The Alaska Department of Natural Resources (ADNR) has combined rivers for several Digital Chart of the World (DCW) tiles into one coverage. Some edits were made where arcs were missing (Taku River, near Juneau). The coverage was clipped to the State of Alaska boundary. The islands and river polygons were reselected out of the coverage for simplification. The 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. License Agreement: http://www.asgdc.state.ak.us/homehtml/esri.htm
ANDR's prupose for modifying this information was for mapping a physical base at 1:1,000,000.
Procedures_Used: This coverage was taken from ESRI's Digital Chart of the World. It is clipped to the State of Alaska. This data was extracted from the DNNET coverage for each tile that covers Alaska. For more info see - DCW Data Dictionary 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)
ground condition
It is not recommended the data be used at a scale larger than 1:1,000,000. 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: http://www.asgdc.state.ak.us/homehtml/esri.htm
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See Distribution_Information
Environmental Systems Research Institute
Unknown
Polygon and chain-node topology present.
Unknown
Unknown
The DCW DNNET data was the starting base for the statewide rivers coverage. The primary source of the DCW is the US Defense Mapping Agency (DMA) Operational Navigation Chart (ONC) series.
See Abstract and Supplimental_Information.
Coverage rvr1mil imported into geodatabase.
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Dataset copied.
Dataset copied.
Dataset copied.
Dataset copied.
Dataset moved.
Feature geometry.
ESRI
Internal feature number.
ESRI
Type of feature
ESRI - DCW
See above
ESRI- DCW
Feature geometry.
ESRI
Area of feature in internal units squared.
ESRI
CODE DESCRIPTION -------- ----------- I Islands R Rivers
The Digital Chart of the World for use with Arc/Info, Environmental Systems Research Institute, Inc. 1991
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