The purpose of this page is to explain how to find and access map sources on the Internet
MapBuilder itself doesn't provide any map data, the actual maps and data are retreived from web services distributed on the internet (or installed locally) through web services. These web services are typically standards-based interfaces as specified by the Open Geospatial Consortium, and the Web Map Service (WMS) specification in particular. See the References page for a complete list of the specifications implemeted in MapBuilder and links to the specification documents.
Maps used in MapBuilder are primarily from OGC Web Map Context documents. A context document provides an interoperable way of storing and sharing maps created using the various OGC web service specfications by listing the layers that should be included in your map.
Sources for these maps:
- use the Context Editor demo: this demo is intended as a search-based paradigm for adding WMS layers to an existing map. Layers can be added, deleted and re-ordered using a Graphical User Interface. This is an area of on-going work in Mapbuilder to connect to various catalogs in this way. An implementation of this demo is on the GeoConnections Discovery Portal.
- Create your own: Use a text or XML editor to add and delete layers to an existing or new context document. This method is tedious and difficult but can be used for simple changes.
- owsview: Functions include adding layers by browsing WMS capabilities doc and loading and saving context documents.
If you know of any other map sources as Context documents, please add them here.
There is ongoing development work in MapBuilder to include other sources of geospatial information in your maps, including Web Feature Services (WFS) and GeoRSS, including web interfaces for updating the map information in the Feature Entry demo.