Corvallis Forestry Sciences Laboratory
GIS Data Dictionary
Willamette River, Oregon, Active Channel 1850
Table of Contents
IDENTIFICATION_INFORMATION
Citation
Citation_Information
Originator: Stan Gregory, Oregon State University
Publication_Date: 20000315
Title: Willamette River, Oregon, Active Channel 1850
Geospatial_Data_Presentation_Form: Digital vector coverage
Publication_Information
Publication_Place: Corvallis, OR
Publisher: Pacific Northwest Ecosystem Research Consortium
Larger_Work_Citation
Citation_Information
Originator:
Publication_Date:
Title:
Publication_Information
Publication_Place:
Publisher:
Other_Citation_Details:
This coverage was created as part of the research undertaken by the Pacific
Northwest Ecosystem Research Consortium (http://osu.orst.edu/dept/pnw-erc)
funded by the U.S. Environmental Protection Agency under cooperative
agreement with Oregon State University #CR824682.
Online Linkage:
http://www.fsl.orst.edu/pnwerc/river/
Description
Abstract:
This map was created to delineate the extent of the active channel and other
floodplain features for the Willamette River, Oregon, for the year 1850. The
extent of the active channel and features such as alcoves, secondary channels,
and islands were based on The Nature Conservancy's estimated natural
vegetation of Willamette Valley (1851) land cover digital data. Water
bodies (river and floodplain) were captured from the vegetation coverage and
interpreted for channel type.
Purpose:
This polygon coverage will be used by land managers and government entities
within the Willamette Basin to assess past changes and possible future
management impacts on the river. It will also be used as part of a
research project designed to formulate future scenarios for growth in the
Willamette Valley (Pacific Northwest Ecosystem Research Consortium,
OSU, UO, EPA).
Supplemental_Information:
Procedures_Used:
This data layer originated with The Nature Conservancy's "Provisional
Classification of 'Presettlement' Vegetation in Oregon, as Recorded by General
Land Office Surveyors" (c. 1851), a digital ARC/Info vector coverage which we
called VEG1851_V3. All the polygons labelled as water, within an areal extent
determined by the related data layer REACHES, were reselected to form a
coverage of the river and floodplain features. The related data file SLICES
was used to determine the known extent of floodplain, for the differentiation
between within floodplain and outside floodplain features.
Each water polygon was then attributed for channel code, as well as reach,
route, corner, and landmark (where appropriate). This process was
accomplished using Imagine8.3 Vector Module. Subsequent editing and clean-up
was done in ARC/Info and Imagine.
Active channel is defined as the portion of the river and floodplain
innundated at normal winter flood flows (i.e., those with an average return
interval of one to two years). The extent of this area was determined primarily
from vegetation type and presence.
Supplemental_Information:
Revisions:
This is the first version released outside the work group. No further
revisions are planned.
Time_Period_of_Content
Time_Period_Information
Range_of_Dates/Times
Beginning_Date: 18500000
Ending_Date: 20000201
Currentness_Reference: Digital vector layer creation
Status
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain
Bounding_Coordinates
West_Bounding_Coordinate: -123.2861
East_Bounding_Coordinate: -122.5762
North_Bounding_Coordinate: 45.6486
South_Bounding_Coordinate: 44.0192
Keywords
Theme
Theme_Keyword_Thesaurus: None
Theme_Keyword: Floodplain
Theme_Keyword: River channel change
Theme_Keyword: Floodplain dynamics
Place
Place_Keyword_Thesaurus: None
Place_Keyword: Willamette River
Place_Keyword: Oregon
Place_Keyword: USA
Access_Constraints: none
Use_Constraints: none
Point_of_Contact
Contact_Information
Contact_Organization: Oregon State University
Contact_Person: Doug Oetter
Contact_Position: Faculty Research Assistant
Contact_Address
Address_Type: mailing and physical address
Address: Dept. of Forest Science
Oregon State University
City: Corvallis
State_or_Province: OR
Postal_Code: 97331
Country: USA
Contact_Voice_Telephone: 541-737-8417
Contact_Facsimile_Telephone: 541-758-7760
Contact_Electronic_Mail_Address: oetter@fsl.orst.edu
Data_Set_Credit
The Nature Conservancy of Oregon, Oregon Natural Heritage Program
provided the historic vegetation and river channel information used
to construct this data layer.
