February 7, 2024 OSU grant proposal includes developing time-dependent models for the new, modernized NSRS By David B. Zilkoski
January 3, 2024 Time is running out to submit GNSS or leveling data for initial NSRS modernization By David B. Zilkoski
December 6, 2023 ASPRS approves edition 2 of the ASPRS Positional Accuracy Standards for Digital Geospatial Data By David B. Zilkoski
December 4, 2023 They used GPS even before it was fully built: The adoption of GPS by surveyors By David B. Zilkoski
July 5, 2023 NGS Discusses the New NSRS at the International 2023 FIG Working Week By David B. Zilkoski
May 2, 2023 NGS replacing NGS 58 and 59 documents: Specifications for GNSS geodetic control surveys using OPUS projects By David B. Zilkoski
