This function defines a longitude-latitude box region for a grid. It returns a grid region ID which is used by the EOS_GD_EXTRACTREGION function to read all the entries of a data field within the region.
Result = EOS_GD_DEFBOXREGION(gridID, cornerlon, cornerlat)
Returns the grid region ID if successful and FAIL (–1) otherwise.
Grid id (long) returned by EOS_GD_CREATE or EOS_GD_ATTACH.
Longitude (double, 2 element array) in decimal degrees of box corners.
Latitude (double, 2 element array) in decimal degrees of box corners.
None
In this example, we define the region to be the first quadrant of the Northern hemisphere:
cornerlon[0] = 0.d
cornerlat[0] = 90.d
cornerlon[1] = 90.d
cornerlat[1] = 0.d
regionID = EOS_GD_DEFBOXREGION(EOS_GD_id, cornerlon, cornerlat)
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5.2 |
Introduced |