Mapping_count

aggregation-functions mapping_count

syntax

• mapping_count(orgGridUnit, destGridUnit, value-type)

definition

• mapping_count(orgGridUnit, destGridUnit, value type) is defined as the count of the number of cells of the orgGridUnit domain-unit in the destGridUnit domain, expressed in the value-type argument.

description

The mapping_count(orgGridUnit, destGridUnit, uint32) function is synonym for pcount (mapping(orgGridUnit,destGridUnit)).

Use the mapping_count function if the number of cells in the orgGridUnit is very large (the mapping function would than also result in a large data-item).

The explicit configuration of the value type argument is also useful to limit the size of the resulting data item.

applies to

Domain units orgGridUnit and destGridUnit with a Point value type of the group CanBeDomainUnit.

since version

7.160

example

attribute<uint16> countNr15Cells (GridDomain3000) := mapping_count(GridDomain15, GridDomain3000, uint16);

domain GridDomain3000, nr of rows = 9

see also

• mapping