WCPS-Tutorial / Sequential inspection
Coverage processing is not constrained to just one coverage.
for construct suggests it actually comprises an iterator
which inspects the coverages listed one by one (and in the sequence given).
For example, raw satellite images (such as L1a imagery) might be offered as a set of
of a seamless map which would require extra preprocessing steps. A set of coverages
s3 can be retrieved by:
for s in ( s1, s2, s3 ) return encode( s, "jpeg" )
The response, then, consists of a package containing three individual image files. Similarly, a request for summary data on these coverages would result in a list of three scalar data items.
See manual: coverageListExpr