When publishing data on the Internet it is a common practice to provide the data using standardized exchange protocols. Adopting standards facilitates a wide usage of the data. In the geospatial domain the OGC and ISO TC211 data exchange standards are the industry standards, and for example required by the European INSPIRE regulations. The Bridge extension takes care of exporting your map, data, styles and metadata to opensource mapping platforms that provide data exchange and catalog services that comply with these standards. Bridge will properly link service and metadata and vice versa, so users can easily bind to a service from a catalog search result or find the relevant metadata for an exposed dataset.
Serverside software components currently supported by Bridge are GeoServer, MapServer, GeoNetwork Opensource. Some options are available to migrate data to and expose data from PostGIS.
You can also choose to save the metadata and map symbology on your computer as files or in a GeoPackage so you can use them to publish on other software platforms (deegree, QGIS).
Supported components and formats¶
GeoServer is the reference implementation of the Open Geospatial Consortium (OGC)_ Web Feature Service (WFS) and Web Coverage Service (WCS) standards, as well as a high performance certified compliant Web Map Service (WMS). GeoServer has a REST api, which can be used to configure featuretypes. Bridge uses this API to publish data. Geoserver internally uses SLD to define the visualisation of data layers.
MapServer is an Open Source platform for publishing spatial data and interactive mapping applications to the web. Originally developed in the mid-1990’s at the University of Minnesota, MapServer is released under an MIT-style license, and runs on all major platforms (Windows, Linux, Mac OS X). Mapserver services are defined by map files, these configuration files can be generated by Bridge.
GeoNetwork Opensource is a catalog for registering spatial assets, such as datasets. It contains a CatalogService for the Web (CSW) endpoint. GeoNetwork can operate on various metadata models via a plugin mechanism. It supports ISO19115-3, ISO19139, ISO19110 and DCAT metadata standards. GeoNetwork Opensource software complies with the requirements of INSPIRE discovery services and metadata.
GeoStyler-style is a styling format used in the Shogun framework. Geoserver also has a plugin that allows to style layers using GeoStyler-style. Bridge uses this format internally as an intermediate format, but it can also be exported to be used directly.
PostGIS is a spatial extension to the popular open source postgres database. Bridge is able to export any local data to a remote (or local) postGIS database. That data can then be used to set up data services.