GEOmap (version 2.5-11)

setPROJ: Set Projection

Description

Setup parameters for Map Projection

Usage

setPROJ(type = 1, LAT0 = 0, LON0 = 0, LAT1 = 0, LAT2 = 0, LATS = NULL,
 LONS = NULL, DLAT = NULL, DLON = NULL, FE = 0, FN = 0, IDATUM=1)

Value

List of values described above

Arguments

type

Type of projection

LAT0

Central Latitude

LON0

Central Longitude

LAT1

Latitude parameter for special projection, where needed

LAT2

Latitude parameter for special projection, where needed

LATS

vector of range of Latitudes

LONS

vector of range of Longitudes

DLAT

difference of Lats

DLON

difference of Lons

FE

False Easting

FN

False Northing

IDATUM

integer, index to the datum database

Author

Jonathan M. Lees<jonathan.lees.edu>

Details

Set up for the various projections used by GEOmap

References

Snyder, John P., Map Projections- a working manual, USGS, Professional Paper, 1987.

See Also

projtype, XY.GLOB, GLOB.XY, DATUMinfo

Examples

######  type
projtype()
######  type = mercator spherical
setPROJ(type = 1, LAT0 =23, LON0 = 35)

### Hengill Map: lambert.cc
setPROJ(type=3, LAT0=65, LON0=360-19 ,LAT1=64+15/60,
LAT2=65+45/60,LATS=NULL, 
LONS=NULL, DLAT=NULL, DLON=NULL,FE=500000,FN=500000)

### old lees/crosson projection
setPROJ(type=99, LAT0=23, LON0=35, LATS=NULL, LONS=NULL, DLAT=NULL,
DLON=NULL, FN =0)

###  world map equid.cyl
setPROJ(6, LAT0=0, LON0=0)

##  North Carolina Map lambert.cc
setPROJ(type=3, LAT0=36+20/60, LON0=78+30/60,LAT1=36+46/60,
LAT2=37+58/60, LATS=NULL, LONS=NULL, DLAT=NULL, DLON=NULL,FE=0,FN=0)

###  No Projection
setPROJ(type = 0, LAT0 =23, LON0 = 35)