MapWarehouse

What format is groundwater data offered in?

Moraine groundwater are presented as asc files (ASCII grid). The asc file is a raster dataset similar to an image, where each pixel value represents an elevation value rather than a colour. Each of th...

What are the intervals of the contours?

The contours provided in tiles by FBS on MapWarehouse are in 1m intervals. In any area where high resolution orthophoto is available, it is usually possible to produce a more detailed elevation model....

What’s floodplain mapping?

Floodplain mapping defines the limits of the Regulatory Floodplain for a particular watershed, used for regulatory purposes. These maps are produced and maintained by the TRCA (Toronto and Region Cons...

Where can I find historical imagery?

MapWarehouse has digital photo dating back to 2000. Older photo taken on film can be sourced on a case by case basis by contacting our customer service.

How accurate is flood plain mapping?

The information shown on this map series is subject to change. The volume of water introduced into a regional drainage system from rain and snow melt can vary wildly between different points in the sy...

How are contours and DEM different?

The DEM capture was produced from 2002 orthophoto at 1:10,000. It includes elevations on a 40m grid spacing together with break lines along all visible terrain impacting features (road edges, drainage...