Demands for accuracy are increasing and the use of geospatial technologies, such as GIS continue to rise. But how often do you have problems with data not aligning in your GIS? Knowing how your data is collected in terms of reference systems, coordinate systems, and datums, is growing more important to ensure your data layers do align properly.
The National Geodetic Survey produces the National Spatial Reference System (NSRS) ensuring projects have the consistency and accuracy desired. The NSRS consists of the North American Datum of 1983 (NAD83) and the North American Datum of 1988 (NAVD88). There are many tools available to access the NSRS (DS-World, CORS, and OPUS) and these will be highlighted during this session.
DS-World, makes it possible for users to display the million-plus geodetic survey marks and the GPS Continuously Operating Reference Stations (CORS) that make up the NSRS in GoogleEarth. This tool displays survey marks and its associated information. You can access, locate and survey these marks and tie your data layers directly to the NSRS and the most recent datums.
NGS’ OPUS program is highly automated and requires minimal user input accessing the network of CORS for determining ones position. OPUS processes GPS data files along with CORS coordinates to provide results consistent with those of other users in the NSRS.
There are many developments occurring in NGS that will be presented including the new adjustment, new datums (in 2022) and the GRAV-D program (which will change the way we obtain vertical heights).