Security_Information
Security_Classification_System: None
Security_Classification: Unclassified
Security_Handling_Description: None
Native_Data_Set_Environment
Arc/Info version 7.2.1
/data/ibis/final/channel/ac1850p
Cross_Reference
Originator: The Nature Conservancy of Oregon
Publication_Date: 20000201
Title: Natural Vegetation of the Willamette Valley c. 1851
Edition: v.3
Geospatial_Data_Presentation_Form: map
Publication_Information
Publication_Place: Portland, OR
Publisher:
Source_Scale_Denominator: unknown
Type_of_Source_Media: Digital vector coverage
DATA_QUALITY_INFORMATION
Attribute_Accuracy
Attribute_Accuracy_Report:
Features in this data set are located using the Universal
Transverse Mercator coordinate system and conform to Level 2
of FIPS 173 (4.1.3.5 Spatial Registration).
Logical_Consistency_Report:
Polygon and arc-node topology exists.
Completeness_Report:
Data set is complete.
Positional_Accuracy
Horizontal_Positional_Accuracy
Horizontal_Positional_Accuracy_Report:
Horizontal positional accuracy is unknown.
Vertical_Positional_Accuracy
Vertical_Positional_Accuracy_Report:
Vertical positional accuracy is unknown.
Lineage
Source_Information
Source_Citation
Originator: The Nature Conservancy of Oregon
Publication_Date: 20000201
Title: Natural Vegetation of the Willamette Valley c. 1851
Edition: v.3
Geospatial_Data_Presentation_Form: Digital vector coverage
Publication_Information
Publication_Place: Portland, OR
Publisher:
Source_Scale_Denominator: unknown
Type_of_Source_Media: digital vector coverage
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1850000
Ending_Date: 20000201
Source_Currentness_Reference: Digital vector coverage
Source_Citation_Abbreviation:
Source_Contribution:
The Nature Conservancy of Oregon created a characterization of the
1850 Willamette river channel.
Process_Step
Process_Description:
Creation of AC1850P from the digital vector coverage of the 1851
natural vegetation of the Willamette valley was performed by reselection
and editing of the water polygons in the vegetation coverage.
Process_Date: 20000201
Process_Contact
Contact_Information
Contact_Organization: Oregon State University
Contact_Person: Doug Oetter
Contact_Position: Faculty Research Assistant
Contact_Address
Address_Type: mailing and physical address
Address: Dept. of Forest Science
Oregon State University
City: Corvallis
State_or_Province: OR
Postal_Code: 97331
Country: USA
Contact_Voice_Telephone: 541-737-8417
Contact_Facsimile_Telephone: 541-758-7760
Contact_Electronic_Mail_Address: oetter@fsl.orst.edu
Cloud_Cover:
SPATIAL_DATA_ORGANIZATION_INFORMATION
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information
SDTS_Terms_Description
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 342
SPATIAL_REFERENCE_INFORMATION
Grid_Coordinate_System
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal Transverse Mercator (UTM)
UTM_Zone_Number: 10
Planar_Coordinate_Information
Planar_Coordinate_Encoding_Method: Coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 1 m
Ordinate_Resolution: 1 m
Planar_Distance_Units: METERS
Geodetic_Model
Horizontal_Datum_Name: North American Datum 1927
Ellipsoid_Name: CLARKE1866
Semi-major_Axis: 6378206.4
Denominator_of_Flattening_Ratio: 294.98
ENTITY_AND_ATTRIBUTE_INFORMATION
Detailed_Description
Entity_Type
Entity_Type_Label: ac1850p.pat
Entity_Type_Definition: Polygon Attribute Table
Entity_Type_Definition_Source: None
Attribute
