The CBDG server publishes map services using the international standard protocol for web mapping, WMS. Maps can be viewed by means of browsers that are supported by such services, for instance: IKAR, E-PSH, and E-MGSP.
Physiogeographic regions on the basis of the "Geografia regionalna Polski" (Regional Geography of Poland) by Jerzy Kondracki (2002)
http://ikar3.pgi.gov.pl/arcgis/services/cbdg_regiony/MapServer/WMSServer