selregion: Select horizontal regions
| cdo_selcircle | R Documentation |
Select horizontal regions
Description
Selects all grid cells with the center point inside user defined regions or a circle. The resulting grid is unstructured.
Usage
cdo_selcircle(
ifile,
regions = NULL,
lon = NULL,
lat = NULL,
radius = NULL,
ofile = NULL
)
cdo_selregion(
ifile,
regions = NULL,
lon = NULL,
lat = NULL,
radius = NULL,
ofile = NULL
)
Arguments
ifile |
String with the path to the input file. |
regions |
STRING - Comma-separated list of ASCII formatted files with different regions |
lon |
FLOAT - Longitude of the center of the circle in degrees, default lon=0.0 |
lat |
FLOAT - Latitude of the center of the circle in degrees, default lat=0.0 |
radius |
STRING - Radius of the circle, default radius=1deg (units: deg, rad, km, m) |
ofile |
String with the path to the output file. |
Details
selregion Select cells inside regions
Selects all grid cells with the center point inside the regions.
Regions can be defined by the user via an ASCII file.
Each region consists of the geographic coordinates of a polygon.
Each line of a polygon description file contains the longitude and latitude of one point.
Each polygon description file can contain one or more polygons separated by a line with the character \\&.
Predefined regions of countries can be specified via the country codes.
A country is specified with dcw:<CountryCode>. Country codes can be combined with the plus sign.
selcircle Select cells inside a circle
Selects all grid cells with the center point inside a circle. The circle is described by geographic coordinates
of the center and the radius of the circle.
Value
Operators that output one or more files return a character vector to the output files.
Operators that output an indefinite number of files return a string with the basename of the files.
Operatos that don't return filenames return a character vector with the string output.
