8. Data

How accurate is flood plain mapping?

1090 views Less than a minute

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 system and from one storm event to another. Ground cover, slope, channel depth, meander, and soil drainage characteristics all play a […]

My DEM tiles are just a bunch of lines. How do I use this?

918 views Less than a minute

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 unlabeled roads. There are a few options to give context to to the surrounding area. You can take advantage of the georeferencing inherent in […]

How are contours and DEM different?

1077 views Less than a minute

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, etc.) The DEM is a representation of a topographical surface, specifically a regular grid of spot heights and break lines (noticeable changes in slope). […]

How is flood mapping different from other elevation maps?

1035 views Less than a minute

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 hydraulic analysis performed by the Conservation Authority takes into account not just the volumetric limitations of a stream corridor, but also site specific […]

What Data Is Available?

1019 views Less than a minute

Look here first. Below you’ll find an overview of what we have and which services can be used to access it.

Updates To Parcel Fabric

1584 views Less than a minute

The Ontario parcel fabric has been updated. This is the first major release provided by Teranet since August 2018. The PIN and ARN data sets include parcel geometry with either PIN or ARN as the attribute respectively.  VuMAP and MapWarehouse customers will see the updated data set posted in the next few days. Custom orders […]