Topographic Mapping – Impermeable Surface

  • The Impermeable Surface dataset is a 1-bit raster indicating mainly artificial structures

o Pixel values of 0 indicate impermeable land

o Pixel values of 1 indicate permeable land

  • Impermeable surfaces will not absorb water, and will instead cause surface runoff of water

  • Permeable surfaces will absorb water

Please note: Data was derived from remotely sensed multispectral optical data. Data is limited to the City of Toronto geographic boundary. The methodologies used in this process are under development, and known artefacts and omissions exist within it. Data is intended for planning use only, not to be used as a replacement for rigorous field inspection and validation.

Data and Resources

Additional Info

Field Value
Dataset Category Document
Refresh Rate As available
Collection Method
Excerpt Permeable vs Impermeable land raster with 0.5m ground resolution, derived from remotely sensed multispectral imagery.
Limitations
Owner Division Information & Technology
Owner Section
Owner Unit
Owner Email gcc@toronto.ca
Author Email gcc@toronto.ca
Maintainer Email gcc@toronto.ca
Author gcc@toronto.ca
Civic Issues Mobility
Formats ZIP
Topics
  • Locations and mapping
  • Environment
  • Development and infrastructure
Source
Information URL
Image URL
Last Updated 2019-07-23 20:08:39.088138
Is Retired? False
Date Published 2019-07-23 17:35:42.155487