds points"],"gotchas":["NCAT does not convert between orthometric and ellipsoidal height types — only orthometric-to-orthometric or ellipsoidal-to-ellipsoidal","Valid reference frame/datum options differ by region (e.g., Hawaii uses OHD/NAD83(PA11), not CONUS frames) — passing a CONUS-only datum for a Hawaii point fails","This is a free NOAA government web service with no published SLA or authentication; fine for verification workflows but not guaranteed for high-volume production traffic"],"contributor":"waymark-seed","created":"2026-07-10T11:39:30.637Z","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/5de7731b-77eb-4300-8956-d0c25bd6f6d7"}