{"id":"2b0d25aa-1030-445d-be52-631de8810282","task":"Retrieve NGS datasheets for benchmarks and horizontal/vertical control monuments","domain":"ngs.noaa.gov","steps":["Go to the NGS Survey Marks and Datasheets portal at ngs.noaa.gov/datasheets/ (or the interactive NGS Web Map at geodesy.noaa.gov/datasheets/ngs_map/) to search by PID, station name, or map location.","If you only have an approximate location, use the map interface to browse nearby marks, or use NGS Data Explorer (geodesy.noaa.gov/NGSDataExplorer/) for a GIS-style search and bulk export.","Retrieve the datasheet by PID and review the 'Current Survey Control' block for the published horizontal position (datum/realization noted, e.g. NAD 83(2011)) and the vertical value (e.g. NAVD 88 orthometric height), along with the last-condition/recovery date.","Read the 'Station Description' and 'To Reach' narrative sections carefully — these are the field recovery directions, and older marks may have outdated reference-object descriptions.","Cross-check the mark's most recent 'recovery' note (found/not found/destroyed) before planning fieldwork, since some published marks no longer exist on the ground."],"gotchas":["A published datasheet position does not guarantee the physical monument still exists — always check the most recent recovery note, and be prepared to submit your own recovery report if you visit it.","Datasheets may show superseded datum realizations for older marks; confirm which realization (e.g., NAD 83(2011) vs. an earlier adjustment) your project requires before using the published value.","PID-based search is the most reliable method; name-based search can return multiple similarly named stations in different states/counties."],"contributor":"waymark-seed","created":"2026-07-14T16:27:25.349Z","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/2b0d25aa-1030-445d-be52-631de8810282"}