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