This site will look much better in a browser that supports web standards, but it is accessible to any browser or Internet device.

CGDI online training

This online course is designed to introduce you to the various components of the Canadian Geospatial Data Infrastructure, their functionality, and the standards and specifications necessary to implement them.

more

Resources & Tools

Web Map Service

Endorsed Specification
Description
 

A Web Map Service can:

  1. Produce a map (as a picture, as a series of graphical elements, or as a packaged set of geographic feature data);
  2. Answer basic queries about the content of the map; and
  3. Tell a client what maps it can produce and which of those can be queried further.

In contrast with a Web Coverage Service, this service is not intended to provide access to the original unprocessed data.

A Web Map Service may act as a client by combining a number of images served by other WMS servers, and it may also accommodate an extension called a Styled Layer Descriptor.

It may also offer the capability to restrict which features are displayed, through the use of a filter as defined by the Filter Encoding specification.

Complete description  


CGDI Profile
 
Version
Date
Location
1.1
2009.02.16
1.0  
2005.07.20  
 
Implementation Specification
 
Version
Date
Location
1.3  
2004.01.20  
OpenGIS
03-109r1.pdf  
1.1.1  
2001.12.07  
OpenGIS
01-068r2.pdf  
1.1.0  
2001.06.21  

Geoconnections
web_map_service_1_1_0.pdf

Open Geospatial Consortium
01-047r2.pdf

 
1.0.0  
2000.04.19  
Open Geospatial Consortium
00-028.pdf
 

Status
 
2001.12.07 Endorsed by the Geoconnections Technology Advisory Panel

Other Info
 

As of 2008, version 1.1.1 was much more widely adopted among service implementations than version 1.3

Developers should be aware that version 1.3 does not support SLD, and it reverses the order in which coordinates are encoded

effective 2008.03.07