NAME

m.geo - Calculates conversion coordinates for geographic positions.
"(SCS GRASS Map Development Program)

SYNOPSIS

m.geo
m.geo help

DESCRIPTION

This program allows a user to interactively: convert projection coordinates Northings and Eastings to Latitude and Longitude values, or

allows a user to interactively: convert Latitude and Longitude values to projection coordinate Northings and Eastings.

It allows a user to do all of the above: reading from a file, writing to the screen, or reading from the keyboard, writing to a file, or reading from a file, writing to a file,

Note: The program does not transform GRASS files, it is designed to determine coordinate values on an individual position.

Several map projections are currently supported:

stp - State Plane,
for all CONUS, Alaska, Hawaii, Puerto Rico, Guam, Virgin Islands, American Samoa, Northern Mariana Islands, Palau, and U.S. Minor Outlying Islands airy - Airy-F aea - Albers Egual Area-FI apian - Apian Globular I-F aeqd - Azimuthal equidistant-FI aitoff - Aitoff-F august - August Epicycloidal-F bacon - Bacon Globular-F bipc - Bipolar Conic-FI boggs - Boggs Eumorphic-F bonne - Bonne-FI cass - Cassini-FI cc - Central Cylindrical-FI cea - Cylindrical Equal Area-FI collg - Collignon-FI dense - Denoyer Semi-Elliptical-F eck1 - Eckert I-FI eck2 - Eckert II-FI eck3 - Eckert III-FI eck4 - Eckert IV-FI eck5 - Eckert V-FI eck6 - Eckert VI-FI eisen - Eisenlohr-F eqc - Equidistant Cylindrical-FI eqdc - Equidistant Conic-FI fourn - Fournier Globular-F gall - Gall (Stereographic)-FI goode - Goode Homolosine-F gnom - Gnomonic-FI hammer - Hammer (Elliptical)-F hataea - Hatano Asymmetrical Equal Area-FI lagrng - Lagrange-F laea - Lambert Azimuthal Equal Area-FI leac - Lambert Equal Area Conic-FI lcc - Lambert Conformal Conic-FI loxim - Loximuthal-FI mbtfpp - McBryde-Thomas Flat-Polar Parabolic-FI mbtfps - McBryde-Thomas Flat-Polar Sinusoidal-FI mbtfpq - McBryde-Thomas Flat-Polar Quartic-FI merc - Mercator-FI mill - Miller-FI moll - Mollweides-FI nicol - Nicolosi Globular-F nsper - General Vertical Persepective-FI ocea - Oblique Cylindrical Equal Area-FI omerc - Oblique Mercator-FI ortel - Ortelius-F ortho - Orthographic-FI parab - Caster Parabolic-FI pconic - Perspective Conic-F poly - Polyconic (American)-FI putp2 - Putnins P2'-FI putp5 - Putnins P5-FI quau - Quartic Authalic-FI rpoly - Rectangular Polyconic-F robin - Robinson-FI sinu - Sinusoidal-FI stere - Stereographic-FI tcc - Transverse Central Cylindrical-FI tcea - Transverse Cylindrical Equal Area-FI tmerc - Transverse Mercator-FI tpers - Tilted perspective-FI ups - Universal Polar Stereographic-FI utm - Universal Transverse Mercator-FI vandg - Van der Grinten-FI vandg2 - Van der Grinten II-F vandg3 - Van der Grinten III-F vandg4 - Van der Grinten IV-F wag7 - Wagner VII-F wink1 - Winkel I-FI wintri - Winkel Tripel-F
Each of the above projections (with the exception of State Plane) can be computed with the following spheroids:
MERIT     - MERIT 1983
GRS80     - GRS 1980(IUGG, 1980)
IAU76     - IAU 1976
airy      - Airy 1830
aust_ntl  - Australian Natl, S. Amer., IAU 64
GRS67     - GRS 67(IUGG 1967)
bessel    - Bessel 1841
clrk66    - Clarke 1866
clrk80    - Clarke 1880 mod.
everest   - Everest 1830
hough     - Hough
intl      - International 1909 (Hayford)
krass     - Krassovsky, 1942
mercury   - Mercury 1960
mod_airy  - Modified Airy
mod_ever  - Modified Everest
mod_merc  - Modified Merc 1968
new_intl  - New International 1967
SEasia    - Southeast Asia
walbeck   - Walbeck
WGS66     - WGS 66
WGS72     - WGS 72
sphere    - Sphere of 6370997 m

INPUT FILE FORMAT

When reading from a file of LATITUDE/LONGITUDE data the file will contain three (3) columns of information:
the first column - latitude - in degrees minutes seconds,
the second column - longitude - in degrees minutes seconds,
the third column - zone - zero(0) if not required.

For example:

           +40 36 31.4563	-87 2 7.8193	16
           40n 36 31.4563	87w 2 7.8193	16

When reading from a file of PROJECTION COORDINATES data the file will contain three (3) columns of information:

the first column - easting - ground coordinates
the second column - northing - ground coordinates
the third column - zone - zero(0) if not required.

For example:

       500000.00	4496918.64	16	<- utm
      -424489.11	1908736.13	0	<- lambert

Note: NO column headings are required, just the numbers.

SEE ALSO

Mapgen, proj

AUTHOR

R.L. Glenn, USDA, SCS, NHQ-CGIS