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The intersection of a UTM zone and a latitude band is (normally) a 6° × 8° polygon called a grid zone, whose designation in MGRS is formed by the zone number (one or two digits – the number for zones 1 to 9 is just a single digit, according to the example in DMA TM 8358.1, Section 3-2, [1] Figure 7), followed by the latitude band letter ...
Utility to convert latitude and longitude to USNG (NOAA/NGS) Programmer resource: JavaScript utility for converting between lat/long and MGRS/USNG; Emergency Location Marker (ELM) system brief introductory videos: Cook & Lake Counties (MN) (49s) Cobb County (GA): "Cobb County Expands Trail Marker Program" (1m 59s)
Under the Chairman of the Joint Chiefs of Staff Instruction CJCSI 3900.01C dated 30 June 2007, GARS was adopted for use by the US DoD as "the “area-centric” counterpart to the “point-centric” MGRS". It uses the WGS 1984 Datum and is based on lines of longitude (LONG) and latitude (LAT). It is intended to provide an integrated common ...
Informally, specifying a geographic location usually means giving the location's latitude and longitude. The numerical values for latitude and longitude can occur in a number of different units or formats: [2] sexagesimal degree: degrees, minutes, and seconds : 40° 26′ 46″ N 79° 58′ 56″ W
Latitude bands are not a part of UTM, [7] but rather a part of the military grid reference system (MGRS). [8] They are however sometimes included in UTM notation. Including latitude bands in UTM notation can lead to ambiguous coordinates—as the letter "S" either refers to the southern hemisphere or a latitude band in the northern hemisphere ...
Longitude Zone -> "UTM Zone" or just plain Zone; Latitude Zone -> Latitude Band (the terminology from the MGRS documention) The combination UTM Zone + Latitude Band -> Grid Zone (again this is MGSR terminology) I also propose the following clarifications: The use of the Latitude Band in UTM is twofold:
Many other utilities exist to convert latitude and longitude to locators, as this is a favourite hack for programmers who are also radio amateurs. Perl supports conversion between geographical coordinates and Maidenhead locators in module Ham::Locator by Andy Smith, available on CPAN. [10]
The scale factor at each pole is adjusted to 0.994 so that the latitude of true scale is 81.11451786859362545° (about 81° 06' 52.3") North and South. The scale factor inside the regions at latitudes higher than this parallel is too small, whereas the regions at latitudes below this line have scale factors that are too large, reaching 1.0016 ...