By Spatial Dimensionality / 2D
Use case: Zoom and pan over a seamless airborne 2-D image map. This OGC Web Map Service (WMS) is implemented via the raster query language - i.e., each GetMap request is translated into a raster query which, following server-side optimization and evaluation, presents the image requested.
Web Mapping still is the prevailing application of geo services. The OGC Web Map Servive (WMS) represents the standard for accessing maps as stacked layers, whereby each layer can be styled individually.
In these demos, a standard WMS interface is used; maps are generated, however, through OGC WCPS queries.
Q: What is the difference to Google Maps?