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State
12 Digit Hydrologic Unit 2006 (polygon)
State of Arkansas —
This data set is a complete digital hydrologic unit boundary layer to the Subwatershed (12-digit) 6th level for the State of Arkansas. This data set consists of geo-... -
University
New Mexico HUC-12 Boundaries - 2013
Earth Data Analysis Center, University of New Mexico —
This data set is a complete digital hydrologic unit boundary layer to the subwatershed (12-digit) 12th level for the State of New Mexico. This data set consists of...