Some tiles have 1000m vertical shift applied, to work with a different global origin. For example, a value of -800m should be considered +200m.
How is flood mapping different from contour or topo mapping?
Other elevation models are simply a record of the elevations across an area. Modeling and flooding predictions made by any agency other than the Conservation Authority are of no regulatory effect. The...
What’s the difference between contours and DEM?
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...
I thought I was getting a complete map but this file is just a bunch of lines. Where are the road labels and other features?
Only elevation information is included, either as DEM or contour, depending on the file you’ve chosen. The road edges frequently appear as break lines in the DEM, giving the appearance of unlabe...
What’s the positional accuracy of the elevation data?
In the 2002 Golden Horseshoe data set, the horizontal and vertical accuracy is +/- 40 cm, and +/- 80 cm for the 2002 Simcoe-Kawartha data set. This means that the difference between the true elevation...
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...
What are the intervals of the contours? Can I get sub-metre intervals?
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....
How do I use LiDAR?
LiDAR (Light Detection And Ranging) bare earth elevation models in GeoTiff format are easy to use and highly accurate. This video will help you get started.
How do I order hard copy prints of custom photo maps?
FBS can produce large format custom printing of our digital data products. These printed maps typically include a large map portion with orthophoto, road labels and property lines, and a title block c...