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TAG: William Tewelow

Image: NAPSG [https://www.napsgfoundation.org/]

How public safety GIS saves us when disaster strikes

November 11, 2020

1960: ARPA launched Transit, the first satellite in what would become the world’s first GPS. (Photo: U.S. Army/DARPA)

The evolution of GPS satellites and their use today

September 16, 2020

Image: GPS World

A straightforward explanation of oblique

August 1, 2019