veg1851_v6veg1851_v6 Metadata also available as - [Questions & Answers] - [Parseable text] - [SGML] 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: Stan Gregory, Oregon State University Publication_Date: 20020705 Title: veg1851_v6 Edition: v. 6 Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Corvallis, OR Publisher: Pacific Northwest Ecosystem Research Other_Citation_Details: Version 6 replaces Version 5, which was released in Sept. 2000 Online_Linkage: Larger_Work_Citation: Citation_Information: Originator: Pacific Northwest Ecosystem Research Publication_Date: 20000928 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 () funded by the U.S. Environmental Protection Agency under cooperative agreement with Oregon State University #CR824682. Online_Linkage: 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, Paula Minear, and Doug Oetter (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: 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 surveyor's township plat maps, historic air photos, modern soil maps, and best professional judgement based on topographic features. 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. Zipped versions of the shapefiles were transferred to OSU, where Doug Oetter converted them to ARC/INFO vector coverages, and performed subsequent edits. Version 1 appeared in the Willamette Valley Atlas version 1. Version 1.1 was completed in January, 1999. Version 2, which added significant areas to the coverage and separated wet from dry prairie, was completed December, 1999. Version 3 (January 2000) featured updates to water features and wetlands. Version 4 (April 2000) edited out unlabled polygons from v.3. Version 5 (September 2000) added new data from the Sauvie Island area. Version 6 (June 2002) differs in having (1) all polygons converted from the "stream" layer to the polygon layer, so the stream layer is now just line data, and (2) miscellaneous corrections to veg polygons that won't be obvious. 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, The Nature Conservancy, and Ed Alverson, Oregon Natural Heritage Program. 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 Word document, veg1851_v5.doc. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20020705 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -123.740569 East_Bounding_Coordinate: -122.361436 North_Bounding_Coordinate: 46.040233 South_Bounding_Coordinate: 43.435445 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Willamette Valley, Oregon Theme_Keyword: Historic vegetation Theme_Keyword: Pre-settlement natural vegetation Theme_Keyword: The Nature Conservancy Place: Place_Keyword_Thesaurus: None Place_Keyword: Willamette Valley, Oregon Stratum: Stratum_Keyword_Thesaurus: None Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: Pre-European Settlement 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, Oregon 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: UNIX Arc/Info 7.2 Cross_Reference: Citation_Information: 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 related document veg1851_v5.doc Logical_Consistency_Report: Polygon topology is present. Completeness_Report: Data set is complete. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Unknown. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Unknown. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: The Nature Conservancy of Oregon Oregon Natural Heritage Program Publication_Date: 20020705 Title: Historic ("Presettlement") Vegetation in Oregon as Recorded by General Land Office Surveyors. Edition: v.6 Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Portland, OR Publisher: The Nature Conservancy of Oregon Source_Scale_Denominator: unknown Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 18510000 Ending_Date: 19090000 Source_Currentness_Reference: publication date Source_Contribution: The Nature Conservancy of Oregon constructed a pre-settlement land cover map for the Willamette Valley by interpretting the survey notes of the General Land Office taken over a period from 1851-1909. Process_Step: Process_Description: 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 surveyor's township plat maps, historic air photos, modern soil maps, and best professional judgement based on topographic features. 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. Zipped versions of the shapefiles were transferred to OSU, where Doug Oetter converted them to ARC/INFO vector coverages, and performed subsequent edits. Process_Date: 20020705 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Doug Oetter Contact_Organization: Oregon State University 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: 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: 32937 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Label point Point_and_Vector_Object_Count: 14862 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 14862 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: 0.000512 Ordinate_Resolution: 0.000512 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: veg1851_v6.pat Attribute: Attribute_Label: AREA Attribute_Definition: Area of feature in internal units squared. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: PERIMETER Attribute_Definition: Perimeter of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: VEG1851_V6# Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: VEG1851_V6-ID Attribute_Definition: User-defined feature number. Attribute_Definition_Source: ESRI Attribute: Attribute_Label: VEGTEXTALL Attribute: Attribute_Label: VEGABB Attribute: Attribute_Label: TNC_GROUP Attribute: Attribute_Label: SYMBOL 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 is included in the related document veg1851_v5.doc. VEGTEXTALL is a text description. The 84 unique VEGABB codes have been collapsed into 10 TNC_GROUP codes. The attribute SYMBOL is a map shading code. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: 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: VEG1851_V6 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: Compressed archived ARC/Info workspace File_Decompression_Technique: gzip or WinZip Transfer_Size: 18.664 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Access_Instructions: anonymous ftp Fees: none Metadata_Reference_Information: Metadata_Date: 20020705 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Doug Oetter Contact_Organization: Oregon State University 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 Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Online_Linkage: Profile_Name: ESRI Metadata Profile Metadata_Extensions: Online_Linkage: Profile_Name: ESRI Metadata Profile Generated by mp version 2.7.3 on Fri Jul 05 23:11:19 2002