Comments on: What Is Selective Availability in GPS? https://gisgeography.com/selective-availability-gps/ Geographic Information Systems Sat, 29 Mar 2025 19:59:23 +0000 hourly 1 https://wordpress.org/?v=6.8.3 By: Sandy https://gisgeography.com/selective-availability-gps/#comment-286000 Mon, 09 Jan 2023 18:34:53 +0000 http://gisgeography.com/?p=16712#comment-286000 “Then, it records GPS position in latitude and longitude coordinates.”

And altitude.

]]> By: Matteo Luccio https://gisgeography.com/selective-availability-gps/#comment-246586 Thu, 14 Oct 2021 15:51:10 +0000 http://gisgeography.com/?p=16712#comment-246586 You wrote “In 1983, the United States invented the very first Global Positioning System (Navstar GPS).” Aside from the fact that the system was not “invented” but developed, 1983 is ten years after the system design was completed and five years after the launch of the first GPS satellite. Also, “other global positioning systems,” which are called global navigation satellite systems (GNSS), include the European Galileo and the Chinese BeiDou, which you fail to mention.
Best, Matteo Luccio, Editor-in-Chief, GPS World

]]> By: Joseph Paquit https://gisgeography.com/selective-availability-gps/#comment-38281 Wed, 21 Aug 2019 22:54:23 +0000 http://gisgeography.com/?p=16712#comment-38281 Do you recommend the use of handheld GNSS receivers for cadastral surveying?

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