(Company logo) ISE GIS Research Lab


Metadata for VEG1851_V4

Table of Contents

Identification_Information
     Abstract 
     Purpose 
     Supplemental Information 
Data_Quality_Information
Spatial_Data_Organization_Information
Entity_and_Attribute_Information
     Detailed Description
     Overview 
Distribution_Information
Metadata_Reference_Section


Identification_Information

Citation_Information Originator: Publication_Date: Title:

Description Abstract This polygon coverage depicts "presettlement" vegetation in Oregon as described by surveyors for the General Land Office between 1851 and 1909, when surveying township and section lines. Most low-elevation sites with arable land were surveyed between 1851 and 1865, while most foothill and mountainous areas were surveyed between 1865 and 1895. Coverage currently includes the entire Willamette Valley and surrounding foothills, most of the tributary valleys of the McKenzie, Tualatin, and Yamhill rivers. The project, initiated in 1993, has to date been funded by the Oregon Division of State Lands, the Bureau of Land Management, the Environmental Protection Agency, the Army Corps of Engineers, the Bonneville Power Administration, the Oregon Community Foundation, The Nature Conservancy, and the City of Portland. The Principal Investigator is John A. Christy (Oregon Natural Heritage Program, The Nature Conservancy of Oregon), with GIS management by Linda Ashkenas and Paula Minear (Oregon State University). Purpose The coverage was created to identify the types of vegetation present and to quantify their extent at the time of survey. In most cases, Vegetation present at the time of survey is a close approximation of vegetation prior to widespread changes wrought by Euroamerican settlement. Supplemental_Information Procedures_Used Coverage was created at 1:24,000 using databased transcriptions of survey notes for township and section lines, with standard USGS 7.5 topographic maps as a base. When resurveys offered more than one data set for a given line, data from the earliest survey were used whenever possible. Survey data for meander lines deviating from section lines, and for Donation Land Claim boundaries, were not used in this study. Vegetation types were defined by descriptors used in the survey notes, supplemented when needed by distances to witness trees as recorded in the notes. Coverage was delineated using distances recorded as points along the survey lines. Vegetation in the interiors of sections was delineated using features depicted on the surveyorstownship plat maps, historic air photos, modern soil maps, and best professional judgement based on topographic features. In Version 2.0, wet prairie (VEGABB=PW) was separated from dry, (upland) prairie (VEGABB=PU) based on contemporary soil maps combined with the original surveyors notes. This procedure added considerable detail in the southern end of the Willamette Valley. This operation was performed by John Christy and John Hak at The Nature Conservancy, Oregon Natural Heritage Program. Mylars were digitized by hand early in the project, and later scanned directly into ArcInfo using the ArcScan module. Once in ArcInfo the polygon coverage was built or cleaned with a fuzzy tolerance of 1 meter and polygons were attributed with the veg abbreviation. Edgematching and elimination of sliver polygons was done by hand to avoid losing tiny polygons that were necessary to the coverage (gravel bars, etc.) Department of Corrections, Division of State Lands, and Oregon State University (Department of Fisheries and Wildlife) have all assisted with digitizing of these topo quads. The final editing was performed at TNC by John Christy and John Hak. A zipped version of the shapefile was sent to OSU, where Doug Oetter converted it to a coverage format. Documentation was completed by Linda Ashkenas in December, 1999. Revisions Version 1.0 appeared in the Willamette Valley Atlas version 1 Version 1.1 was completed in January, 1999. Version 2.0, which added significant areas to the coverage and separated wet from dry prairie, was completed December, 1999. Reviews_Applied_to_Data This coverage has topology, as evidenced by build process, and was cross-checked by GIS technicians at OSU,FSL, and State Corrections. Plots were checked and edited by John Christy and Ed Alvorsen, The Nature Conservancy, Natural Heritage Program. Related_Spatial_and_Tabular_Data_Sets A section line coverage, prepared by Atterbury & Assoc., was used as the grid for placement of survey notations along section lines. It is available from the Oregon State Service Center for GIS. For proper interpretation of vegetation communities identified in this coverage, refer to the associated look up table, veg1851.lut References_Cited Notes Time_Period_of_Content Range_of_Dates/Times Beginning_Date: 1851 Ending_Date: 1895 Currentness_Reference This version is current as of January 12, 1999. Status Progress: Version 4.0 Maintenance_and_Update_Frequency Further edits are anticipated on an irregular basis. Spatial_Domain Bounding_Coordinates West_Bounding_Coordinate: -123.73826375 East_Bounding_Coordinate: -122.36342355 North_Bounding_Coordinate: 45.86510912 South_Bounding_Coordinate: 43.43544498

