USGS 1:12000 (Quarter 7 1/2 Minute) Quadrangle Index

This is a mathematically generated grid in which each polygon represents one quarter of a standard USGS 7 1/2 minute quadrangle. The result is a 3 3/4 minute quadrangle layer which nests within the standard USGS quads and whose tile naming scheme includes reference to the parent quadrangles. Known as the "Quarter Quad" tile index.

Additional Info

Field Value
Last Updated December 3, 2015, 11:02
Created December 3, 2015, 11:02
dsAccessConst None
dsCurrentRef Processing occurred in 2001.
dsModifiedDate 2015-12-02 23:40:23
dsOriginator Minnesota Department of Natural Resources (DNR)
dsPurpose To provide a standard framework for accessing and creating data sets tiled by "quarter-quad."

Dataset extent