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Service Description: This
hydrography was generalized to 1:250,000 based on Arc SEG numbers from the
original coverages.
Arc SEGS with
numbers less than 500 were identified as
1:250,000 Arcs.
The U.S.
Geological Survey (USGS) in cooperation with Federal and state agencies, and
NW Indian Tribes has produced a 1:100,000-scale River Reach data layer for
the Pacific Northwest that will serve water-resource management applications
for the next decade or more. The Pacific Northwest (PNW) River Reach Files
are a geo-referenced river reach data layer encompasses the Columbia River
Basin within the conterminous United States U.S. Environmental Protection
Agency's (USEPA) reach codes. This encoding process was a primary task of the
PNW River Reach Project. USEPA's reach identifiers are an integral hydrologic
component in regional Rivers Study known as the Northwest Environmental Data
Base(NED). NED is an ongoing effort by Federal and state agencies within the
region to compile reach-specific information on rivers in Oregon, Idaho,
Washington, Montana.
A unique
conflation algorithm was developed by the USGS-WRD in Portland, that
transferred the USEPA reach codes and other meaningful attributes from
USEPA's 1:250,000-scale RF2 Files to the 1:100,000-scale hydrography. The new
1:100,000-scale PNW Reach Files were designed so reach-specific could be
extracted from a stream network in an upstream or downstream direction using
associated feature attribute tables or within a Geographic Information
System. In Idaho, the Dept. of Water Resources uses these data in its basin
planning efforts and the Dept. Fish & Game to map information in its
Idaho River Information System (IRIS).
This data is current as of 1996.
Citation:
USGS publication
water resources investigations, Report 94-4043
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Description: This hydrography was generalized to 1:250,000 based on Arc SEG numbers from the original coverages. Arc SEGS with numbers less than 500 were identified as 1:250,000 Arcs. The U.S. Geological Survey (USGS) in cooperation with Federal and state agencies, and NW Indian Tribes has produced a 1:100,000-scale River Reach data layer for the Pacific Northwest that will serve water-resource management applications for the next decade or more. The Pacific Northwest (PNW) River Reach Files are a geo-referenced river reach data layer encompasses the Columbia River Basin within the conterminous United States U.S. Environmental Protection Agency's (USEPA) reach codes. This encoding process was a primary task of the PNW River Reach Project. USEPA's reach identifiers are an integral hydrologic component in regional Rivers Study known as the Northwest Environmental Data Base(NED). NED is an ongoing effort by Federal and state agencies within the region to compile reach-specific information on rivers in Oregon, Idaho, Washington, Montana. A unique conflation algorithm was developed by the USGS-WRD in Portland, that transferred the USEPA reach codes and other meaningful attributes from USEPA's 1:250,000-scale RF2 Files to the 1:100,000-scale hydrography. The new 1:100,000-scale PNW Reach Files were designed so reach-specific could be extracted from a stream network in an upstream or downstream direction using associated feature attribute tables or within a Geographic Information System. In Idaho, the Dept. of Water Resources uses these data in its basin planning efforts and the Dept. Fish & Game to map information in its Idaho River Information System (IRIS). This data is current as of 1996. Citation: USGS publication water resources investigations, Report 94-4043
Service Item Id: b1ea20de34244ea9a2ca64b566a5c093
Copyright Text: USGS
Spatial Reference:
PROJCS["Custom",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",2500000.0],PARAMETER["False_Northing",1200000.0],PARAMETER["Central_Meridian",-114.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",42.0],UNIT["Meter",1.0]]
Initial Extent:
XMin: 2113473.384624377
YMin: 1161042.4750050001
XMax: 2933042.1629756233
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Spatial Reference: PROJCS["Custom",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",2500000.0],PARAMETER["False_Northing",1200000.0],PARAMETER["Central_Meridian",-114.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",42.0],UNIT["Meter",1.0]]
Full Extent:
XMin: 2241684.9842
YMin: 1200073.2401
XMax: 2804830.5634000003
YMax: 1980688.5419999994
Spatial Reference: PROJCS["Custom",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",2500000.0],PARAMETER["False_Northing",1200000.0],PARAMETER["Central_Meridian",-114.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",42.0],UNIT["Meter",1.0]]
Units: esriMeters
Document Info:
Title: C:\Users\dnarsavage\AppData\Local\Temp\ArcGISProTemp20944\34c284e9-10c3-4218-919c-e8c9ec7ecad6\Untitled.aprx
Author:
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Category:
Keywords: River,Stream
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