Keywords Theme Theme_Keyword_Thesaurus: None Theme_Keyword: Willamette Valley, vegetation, pre-settlement, TNC Place Place_Keyword_Thesaurus: None Place_Keyword: Willamette Valley, Oregon Stratum Stratum_Keyword_Thesaurus: None Stratum_Keyword: Temporal Temporal_Keyword_Thesaurus: None Temporal_Keyword:

Access_Constraints This coverage will be edited by Nature Conservancy botanists and revised further as mapping proceeds. DO NOT COPY OR CITE THIS VERSION WITHOUT FIRST CONTACTING THE PRINCIPAL INVESTIGATOR, JOHN A. CHRISTY [OREGON NATURAL HERITAGE PROGRAM, 503.731.3070 x342]. Use_Constraints Data along section lines are generally accurate, although some survey lines were abandoned after subsequent resurveys. Vegetation in the interiors of sections was delineated using secondary sources, and these coverages will not meet current map standards. Surveyors township plat maps, while accurately depicting points along survey lines, provide only sketches of features in the interiors of sections, and do not meet map standards. The same holds true for modern soil maps, which depict approximate boundaries of given soil types, based on limited sampling and interpretation of topography. We estimate map accuracy of position be within 10 meters along section lines, if section corners are the same as at the time of survey, and 100-300 meters in the interiors of sections, depending on topographic features.

Data_Set_Credit Data should be credited to: John A. Christy, Edward R. Alverson, Molly P. Dougherty and Susan C. Kolar, Oregon Natural Heritage Program, The Nature Conservancy of Oregon. GIS processes should be credited to Oregon State University Department of Fisheries and Wildlife, Department of Corrections, and Oregon Division of State Lands. Security_Information Security_Classification_System: None Security_Classification: UNCLASSIFIED Security_Handling_Description: None

Native_Data_Set_Environment: SunOS UNIX, ARC/INFO version 7.2.1

Cross_Reference Originator: General Land Office Publication_Date: 1851 -- 1895 Publication_Time: Title: Land Surveys Edition: Geospatial_Data_Presentation_Form: platt maps, notes Series_Information Series_Name: Issue_Identification: Publication_Information Publication_Place: Publisher: Other_Citation_Details: Online_Linkage: Larger_Work_Citation:


Data_Quality_Information

Attribute_Accuracy Attribute_Accuracy_Report: See Entity_Attribute_Information

Quantitative_Attribute_Accuracy_Assessment Attribute_Accuracy_Value: See Explanation Attribute_Accuracy_Explanation: Attribute accuracy is described, where present, with each attribute defined in the Entity and Attribute Section.

Logical_Consistency_Report: Polygon topology present.

Completeness_Report (Information on selection criteria, generalization, deliberate omissions, definitions, and other rules applied to create the dataset.) Positional_Accuracy Horizontal_Positional_Accuracy Horizontal_Positional_Accuracy_Report: (An explanation of the accuracy of the horizontal coordinate measurements and a description of tests used to determine the horizontal positional accuracy. Positional accuracy defines how correctly the digital features match real-world features. It is related to the concept of the National Map Accuracy Standard and states xx% of well-defined point features fall within xx units of their true position. NOTE: This is different from the horizontal resolution as reported in the .DOC file. Resolution is the size of the smallest feature that can be represented in the plane or on a surface. It is a term used primarily with the digital representation of geographic data.)
Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: unknown Horizontal_Positional_Accuracy_Explanation: Resolution as reported
Vertical_Positional_Accuracy Vertical_Positional_Accuracy_Report: An explanation of the accuracy of the vertical coordinate measurements; these may be encoded with a two-dimensional feature; for example, cell estimates. A description of the contour interval of the input data and its basis can be described here.) Lineage: See Supplemental_Information for overview.

