Database Reference
In-Depth Information
How it works...
Inthisrecipe,youimplementedWMSandWFSservicesforaPostGIS layerusing
theMapServeropen-sourceweb-mappingengine.WMSandWFSarethetwocore
concepts to consider when you want to develop a web GIS that is interoperable
across many organizations.
Open Geospatial Consortium
(
OGC
) defined these
two standards (and many others) to make web-mapping services exposed in an
open, standard way. This way, these services can be used by different applica-
tions—for example, you have seen in this recipe that a GIS Desktop tool such as
QGIS can browse and query those services because it understands these OGC
standards (you can get exactly the same results with other tools, such as gvSIG,
uDig,OpenJUMP,andArcGISDesktop,amongothers).Inthesameway,JavaScript
API libraries, most notably, OpenLayers and Leaflet (you will be using these in the
other recipes in this chapter), can use these services in a standard way to provide
web-mapping features to web applications.
