Geographic Information Systems (GIS) & Mapping

Geographic Information System (GIS) 

Transportation & Planning Services is responsible for the development and delivery of Geographic Information Systems (GIS) and related mapping for County staff, local municipalities, 9-1-1 responders, various organizations and the general public.

What is GIS?

GIS provides the ability to create, update, analyze and model mapping data on the computer. The power of GIS lies in mapped data being linked to related database information for query and analysis. GIS is used by an infinite number of disciplines. In a municipal setting, GIS is used to create and maintain data such as civic addresses, roads, land parcels, water and sewer features, zoning, and more. For example: maps and data can be used to evaluate a proposed plan of subdivision to be built or to find the best location for a new school based on population projections and other variables.


The United Counties of Stormont, Dundas and Glengarry (SDG) began to implement their GIS program in 2001. Today the GIS Section provides service to all County Departments, and the local  municipalities in SDG. SDG also provides data and mapping services to 9-1-1 responders, consultants, local Conservation Authorities, special interest groups, as well as Provincial Government programs (e.g. Success by Six, Land Information Ontario (LIO) and public requests). SDG has also been involved in multi-partner projects, such as obtaining high-quality orthophotos for Eastern Ontario through DRAPE (Digital Raster Acquisition Project – East) in 2008 and in 2014.

GIS Working Group

The GIS section heads a local GIS Working Group, which involves the six local municipalities, South Nation Conservation, Raisin Region Conservation Authority, The City of Cornwall and other groups interested in collaboration. The purpose of this group is to provide an open forum for discussion on GIS data requirements, procedures and projects. Cooperation between members reduces duplication of data collection and helps define data requirements.

GIS Maps & Services

GIS maps can be downloaded in PDF format or purchased through Transportation & Planning Services. GIS custom mapping services are also available.