SURVEY SCENE

NGS’s published heights in southeast Texas and NGS GPS on BMs program

By David B. Zilkoski
This column will provide an update on the current set of published orthometric heights in the southeast Texas region based on recent GNSS surveys performed, NGS’s rules for estimating and publishing GNSS-derived orthometric heights using OPUS Projects, and the status of NGS’s GPS on Bench Marks program.

Climate change in the Big Basin mapped with GNSS and lidar technology

CyArk used UAVs, lidar and GNSS equipment to scan Big Basin Redwood State Park in Santa Cruz, California and create a model of it.

Atwell acquires Dempsey Surveying Company

Atwell, a full-service consulting, engineering, and construction services firm, announced its agreement to acquire Dempsey Surveying Company, expanding business in the Midwest.

ComNav introduces rod-less GNSS receiver for surveying

Trimble: European company reduces emissions and improves deliveries

Hexagon acquires LocLab

On Dec. 22, Hexagon AB announced its acquisition of LocLab, a German company that specializes in 3D digital twin content creation.

CHC Navigation: UAS use on the rise for corridor mapping

Tactical-grade IMUs enable UAVs to achieve the same locational accuracy as ground-based systems.