Stan Gregory, Oregon State University 20000928 v. 5 Map Corvallis, OR Pacific Northwest Ecosystem Research Consortium Version 5 replaces Version 4, which was released April 2000. Pacific Northwest Ecosystem Research Consortium 20000928 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. http://www.orst.edu/dept/pnw-erc/ 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). 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. 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. 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. 1851 1895 This version (v.5) is current as of September 28, 2000. Version 5 Further additions or edits may occur on an irregular basis. -123.73826375 -122.36342355 45.86510912 43.43544498 None Willamette Valley, Oregon Historic vegetation Pre-settlement natural vegetation The Nature Conservancy None Willamette Valley, Oregon None None Pre-European Settlement 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]. 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 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. None UNCLASSIFIED None SunOS UNIX, ARC/INFO version 7.2.1 Vector General Land Office 1851 -- 1895 platt maps, notes See related document veg1851_v5.doc Polygon topology is present. Data set is complete. Unknown. Unknown. The Nature Conservancy of Oregon Oregon Natural Heritage Program 20000919 v.5 map Portland, OR The Nature Conservancy of Oregon unknown online 18510000 19090000 publication date 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. 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. 20000928 Doug Oetter Oregon State University Faculty Research Assistant mailing and physical address

Dept. of Forest Science Oregon State University

Corvallis OR 97331 USA 541-737-8417 541-758-7760 oetter@fsl.orst.edu Vector Point 14339 String 33692 GT-polygon composed of chains 14340 Universal Transverse Mercator 10 meters North American Datum of 1927 Clarke 1866 6378206.4 Denominator_of_Flattening: 294.98 veg1851_v5.pat Polygon Attribute Table None VEGABB Vegetation class label code User Defined See related document veg1851_v5.doc User-defined TNC_GROUP Vegetation group label User Defined Based on value of VEGABB User-defined VEGTEXT1 Vegetation class brief description 1 User Defined See related document veg1851_v5.doc User-defined VEGTEXT2 Vegetation class brief description 2 User Defined See related document veg1851_v5.doc User-defined VEGTEXT3 Vegetation class brief description 3 User Defined See related document veg1851_v5.doc User-defined SYMBOL Map color shade symbol for use with colornames.shd User Defined User-defined 10 blanched almond 25 misty rose 45 deep skyblue 61 dark green 75 yellow green 77 olive drab 86 goldenrod 97 tan 99 firebrick 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. The 84 unique VEGABB codes have been collapsed into 10 TNC_GROUP codes. A brief description of the plant communities is contained in the attributes VEGTEXT1, VEGTEXT2, and VEGTEXT3. The attribute SYMBOL is a map shading code which relates to the the ARC/INFO shadeset colornames.shd. SYMBOL is based on the designations in TNC_GROUP. Oregon State University Doug Oetter Faculty Research Assistant mailing and physical address

Dept. of Forest Science Oregon State University

Corvallis OR 97331 USA 541-737-8417 541-758-7760 oetter@fsl.orst.edu VEG1851_V5 While strong efforts are made to ensure data set accuracy, complete accuracy of every data set cannot be guaranteed. Compressed archived ARC/Info workspace gzip or WinZip 2.7 Mb ftp://ftp.fsl.orst.edu/pub/pnwerc/river/veg1851_v5.tar.gz anonymous ftp none 20000928 Doug Oetter Oregon State University Faculty Research Assistant mailing and physical address

Dept. of Forest Science Oregon State University

Corvallis OR 97331 USA 541-737-8417 541-758-7760 oetter@fsl.orst.edu FGDC CSDGM FGDC-STD-001-1998 local time