These data are the complete digital hydrologic unit boundary layers for the entire state of North Dakota provided individually at the nested hierarchical units: 2-digit,...

The Watershed Boundary Dataset (WBD) from The National Map (TNM) defines the perimeter of drainage areas formed by the terrain and other landscape characteristics. The drainage...

GLA sub-region boundaries as defined in The London Plan Consolidated with Alterations since 2004. Created by merging borough boundaries into five sub regions. Note that these...

GLA sub-region boundaries as defined in the London Plan Consultation 2009. Created by merging borough boundaries into the following five sub regions: Central, North, East, South...