setPROJ {GEOmap} | R Documentation |
Setup parameters for Map Projection
setPROJ(type = 1, LAT0 = 0, LON0 = 0, LAT1 = 0, LAT2 = 0, LATS = NULL, LONS = NULL, DLAT = NULL, DLON = NULL, FE = 0, FN = 0)
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 |
Set up for the various projections used by GEOmap
List of values described above
Some of the parameters are not critical to all the choices or Map Projection. In that case they are set to defaults and ignored by that projection.
LONs are modified and rectified by fmod function.
Jonathan M. Lees<jonathan.lees.edu>
Snyder, John P., Map Projections- a working manual, USGS, Professional Paper, 1987.
projtype, XY.GLOB, GLOB.XY
###### 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=, 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)