No audio available for this content. On April 24-25, 2017, the National Geodetic Survey (NGS) hosted the 2017 Geospatial Summit in Silver Spring, Maryland, to discuss its plans for replacing the North ...

This is the story of two surveyors who met after retirement to accomplish two geodetic leveling projects in Maine and New Hampshire. Independent of each other, we had vacationed in those states, ...

Estonia is giving up the Kronstadt Tide Gauge as its main reference point for measuring vertical elevation and altitude, and instead joining the European Vertical Reference System based on the ...