rap_projection {rapr} | R Documentation |
Select Projection System for RAP Extent
Description
This function provides several "standard" projected Coordinate Reference Systems that are suitable for representing Rangeland Analysis Platform products across the contiguous (lower 487) United States at the specified resolution (in meters).
Usage
rap_projection(x, res)
Arguments
x |
character. One of |
res |
integer. Resolution in meters. |
Details
Currently there are three pre-calculated grid systems that have their extent designed to align at 1, 5, 10, 30, 100, and 300 meter resolutions.
"CONUS_AEA"
is the default template used with get_rap(source="rap-10m")
when data spanning multiple UTM zones are requested, unless user specifies
their own template via SpatRaster object as x
or template
argument.
Grid Specifications
-
"CONUS_AEA"
: Albers Equal Area Conic projection for CONUS extent.-
xmin = -2356300
-
ymax = 3172500
-
xmax = 2264000
-
ymin = 270000
-
crs = "EPSG:5070"
-
-
"CONUS_EQUI7
: Equi7Grid projection for CONUS + Hawaii extent.-
xmin = 599500
-
ymax = 4967500
-
xmax = 10737100
-
ymin = 1913500
-
crs = "EPSG:27705"
-
-
"CONUS_IGH"
: Interrupted Goode Homolosine projection for CONUS extent.-
xmin = -13390500
-
ymax = 5836700
-
xmax = -8268600
-
ymin = 2480600
-
crs = "+proj=igh"
-
Value
A SpatRaster object using a standard extent (xmin,ymax,xmax,ymin), resolution and projected Coordinate Reference System.
See Also
Examples
rap_projection("CONUS_AEA", 10)
rap_projection("CONUS_IGH", 100)