Maps and Geospatial Data

"Group of neighbouring municipalities joined together for the purpose of regional planning and managing common services (such as police or ambulance services)." Detailed definition.

In Quebec, there are 98 CDs, including 81 with the same boundaries as the entity commonly known as "municipalités régionales de comté" (or MRC). Certain CDs are rather considered as territories (or "territoires équivalents", TÉs;) as are towns like Montreal and Longueuil. The figure presented below shows the comparison between the size of a CD and that of an economic region (ER).

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Census subdivisions (CSDs) have the same boundaries as towns and municipalities. It can also refer to Indian reserves or unorganized territories. There are 1 285 CSDs in the province of Quebec. Detailed definition.

The figure presented below shows an example of a CD (shaded polygon) and associated CSDs (red boundaries).

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"A dissemination area (DA) is a small, relatively stable geographic unit composed of one or more adjacent dissemination blocks with an average population of 400 to 700 persons based on data from the previous Census of Population Program. It is the smallest standard geographic area for which all census data are disseminated." There are 13,658 DAs in the province of Quebec. Detailed definition.

The figure below contains examples of CSDs (red boundaries) and DAs (green boundaries) centred on the territory of the city of Saint-Lambert, in Montérégie.

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"A dissemination block (DB) is an area bounded on all sides by roads and/or boundaries of standard geographic areas.The dissemination block is the smallest geographic area for which population and dwelling counts are disseminated." There are 106,315 dissemination blocks in the province of Quebec. Comparatively, there are 216,753 postal codes in Quebec. Detailed definition.

The following figure contains examples of DAs (green boundaries) and DBs (black dotted boundary lines) in the northern part of the city of Saint-Lambert, in Montérégie.

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"A census metropolitan area (CMA) or a census agglomeration (CA) is formed by one or more adjacent municipalities centred on a population centre (known as the core). A CMA must have a total population of at least 100,000 of which 50,000 or more must live in the core based on adjusted data from the previous Census of Population Program. A CA must have a core population of at least 10,000..." In Quebec, there are 6 CMAs and 24 CAs. Detailed definition.

Below is illustrated the CMAs of Montreal and Sherbrooke, as well as some examples of CAs in southern Quebec.

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"Census tracts (CTs) are small, relatively stable geographic areas that usually have a population of less than 10,000 persons, based on data from the previous Census of Population Program. They are located in census metropolitan areas and in census agglomerations that had a core population of 50,000 or more in the previous census." For example, there are 970 CTs in the CMA of Montreal. Detailed definition.

The figure presented below shows the CMA of Montreal, within which are illustrated in the CTs boundaries (red lines) as well as a few important cities (orange sectors) as a point of comparison.

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"A dissemination area (DA) is a small, relatively stable geographic unit composed of one or more adjacent dissemination blocks with an average population of 400 to 700 persons based on data from the previous Census of Population Program. It is the smallest standard geographic area for which all census data are disseminated." There are 13,658 DAs in the province of Quebec. Detailed definition.

The figure below contains examples of CSDs (red boundaries) and DAs (green boundaries) centered on the campus of Polytechnique Montréal.

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"A dissemination block (DB) is an area bounded on all sides by roads and/or boundaries of standard geographic areas.The dissemination block is the smallest geographic area for which population and dwelling counts are disseminated." There are 106,315 dissemination blocks in the province of Quebec. Comparatively, there are 216,753 postal codes in Quebec. Detailed definition.

The following figure contains examples of DAs (green boundaries) and DBs (black dotted boundary lines) around the campus of Polytechnique Montréal.

[Click on the map to enlarge]