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Willamette Valley Pre Settlement Vegetation 1850


Original Data Basin Creation Date
2013-04-19 16:57:12
Original Data Basin Modified Date
2013-04-19 16:57:12


This map is a reinterpretation of a more extensive set of polygons demonstrating estimated original (pre 1850) vegetation types for the Willamette Valley. Vegetation type classifications were simplified and recombined for ease of comparison with currently used classifications: i.e. Shrubland, willow swamp was joined with other wetland types, though areas with that original designation can still be found using the "Information" function in ArcMap. The vegetation polygons can be laid over a basemap of current road system for use in comparing original vegetation with current vegetation status, and for locating extant remnants of original plant communities. I believe that the information contained within these polygons, generated [...]


Data Owner :
Jonathan Pope

Attached Files

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Data source
U.S. General Land Office surveyors and cartographers from 1848-1910. &nbsp;<div><br /></div> <div>Christy, J.A., E.R. Alverson, M.P. Dougherty, S.C. Kolar, C.W. Alton, S.M. Hawes, L. Ashkenas &amp; P. Minear. 2011. GLO historical vegetation of the Willamette Valley, Oregon, 1851-1910. ArcMap shapefile, Version 2011_04. Oregon Biodiversity Information Center, Portland State University.</div> <div><br /></div> <div>John Ritter, Professor of Geomantics, Oregon Institute of Technology, Klamath Falls, Oregon: John contributed by providing a one-week crash course in GIS mapping to K-12 teachers, and providing me with advice and assistance over the period of several years.&nbsp;</div>
Harvested on Fri May 23 09:36:18 MDT 2014 from Data Basin Service

Additional Information


Type Scheme Key
UniqueKey Data Basin ec12d24283554cb68c2de68c4c10dd2b

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