Attribute_Label: REACH
Attribute_Definition: Indication of river reach
Attribute_Definition_Source: User Defined
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum: 1
Range_Domain_Maximum: 7
Attribute_Domain_Values
Codeset_Domain
Attribute_Code: 1
Definition: Mouth to Willamette Falls, 0-36
Attribute_Code: 2
Definition: Willamette Falls to Molalla Confluence, 37-50
Attribute_Code: 3
Definition: Mollalla Confluence to Newberg, 51-71
Attribute_Code: 4
Definition: Newberg to Salem, 72-110
Attribute_Code: 5
Definition: Salem to Albany, 111-151
Attribute_Code: 6
Definition: Albany to Harrisburg, 152-201
Attribute_Code: 7
Definition: Harrisburg to Middle Fork Confluence, 202-227
Attribute
Attribute_Label: CODE
Attribute_Definition: Channel type code
Attribute_Definition_Source: User Defined
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum: 1
Range_Domain_Maximum: 11
Attribute_Domain_Values
Codeset_Domain
Attribute_Code: 1
Definition: Main active channel.
Attribute_Code: 3
Definition: Sloughs, alcoves where one end is connected to main channel.
Attribute_Code: 5
Definition: Side or secondary channel. Both ends connect to main channel.
Attribute_Code: 6
Definition: Remnant river feature -- within known floodplain. Disconnected
floodplain lakes, sloughs. No apparent connection to main river,
but within historical floodplain area based flood extent coverage.
Attribute_Code: 7
Definition: Remnant river feature -- outside known floodplain. Disconnected
floodplain lakes, sloughs. No apparent connection to main river,
and outside historical floodplain area based flood extent coverage.
Attribute_Code: 10
Definition: Tributary to Willamette River.
Attribute_Code: 11
Definition: Islands.
Attribute
Attribute_Label: DESCRIPTION
Attribute_Definition: Associated place name or river feature
Attribute_Definition_Source: User Defined
DISTRIBUTION_INFORMATION
Distributor
Contact_Information
Contact_Organization: Oregon State University
Contact_Person: Doug Oetter
Contact_Position: Faculty Research Assistant
Contact_Address
Address_Type: mailing and physical address
Address: Dept. of Forest Science
Oregon State University
City: Corvallis
State_or_Province: OR
Postal_Code: 97331
Country: USA
Contact_Voice_Telephone: 541-737-8417
Contact_Facsimile_Telephone: 541-758-7760
Contact_Electronic_Mail_Address: oetter@fsl.orst.edu
Resource_Description:
AC1850P
Distribution_Liability:
While strong efforts are made to ensure data set accuracy,
complete accuracy of every data set cannot be guaranteed.
Standard_Order_Process
Digital_Form
Digital_Transfer_Information
Format_Name:Gzipped ARC/Info Interchange file
Digital_Transfer_Option
Online_Option
Computer_Contact_Information
Network_Address: ftp.fsl.orst.edu
Network_Resource_Name:
/pub/pnwerc/river/ac1850p.e00.gz
Access_Instructions: anonymous ftp
Fees: none
METADATA_REFERENCE_INFORMATION
Metadata_Date: 20000315
Metadata_Review_Date:
Metadata_Contact
Contact_Information
Contact_Organization: Oregon State University
Contact_Person: Doug Oetter
Contact_Position: Faculty Research Assistant
Contact_Address
Address_Type: mailing and physical address
Address: Dept. of Forest Science
Oregon State University
City: Corvallis
State_or_Province: OR
Postal_Code: 97331
Country: USA
Contact_Voice_Telephone: 541-737-8417
Contact_Facsimile_Telephone: 541-758-7760
Contact_Electronic_Mail_Address: oetter@fsl.orst.edu
Metadata_Standard_Name: FGDC CSDGM
Metadata_Standard_Version: 19940608