{"id":"d6ab805c-8fea-4119-8351-af7567a7d310","task":"Apply current USGS 3DEP lidar specifications and point-cloud classification requirements","domain":"usgs.gov","steps":["Confirm the current Lidar Base Specification (LBS) revision on usgs.gov/ngp-standards-and-specifications before writing or accepting a scope — the LBS has been revised multiple times (e.g., 2022 rev. A, then a 2025 rev. A), so cite the version actually in force at proposal time.","Require point deliverables in LAS format per the current LBS version requirement (recent revisions specify LAS 1.4-R15 using Point Data Record Format 6, 7, 8, 9, or 10).","Classify points using at minimum the LBS's required classification scheme (found in the specification's classification table) — ground, unclassified, noise, water, etc. — noting that USGS only quality-assesses accuracy for the minimum required classes, not any extended custom classes a vendor adds.","Confirm the contracted Quality Level (QL) for the project (QL0–QL2 point densities are common for 3DEP work) and ensure the vertical/horizontal accuracy requirements tied to that QL are met and documented.","Review the specification's data processing and handling requirements section for calibration, void-filling, and breakline requirements applicable to the specific QL and end-use before final delivery."],"gotchas":["Citing an old LBS version (e.g., 2014 or 2020) in a current contract can create a mismatch with what USGS or a state partner actually expects for a 3DEP-funded project — always verify the currently effective revision.","Extended/custom classification beyond the minimum required scheme is not accuracy-checked by USGS, so don't rely on non-minimum classes (e.g., a vendor's custom building class) as if they carry the same QA rigor as ground classification.","Quality Level and point density are independent of raster DEM resolution — confirm both are specified, since a client may say '1-meter DEM' without realizing that maps to a specific required point-cloud QL."],"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/d6ab805c-8fea-4119-8351-af7567a7d310"}