Thick cloud cover expressed as a percent of the photo’s coverage area is available from DigitalGlobe for archived imagery. Seasonal snow pack coverage can be seen clearly in the preview, the pro...
Why are there sometimes negative values for elevation in the DEM?
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...
I’m using the data for academic, research, or non-commercial purposes. Do you offer educational-use licensing or discounts?
For FBS’s own products such as orthophoto and elevation models, we may be able to provide such a discount. Call us to discuss what you’re planning to do. Partner data such as Teranet parce...
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...
What spectral bands are available?
Each sensor vehicle captures imagery with slightly different spectral ranges and capabilities. Imagery can be ordered as panchromatic (grayscale), natural colour (R-G-B), false colour infrared (IR-R-G...
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...
I’ve turned on some layers in VuMAP but nothing is drawing. Why?
There are two reasons why this may occur. 1. Some layers are too detailed to draw when you are zoomed out to view a large area. Below the name of each layer, you’ll see “Zoom Levels: [#-##...
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...
Can I have several tiles merged into a single file?
No problem. Choose the photos you’d like to purchase, then contact our customer service and request the photos be mosaicked. Our staff can combine the tiles into a single large image while still...