Process_Steps Process_Step Process_Description: OETTER REGIONCLEAN XX194321 XX194321 Source_Used_Citation_Abbreviation:None Process_Date: 20000127 Process_Time: 1945 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER DROPFEATURES XX194321 REGION.* Source_Used_Citation_Abbreviation:None Process_Date: 20000127 Process_Time: 2013 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER RESELECT XX194321 VEG1851_V3 Source_Used_Citation_Abbreviation:None Process_Date: 20000127 Process_Time: 2014 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER LABELERRORS VEG1851_V3 Source_Used_Citation_Abbreviation:None Process_Date: 20000127 Process_Time: 2014 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER CREATELABELS VEG1851_V3 Source_Used_Citation_Abbreviation:None Process_Date: 20000127 Process_Time: 2014 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER BUILD VEG1851_V3 Source_Used_Citation_Abbreviation:None Process_Date: 20000127 Process_Time: 2020 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER PROJECTDEFINE COVER VEG1851_V3 Source_Used_Citation_Abbreviation:None Process_Date: 20000129 Process_Time: 1856 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER COPY VEG1851_V3 CHANNEL/VEG1851_V3 Source_Used_Citation_Abbreviation:None Process_Date: 20000129 Process_Time: 2053 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER COPY CHANNEL/VEG1851_V3 VEG/VEG1851_V3 Source_Used_Citation_Abbreviation:None Process_Date: 20000129 Process_Time: 2056 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER DOCUMENT VEG1851_V3 COPY /DATA/IBIS/TNC_DSL/VEG1851 OETTER Source_Used_Citation_Abbreviation:None Process_Date: 20000201 Process_Time: 1432 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER BUILD VEG1851_V3 Source_Used_Citation_Abbreviation:None Process_Date: 20000424 Process_Time: ' 6' Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER LABELERRORS VEG1851_V3 Source_Used_Citation_Abbreviation:None Process_Date: 20000424 Process_Time: 28 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER BUILD VEG1851_V3 Source_Used_Citation_Abbreviation:None Process_Date: 20000424 Process_Time: 30 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER LABELERRORS VEG1851_V3 Source_Used_Citation_Abbreviation:None Process_Date: 20000424 Process_Time: 1950 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER LABELERRORS VEG1851_V3 Source_Used_Citation_Abbreviation:None Process_Date: 20000424 Process_Time: 1951 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER BUILD VEG1851_V3 Source_Used_Citation_Abbreviation:None Process_Date: 20000424 Process_Time: 2001 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER ELIMINATE VEG1851_V3 VEG1851_V4 KEEPEDGE POLY Source_Used_Citation_Abbreviation:None Process_Date: 20000503 Process_Time: 1254 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER BUILD VEG1851_V4 Source_Used_Citation_Abbreviation:None Process_Date: 20000503 Process_Time: 1300 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: EXTERNALALL Source_Used_Citation_Abbreviation:None Process_Date: 20000509 Process_Time: 1639 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER EXPORT COVER VEG1851_V4 VEG1851_V4 Source_Used_Citation_Abbreviation:None Process_Date: 20000523 Process_Time: 1238 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER DOCUMENT VEG1851_V4 COPY /DATA/HAMMER/DOUG/RIVER/VEG/VEG1851_V3 OETTE Source_Used_Citation_Abbreviation:None Process_Date: 20000524 Process_Time: 1528 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER DOCUMENT VEG1851_V4 UPDATE OETTER Source_Used_Citation_Abbreviation:None Process_Date: 20000524 Process_Time: 1539 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: OETTER DOCUMENT VEG1851_V4 UPDATE OETTER Source_Used_Citation_Abbreviation:None Process_Date: 20000524 Process_Time: 1731 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: ALLANB BUILD VEG1851_V4 Source_Used_Citation_Abbreviation:None Process_Date: 20000525 Process_Time: 900 Source_Produced_Citation_Abbreviation: None

Cloud_Cover (The area of a dataset, obtained from aerial photographs and remotely sensed images, which is obstructed by clouds. Cloud cover is typically expressed as Sa percentage of the spatial extent of the dataset.)


Spatial_Data_Organization_Information

Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information SDTS_Terms_Description SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 14088 SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 33171 SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains' Point_and_Vector_Object_Count: 14089


Spatial_Reference_Information

Horizontal_Coordinate_System_Definition
    Planar
        Grid_Coordinate_System
        Grid_Coordinate_System_Name: Universal_Transverse_Mercator (UTM)
           Zone_Number: 0
        Planar_Distance_Units: meters
    Geodetic Model
        Horizontal_Datum_Name: North American Datum of 1927
        Ellipsoid_Name:  Clarke 1866
        Semi-major_Axis: 6,378,206.4
        Denominator_of_Flattening: 294.98


Entity_and_Attribute_Information

Detailed_Description

Overview_Description Entity_and_Attribute_Overview Codes have been assigned to designate each unique type of vegetation community, as delineated by VEGABB attribute in the .pat of this coverage. A complete listing and description of each category may be obtained from The Nature Conservancy. Also, refer to the lookup table for similar information. A brief description of the plant communities is contained in the attributes VEGTEXT1, VEGTEXT2, and VEGTEXT3. Entity_and_Attribute_Detail_Citation: Not Available


Distribution_Information

 
 

Metadata_Reference_Section

Metadata_Date: 19000524 Metadata_Contact: Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: 19940608 Metadata_Time_Convention: Local Time Metadata_Security_Information: Metadata_Security_Classification_System: None Metadata_Security_Classification: UNCLASSIFIED Metadata_Security_Handling_Description: None

Last modified: 00-06-05.14:33:44.Mon