struct99_v2

Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Linda Ashkenas

Publication_Date: 2001

Title: struct99_v2

Edition: v2

Geospatial_Data_Presentation_Form: vector digital data

Other_Citation_Details:

Version 1 was the original coverage based solely on the USACE database. Version 2 includes the additional structures found during the river-based survey.

Online_Linkage: ftp.fsl.orst.edu\pub\pnwerc\river\

Larger_Work_Citation:

Citation_Information:

Title: PNW-ERC Willamette Basin Project

Description:

Abstract:: This dataset represents the spatial location and additional characteristics all streamside and in-channel structures in the Willamette River, Oregon, between the city of Eugene and the confluence with the Columbia River. The data were derived from a combination of tabular data obtained from the U.S. Army Corps of Engineers (ca. 1995) and a field survey performed by Oregon State University, Department of Fisheries and Wildlife personnel in 1990.
Purpose:: This dataset was created to spatially identify locations and attributes of revetments and other man-made structures (including docks, pilings, piers, wing-dams, etc) which have been constructed along the Willamette River between Eugene and Portland (confluence with the Columbia River). This coverage may be helpful in future efforts to select sites for restoration of floodplain function and in monitoring position of revetment projects.
Supplemental_Information:: Limitations of the Data: This coverage was created from two separate data sources. The initial database was created by the U.S. Army Corps of Engineers (USACE), and identified only revetments. Revetments in this database were identified in 1995 aerial photographs. This database included only those revetments within the USACE jurisdiction and omitted revetments constructed by municipalities, state and federal agencies. The field survey was designed to correct this omission. This survey was conducted by boat; survey personnel marked approximate locations of all channel and bank structures (including revetments) on aerial photographs. These hand-drawn estimates were then added on to the coverage derived from a combination of information in the USACE database, 1995 digital orthophotos and 1967 and 1986 USACE "riverbooks" (a publication of non-orthographic aerial photos with revetment locations, river mile notations, etc. drawn in). The exact spatial location of these structures may therefore be inaccurate. The database is a combination of fields obtained from the USACE and those derived from the 1999 field survey.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1999

Currentness_Reference: publication date

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -123.265156
East_Bounding_Coordinate: -122.598749
North_Bounding_Coordinate: 45.658442
South_Bounding_Coordinate: 44.051395

Keywords:

Theme:

Theme_Keyword: river structures
Theme_Keyword: revetment

Place:

Place_Keyword: Willamette River
Place_Keyword: Oregon

Temporal:

Temporal_Keyword: 1999

Access_Constraints:

Available on line; There are no restrictions for distribution of this coverage.

Use_Constraints:

See data access policy at www.fsl.orst.edu/lter/data.fr.htm (especially the data use policy)

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Linda R. Ashkenas
Contact_Organization: Dept. of Fisheries Wildlife, Oregon State University

Contact_Position: Senior Faculty Reseach Assistant

Contact_Address:

Address_Type: mailing address
Address: Dept. of Fisheries Wildlife, Oregon State University
City: Corvallis
State_or_Province: OR
Postal_Code: 9731-3803
Country: USA

Contact_Voice_Telephone: 541-737-1966

Contact_Facsimile_Telephone: 541-737-3503

Contact_Electronic_Mail_Address: linda.ashkenas@orst.edu

Contact_Instructions: please contact via email

Data_Set_Credit:

Cody Fleece of the University of Oregon created the first draft of this coverage. Tabular data was obtained from the U.S. Army Corps of Engineers. John Todd at Portland Office of U.S.A.C.E. recommended edits on preliminary coverage. Paula Minear completed edits for Version 1, January 1999. Linda Ashkenas (OSU) completed entry and edits involving river-based survey, February 2000. Doug Oetter (OSU) performed slices-based identity operation February 2001.

Security_Information:

Security_Classification: Unclassified

Native_Data_Set_Environment: arc/info 7.2

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: hand-checked for internal logical consistency

Logical_Consistency_Report: data have been hand-checked; chain-node topology present.

