Bob Lamke revised HUC boundaries on 1:250,000 quads for State of Alaska.
Revised boundaries were digitized, edited and quads joined to complete
HUC coverage for State of Alaska. HUC coverage was joined with 1:1,000,000
outline coverage of State of Alaska. HUC numbers (HUC_CODES) and plotting
notation (LABEL) were added to HUC coverage. Plotting notations (LINE) was
added to identify Cataloging Unit, Subregional, Regional and International
This is a preliminary version, to be reviewed and revised as necessary -
November 23, 1994.
Coverage has not been reviewed to date, November 23, 1994.
Hydrologic Unit Map-1987, State of Alaska, U.S. Geological Survey.
Definitions of line coding:
Line = 1 - Cataloging Unit Boundary
Line = 2 - Sub-regional Boundary
Line = 3 - Regional Boundary
Line = 4 - International Border