MgrsLetteringScheme Enumeration
Represents a version of the MGRS lettering scheme, used by Crs.FormatMgrs and Crs.ParseMgrs.
NuGet/Assembly: Carmenta.Engine.5.16.2.nupkg (in the CECore assembly)
Syntax
public enum MgrsLetteringSchemeValues
| Value name | Value | Description |
|---|---|---|
| MgrsNew | 0 | Also known as the AA scheme. Used for most geodetic datums. |
| MgrsOld | 1 | Also known as the AL scheme. Used for some datums based on the ellipsoids Bessel 1841, Bessel Namibia, Clarke 1866, Clarke 1880 and Clarke 1880 (IGN). |
Remarks
The Military Grid Reference System has been used with two different lettering schemes for the 100 km squares. The most well-known datum, for which the old lettering scheme has been used, is NAD27 (North American Datum 1927).
However, in the civilian version of MGRS, the US National Grid (USNG), the new (AA) lettering scheme is used for both NAD27 and NAD83.
The methods Crs.FormatMgrs and Crs.ParseMgrs take both a GeodeticDatum and an MgrsLetteringScheme as parameters. The methods will throw an exception if the old scheme is used with a datum whose ellipsoid is not among the five possible ones; see table above. (The related method Crs.TryParseMgrs is not permitted to throw an exception, so it will return false instead.)
Platforms
Windows, Linux, Android