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WCPS-Tutorial / Condensers: how to obtain summary information about a coverage

Condensers consolidate cell values of a coverage along selected axes to a scalar value based on the condensing operation indicated. It iterates over a given domain while combining the results from evaluating a scalar expression through the summarisation operation indicated.

There are two variants of condensers in WCPS:

Background information:

  • the condenser shorthands correspond to aggregate operations in SQL. The general condenser concept is a higher-order concept generalizing aggregates.
  • condensers collapse or "reduce" a coverage to a single scalar value; this gives rise to the alternative name "reduce operations".

See manual: condenseExpr