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# Module mgrs

Military Grid Reference System (MGRS/NATO) references.

Military Grid Reference System (MGRS/NATO) classes Mgrs and MGRSError and functions parseMGRS and toMgrs.

Pure Python implementation of MGRS / UTM conversion functions using an ellipsoidal earth model, transcoded from JavaScript originals by (C) Chris Veness 2014-2016 published under the same MIT Licence**, see MGRS and Module mgrs.

The MGRS/NATO grid references provides geocoordinate references covering the entire globe, based on UTM projections.

MGRS references comprise a grid zone designation, a 100 km square identification, and an easting and northing (in metres).

Depending on requirements, some parts of the reference may be omitted (implied), and easting/northing may be given to varying resolution.

See also United States National Grid and Military Grid Reference System.

Version: 21.11.18

Classes
| MGRSError Military Grid Reference System (MGRS) parse or other Mgrs issue.
| Mgrs Military Grid Reference System (MGRS/NATO) references, with method to convert to UTM coordinates.
| Mgrs4Tuple 4-Tuple `(zone, digraph, easting, northing)`, `zone` and `digraph` as `str`, `easting` and `northing` in `meter`.
| Mgrs6Tuple 6-Tuple `(zone, digraph, easting, northing, band, datum)`, `zone`, `digraph` and `band` as `str`, `easting` and `northing` in `meter` and `datum` a Datum.

Functions
parseMGRS(strMGRS, datum=Datum(name='WGS84', ellipsoid=Ellipsoids.WGS84, transform=Tran`...`, Mgrs=<class 'pygeodesy.mgrs.Mgrs'>, name='') Parse a string representing a MGRS grid reference, consisting of `"zoneBand, grid, easting, northing"`. |
toMgrs(utm, Mgrs=<class 'pygeodesy.mgrs.Mgrs'>, name='', **Mgrs_kwds) Convert a UTM coordinate to an MGRS grid reference. |

Variables
| __all__ = `_ALL_LAZY.mgrs`

Function Details

### parseMGRS (strMGRS, datum=Datum(name='WGS84', ellipsoid=Ellipsoids.WGS84, transform=Tran`...`, Mgrs=<class 'pygeodesy.mgrs.Mgrs'>, name='') |
Parse a string representing a MGRS grid reference, consisting of `"zoneBand, grid, easting, northing"`. Arguments: `strMGRS` - MGRS grid reference (`str`). `datum` - Optional datum to use (Datum). `Mgrs` - Optional class to return the MGRS grid reference (Mgrs) or `None`. `name` - Optional `Mgrs` name (`str`). Returns: The MGRS grid reference as `Mgrs` or if `Mgrs is None` as an Mgrs4Tuple`(zone, digraph, easting, northing)`. Raises: `MGRSError` - Invalid `strMGRS`. Example:
    >>> m = parseMGRS('31U DQ 48251 11932')
    >>> str(m)  # 31U DQ 48251 11932
    >>> m = parseMGRS('31UDQ4825111932')
    >>> repr(m)  # [Z:31U, G:DQ, E:48251, N:11932]
    >>> m = mgrs.parseMGRS('42SXD0970538646')
    >>> str(m)  # 42S XD 09705 38646
    >>> m = mgrs.parseMGRS('42SXD9738')  # Km
    >>> str(m)  # 42S XD 97000 38000

### toMgrs (utm, Mgrs=<class 'pygeodesy.mgrs.Mgrs'>, name='', **Mgrs_kwds) |
Convert a UTM coordinate to an MGRS grid reference. Arguments: `utm` - A UTM coordinate (Utm or Etm). `Mgrs` - Optional class to return the MGRS grid reference (Mgrs) or `None`. `name` - Optional `Mgrs` name (`str`). `Mgrs_kwds` - Optional, additional `Mgrs` keyword arguments, ignored if `Mgrs is None`. Returns: The MGRS grid reference as `Mgrs` or if `Mgrs is None` as an Mgrs6Tuple`(zone, digraph, easting, northing, band, datum)`. Raises: `TypeError` - If `utm` is not Utm nor Etm. `MGRSError` - Invalid `utm`. Example:
    >>> u = Utm(31, 'N', 448251, 5411932)
    >>> m = u.toMgrs()  # 31U DQ 48251 11932