GPS on Bench Marks for NSRS Modernization

December 10, 2020  |  2-3 pm, Eastern Standard Time

Galen Scott, National Geodetic Survey

As part of modernizing the National Spatial Reference System, NGS will produce the 2022 Transformation Tool to convert data between NAVD 88 and the upcoming North American-Pacific Geopotential Datum of 2022 (NAPGD2022). Users are encouraged to submit GPS data on existing bench marks to improve the quality of the transformation in their local areas. NGS will build the transformation tool with data submitted by December 31st, 2021. The tool will interpolate over areas without GPSonBM data, meaning that the transformations will be less accurate in those areas. 

NGS provides a prioritized list of bench marks across the United States and Territories to direct users to marks in their area where new GPS observations would have the biggest impact on the quality of the tool. A web map is available that enables users to explore, sort, and download information about the marks on the list. A progress dashboard allows users to track our progress toward meeting the goals.