Alaska rivers (1:1,000,000) were clipped to Copper River basin by Ecotrust and polygon features were dropped in the new coverage.
Unlike Alaksa rivers 1:2,000,000, this coverage does not have centerlines running through rivers with two lines (shorelines) representing the river.
The original river data were combined from the DNNET coverages comprising the following 5 degree by 5 degree tiles for Alaska:
AK 12,22,23,32,33 AL 21,31,32 BK 12,13,22,23,33 BL 11,12,13,21,22,23,31,32,33 CK 12,23,33 CL 11,12,13,21,22,23,31 DK 12,13,22,23 ZK 22,32
Please note: Portions of this product include intellectual property of ESRI and are used herin with permission. Copyright (c) 1992 Environmental Systems Research Institute, Inc. All rights reserved.<URL:http://www.asgdc.state.ak.us/homehtml/esri.htm>License Agreement
Revisions: 02/25/98 - D. Mortenson Renamed from dcw_rivers or $DCW_RIVERS to rvr1mil.
01/10/97 - M. Gorham Performed a clean on cover.
12/18/96 - D. Mortenson Taku River (near Juneau) was missing some of its arcs. Added some arcs to fill in where it should be.
Notes: Date Received: 8/93 Verified: E. Kenning Documented by: E. Kenning 6/94 To use the ARCs for this coverage: ---------------------------------- UNSEL $DCW_RIVERS line dnlntype = 99 (this will remove all connectors between rivers-lakes and oceans)
To use the POLYs for this coverage: ----------------------------------- RESEL $DCW_RIVERS poly type = R (this will select all the RIVER polys)
UNSEL $DCW_RIVERS poly type = I (this will unselect all the ISLAND polys)
Any hardcopies utilizing these data sets shall clearly indicate their source. If the user has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. User specifically agrees not to misrepresent these data sets, nor to imply that changes they made were approved by Alaska Department of Natural Resources.
ESRI License Agreement:<URL:http://www.asgdc.state.ak.us/homehtml/esri.htm>
ARCS - DNLNTYPE DESCRIPTION -------- ----------- 1 Streams, rivers, channelized rivers 2 Inland shorelines 8 Connectors (used to separate inland water from open ocean or ocean ice. It is derived from the border between the shade for inland water - dark blue, and open ocean or ocean ice - light blue - on the ONC sheets. 99 None
DNLNSTAT DESCRIPTION -------- ----------- 1 Perennial (used for streams only) 2 Non-perennial (used for streams only) 3 Definite (used for inland shorelines only) 88 ONC module boundary 99 None - no status attribute associated w/ feature.