Web Map Service
Web Map Service (WMS) servers provide publicly accessible geospatial data such as temperature, elevation, weather, orthoimagery, and demographics from web-based sources. The servers follow a standard developed by the Open Geospatial Consortium, Inc.® (OGC). Use WMS functions to search a database of server URLs, server titles, layer names, and layer titles and to read WMS data from servers.
This figure shows a WMS map of tropospheric ozone impacts from the NASA SVS Image Server, ETOPO1 data from NOAA, and Blue Marble: Next Generation imagery from the NASA SVS Image Server.
|Web map server|
|Web Map Service capabilities document|
|Web Map Service layer|
|Web Map Service map request|
Create WMS Maps
- Basic WMS Terminology
Learn about common terms encountered when working with Web Map Service (WMS), such as layers, capabilities documents, and WMS servers.
- Basic Workflow for Creating WMS Maps
To create a WMS map, search the WMS Database for servers and layers, request the most recent data associated with a layer, and display the data.
- Create WMS Maps When Internet Access Is Intermittent
This example shows how to create and save WMS maps, while accounting for intermittent Internet access, by reading saved WMS maps from a file.
Search for Layers
- Explore Layers on Same Server
Once you find a layer you like in the WMS Database, you can search the same WMS server for similar layers.
- Search for Layers Outside the WMS Database
This example shows how to search for layers outside the WMS Database by using a search engine in your web browser.
- Overlay Multiple Layers
These examples show how to merge multiple layers, including mixed vector and raster formats, into a single raster map.
- Add Legend to WMS Map
This example shows how to download a legend from a WMS server and add it to a WMS map.
- Animate Data Layers
These examples show how to create maps of the same geographic region at different times and view them as a movie.
- Display Animation of Radar Images over GOES Backdrop
This example shows how to display a movie of radar images collected once per hour over a backdrop.
Read WMS Maps
- Modify Your Map Request
This example shows how to modify the geographic extent and time of the requested map.
- Read WMS Maps Using Different Coordinate Reference Systems
This example shows how to read WMS maps using Web Mercator coordinates.
- Read Quantitative Data from WMS Server
These examples show how to retrieve quantitative data, for example terrain elevations, instead of an image from a WMS server.
Export WMS Layers
- Write WMS Layers to KML File
This example shows how to render a map in a non-image format such as KML.
Learn about connection errors and other common WMS server errors, and suggested workarounds.