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NADCON – a free utility for Microsoft Windows to convert between NAD 27 and NAD 83; nadcon.prl – a web-based utility for NADCON; NAD 83: What Is It and Why You Should Care by Dane E. Ericksen, P.E., Hammett & Edison, Inc., Consulting Engineers. 1994 SBE National Convention and World Media Expo. Archived 26 June 2011 at the Wayback Machine
The Universal Transverse Mercator (UTM) is a map projection system for assigning coordinates to locations on the surface of the Earth. Like the traditional method of latitude and longitude , it is a horizontal position representation , which means it ignores altitude and treats the earth surface as a perfect ellipsoid .
Magnitude of shift in position between NAD27 and NAD83 datum as a function of location. Grid-based transformations directly convert map coordinates from one (map-projection, geodetic datum) pair to map coordinates of another (map-projection, geodetic datum) pair.
The coordinate format can be chosen via Tools → Options → 3D View → Show Lat/Long. There are many ways to obtain coordinates: Move the mouse pointer to where you want, then use the keyboard to select the Menu item Edit → Copy View Location to copy the coordinates to the clipboard. More convenient is the associated keyboard shortcut.
This same notation is used in both UTM and MGRS, i.e. the UTM grid reference system; the article on Universal Transverse Mercator shows many maps of these grid zones, including the irregularities for Svalbard and southwest Norway. As Figure 1 illustrates, Honolulu is in grid zone 4Q. Figure 1. The origin of the MGRS grid, in the Pacific.
USNGapp.org is a free browser-based app which shows a mobile user's current USNG location. Once loaded, the app works without an Internet connection. A growing number of software applications incorporate or refer to the US National Grid. See the External Links section below for links to some of these, including The National Map (USGS).
The system is based on the datums NAD 83 and NAVD 88. [3] In 2024 or 2025, [needs update] the NSRS will be modernized with a focus on Global Navigation Satellite Systems (GNSS) and geoid use. It will use the following four frames of reference, each representing a tectonic plate: [4] [5] North American Terrestrial Reference Frame of 2022 (NATRF2022)
EPSG Geodetic Parameter Dataset (also EPSG registry) is a public registry of geodetic datums, spatial reference systems, Earth ellipsoids, coordinate transformations and related units of measurement, originated by a member of the European Petroleum Survey Group (EPSG) in 1985.