OGC Web Services

Overview

At its core, GeoNode provides a standards-based platform to enable integrated, programmatic access to your data via OGC Web Services, which are essential building blocks required to deploy an OGC-compliant spatial data infrastructure (SDI). These Web Services enable discovery, visualization and access your data, all without necessarily having to interact directly with your GeoNode website, look and feel/UI, etc.

OGC Web Services:

  • operate over HTTP (GET, POST)
  • provide a formalized, accepted API
  • provide formalized, accepted formats

The OGC Web Services provided by GeoNode have a mature implementation base and provide an multi-application approach to integration. This means, as a developer, there are already numerous off-the-shelf GIS packages, tools and webapps (proprietary, free, open source) that natively support OGC Web Services.

There are numerous ways to leverage OGC Web Services from GeoNode:

  • desktop GIS
  • web-based application
  • client libraries / toolkits
  • custom development

Your GeoNode lists OGC Web Services and their URLs at http://localhost:8000/developer. You can use these APIs directly to interact with your GeoNode.

The following sections briefly describe the OGC Web Services provided by GeoNode.

Web Map Service (WMS)

WMS provides an API to retrieve map images (PNG, JPEG, etc.) of geospatial data. WMS is suitable for visualization and when access to raw data is not a requirement.

WFS

WFS provides provides an API to retrieve raw geospatial vector data directly. WFS is suitable for direct query and access to geographic features.

WCS

WCS provides provides an API to retrieve raw geospatial raster data directly. WCS is suitable for direct access to satellite imagery, DEMs, etc.

CSW

CSW provides an interface to publish and search metadata (data about data). CSW is suitable for cataloguing geospatial data and making it discoverable to enable visualization and access.

WMTS

WMTS provides an API to retrive pre-rendered map tiles of geospatial data.

WMC

WMC provides a format to save and load map views and application state via XML. This allows, for example, a user to save their web mapping application in WMC and share it with others, viewing the same content.