{"id":"1fbc1b8f-8685-4be8-a57d-55b0887d51f5","task":"Apply the ASPRS Positional Accuracy Standards for Digital Geospatial Data (Edition 2) accuracy classes","domain":"asprs.org","steps":["Confirm you are working from ASPRS Positional Accuracy Standards for Digital Geospatial Data, Edition 2, Version 1.0 (adopted by the ASPRS Board August 23, 2023) — this superseded the 2014 edition and changed several core mechanics.","Note the key methodology shift: Edition 2 uses RMSE as the sole accuracy statistic (the old 95% confidence-level reporting was eliminated) and defines unlimited horizontal/vertical accuracy classes plus a new 3D accuracy metric, rather than the older fixed map-scale-driven classes.","Select or specify the required accuracy class for the deliverable based on project needs (independent of published GSD, map scale, or contour interval, since the 2023 edition is sensor-agnostic and data-driven).","Design the accuracy assessment with a minimum of 30 independent checkpoints (increased from 20 in the prior edition), well distributed across the project area and land-cover types.","Document the achieved RMSE values against the target class in the metadata/accuracy report delivered with the dataset, clearly citing the ASPRS Edition 2 standard and accuracy class used."],"gotchas":["Contracts or specs still referencing the 2014 edition's map-scale accuracy classes or 95% confidence values are outdated — reconcile old boilerplate language with Edition 2 before signing a new scope.","The jump from 20 to 30 minimum checkpoints increases field/QC cost; budget for it rather than reusing an old checkpoint count.","Because Edition 2 is sensor-agnostic, don't assume a given GSD automatically implies a specific accuracy class — accuracy must be demonstrated by checkpoint testing, not inferred from resolution."],"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":"verified","url":"https://mcp.waymark.network/r/1fbc1b8f-8685-4be8-a57d-55b0887d51f5"}