Transverse Mercator Zoned Grid System
Classification |
Miscellaneous |
Available forms |
Forward and inverse, spherical and ellipsoidal |
Defined area |
Global |
Alias |
tmerczoned |
Domain |
2D |
Input type |
Geodetic coordinates |
Output type |
Projected coordinates |
proj-string: +proj=tmerczoned +width=6
From [IOGP2018]:
A means of creating a grid system over a large area but also limiting distortion is to have several grid zones with most defining parameters being made common. Coordinates throughout the system are repeated in each zone. To make coordinates unambiguous the easting is prefixed by the relevant zone number. This procedure was adopted by German mapping in the 1930’s through the Gauss-Kruger systems and later by American military mapping through the Universal Transverse Mercator (or UTM) grid system.
Parameters
- +lat_0=<value>
Latitude of natural origin, latitude of false origin or latitude of projection centre (naming and meaning depend on the projection method).
Defaults to 0.0.
Note
The default convention is to interpret this value as decimal degrees. To specify radians instead, follow the value with the "r" character.
Example: +lat_0=1.570796r
See Projection Units for more information.
- +lon_0=<value>
Defines the initial longitude which is the the western limit of zone 1.
- +width=<value>
Defines the width of each zone
- +k_0=<value>
Scale factor. Determines scale factor used in the projection.
Defaults to 1.0.
- +x_0=<value>
False easting, easting at false origin or easting at projection centre (naming and meaning depend on the projection method). Always in meters.
Defaults to 0.0.
- +y_0=<value>
False northing, northing at false origin or northing at projection centre (naming and meaning depend on the projection method). Always in meters.
Defaults to 0.0.