Completeness_Report:

This coverage includes only those structures either in the 1995 USACE revetment database and/or those noted in the 1999 river-based survey. It does not include all revetments known to have been constructed on the Willamette River prior to the 1930's. Fill permits authorized by USACE are not included in this coverage.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:: unknown; See limitations on data and notes for additional details. Horizontal accuracy is dependent upon 1995 digital orthophotos provided by USACE and prepared by Spencer Gross Mapping, Portland, Oregon.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report: unknown

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Office of the District Engineer. Portland, OR.

Publication_Date: 1967

Title: Aerial Mosaics, Willamette River,

Geospatial_Data_Presentation_Form: photobook

Publication_Information:

Publication_Place: Portland, OR
Publisher: USACOE

Source_Scale_Denominator: unknown

Type_of_Source_Media: paper

Source_Citation_Abbreviation: USACOE 1967

Source_Contribution: aerial photobook used to place arcs

Source_Information:

Source_Citation:

Citation_Information:

Originator: Office of the District Engineer,

Publication_Date: 1981

Title: IR Aerial Photography, Willamette

Edition: 1981

Publication_Information:

Publication_Place: Portland, OR
Publisher: USACOE

Source_Scale_Denominator: unknown

Type_of_Source_Media: paper

Source_Time_Period_of_Content:

Source_Currentness_Reference: 1981

Source_Citation_Abbreviation: USACOE 1981

Source_Contribution: used as reference for arc placement

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Army Corps of Engineers & Spencer B. Gross & Associates
Publication_Date: 1995
Title: digital orthophotographs of the mainstem Willamette River
Geospatial_Data_Presentation_Form: raster digital data

Source_Scale_Denominator: unknown

Type_of_Source_Media: disc

Source_Citation_Abbreviation: USACOE

Source_Contribution: used to reference arc placement

Source_Information:

Source_Citation:

Citation_Information:

Originator: OSU Dept of F&W
Publication_Date: 1999
Title: River Survey of Structures
Geospatial_Data_Presentation_Form: field survey (by boat, sucker!) & notes

Source_Scale_Denominator: unknown

Type_of_Source_Media: field data collection

Source_Citation_Abbreviation: OSU 1999

Source_Contribution: field survey of river structures and charcteristics

Process_Step:

Process_Description:

The preliminary coverage was created by Cody Fleece, University of Oregon, with subsequent edits by Paula Minear, Oregon State University. Revetments were digitized in Arc/Info using chan1995 and 1995 digitial orthophotgraphs as backcovers, with attributes from the USACE database. Positional information was provided from USACE photobooks of the Willamette River (1967 and 1981). This preliminary coverage was given to the USACE, Portland Office, for comments and editing. John Todd provided corrections in placement and/or length of revetments, and the edits were incorporated into the coverage. For the field survey of 1999, this line coverage, superimposed on the 1995 digital orthophotos, was printed onto 105 laminated pages (scale approximately 1:?????). During the actual field examination, surveyors drew in locations of all river bank and in-channel structures on these laminated pages. An additional set of field notes pertaining to structure type, composition, vegetation cover, etc was recorded for each structure. After completion of the 3 week survey, the hand-drawn lines were each given a unique identifier (struct_#). Also included were revetments from the USACE database not seen by the surveyors. A new coverage was created incorporating both the original USACE revetments (see above) and those noted by the surveyors. The surveyors arcs were digitized using the 1995 orthophotos as a backcoverage in Imagine 8.2 (?), and were attributed with the struct_#. The survey notes, including the struct_# field, were entered into a spreadsheet. This database was then joined with the coverage using the Tables command. Location by slice was performed using the identity operation in arc/info.

Source_Used_Citation_Abbreviation: USacoe 1967, USACOE 1981, USACOE 1995, OSU F&W 1999

Process_Date: 1999-2001

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Linda R. Ashkenas

Cloud_Cover: n/a

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Complete chain
Point_and_Vector_Object_Count: 617

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 4

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 10

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -123.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.000256
Ordinate_Resolution: 0.000256

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1927
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.400000
Denominator_of_Flattening_Ratio: 294.978698

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: struct99_v2.aat

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI