Surface water flow direction

Derived from a Digital Elevation Model (DEM) with the added enhancement of the photogrammetrically mapped hydrology embedded within the grid so that known hydrology is accurately represented.

Naming conventions of the grid follow the naming conventions of the Secondary and Tertiary Provincial watershed layers. The resolution of the Enhanced Flow Direction Grid is the same as the Digital Elevation Model:

  • 10m for southern Ontario (where 1:10,000 base data exists)
  • 20m for Northern Ontario (where 1:20,000 base data exists)

Official LIO title: Enhanced Flow Direction Grid - Provincial

This data set is no longer maintained by the Ministry of Natural Resources and Forestry. The data can be accessed from the Ontario Integrated Hydrology data set.

*[DEM]: Digital Elevation Model


Ontario's Open Data Team


Data Available

The data described here is available for you to use. [Learn more]
[See the licence for how you're allowed to use this data.]

Covers 2008-04-28 - 2008-04-28

Supporting Files

Additional Info

Field Value
Geographic coverage
Geography Breakdown None
Source URL/Address
Author Email
Maintainer branch
Last Validated Date 2015-04-30
Update frequency Never
Access instructions