pobieranie informacji od użytkownika poprzez OL

[Dave]

A "Cascading Map Server" is a WMS that behaves like a client of other WMSes and
behaves like a WMS to other clients. For example, a Cascading Map Server can
aggregate the contents of several distinct map servers into one service. Furthermore, a
Cascading Map Server can perform additional functions such as output format conversion
or coordinate transformation on behalf of other servers.

Definicja wg. dokumentu "Web Map Service Implementation Specification"