PRECISION FOR THE FUTUREALTA/NSPS Table A items
Every Table A item under the 2026 standards, including the new encroachment table, and what each one means for the plat.
Resources
Standards guides for US surveying, LiDAR & BIM teams
The specifications behind the deliverables, explained by the people who draft and process them every night: what each standard actually requires, the numbers that matter, and where projects usually go wrong.
Standards guides
ASPRS LiDAR classification codes
The ASPRS LAS 1.4 standard classes 0–22, what each one means in practice, and which ones USGS 3DEP deliverables must use.
USGS 3DEP lidar quality levels
QL0 to QL3 side by side: pulse density, vertical accuracy and DEM cell size, and which level fits which job.
Drone survey accuracy & GCPs
GSD, ground control versus checkpoints, RTK/PPK, GCP layout, and how to report accuracy under the ASPRS standard.
Scan-to-BIM LOD & LOA
BIMForum LOD 100–400 and USIBD LOA10–50, why an as-built model needs both, and a simple way to write the scope.
Guides are written for working surveyors, engineers, GIS and BIM managers. They summarize the published standards and link to every source; always check the current edition before you sign or bid.
Need the work, not just the reading?
Send a sample dataset, field file, or project specification and we’ll come back with a scoped estimate and a turnaround schedule.