SUMMARY
This paper discusses an architectural model that is used in implementation of Ginis framework for
realization of open and scalable Web-based geographic information systems (WebGIS). WebGIS
system is considered as a whole that consists of a WebGIS portal and many Web-enabled GISs. For
developing of all application components of an overall WebGIS, we introduced and developed unified
model of geoinformation systems. Unified model leads to implementation of Ginis framework that
further produces configurable GIS application components. Realization of systems using configurable
components involves usage of explicit semantic descriptions of application domains for their
configuring. For encoding of these semantic descriptions we defined Ginis Application Definition
Language (GADL).