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What is the exact spatial domain of the .asc urban extent grid? Is it from -56.0 to +84.0 *included*?

Below are the spatial domain for the 30" resolution acii, grid and bil files for GRUMPv1 Urban Extents Grid.

Asc:
* West longitude -180.000000
* East longitude 179.999856
* South latitude -56.000000
* North latitude 83.999944

Grid:
* West longitude -180.000000
* East longitude 180.008333
* South latitude -57.000000
* North latitude 84.000000

Bil:
* West longitude -180.000000
* East longitude 179.999856
* South latitude -56.000000
* North latitude 83.999944


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