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
Details
Set up for the various projections used by GEOmap
Returns
List of values described above
References
Snyder, John P., Map Projections- a working manual, USGS, Professional Paper, 1987.
Author(s)
Jonathan M. Lees<jonathan.lees.edu>
Note
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.
The datum data base is accesses via the function DATUMinfo. There are 11 different projection datums. These are NAD83/WGS84, GRS 80, WGS72, Australian 1965, Krasovsky 1940, International (1924) -Hayford (1909), Clake 1880, Clarke 1866, Airy 1830, Bessel 1841, Everest 1830.
See Also
projtype, XY.GLOB, GLOB.XY, DATUMinfo
Examples
###### typeprojtype()###### type = mercator sphericalsetPROJ(type =1, LAT0 =23, LON0 =35)### Hengill Map: lambert.ccsetPROJ(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 projectionsetPROJ(type=99, LAT0=23, LON0=35, LATS=NULL, LONS=NULL, DLAT=NULL,DLON=NULL, FN =0)### world map equid.cylsetPROJ(6, LAT0=0, LON0=0)## North Carolina Map lambert.ccsetPROJ(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 ProjectionsetPROJ(type =0, LAT0 =23, LON0 =35)