The 3 year effort to complete the Willamette Valley Land Use / Land Cover GIS data layer was completed in 1998 by the Oregon Department of Fish and Wildlife's (ODFW) Ecological Analysis Center and its NW Region Habitat Program. This 1:24,000 scale data set contains over 43,000 polygons delineating 28 land use / land cover classes for portions of seven counties in the Willamette Valley, OR. The Northwest Habitat Institute (NHI) has agreed to maintain and distribute this data set since ODFW closed its Ecological Analysis Center, and several of the NHI founders helped create this data set.
The goal of the project was to produce a high-resolution GIS vegetation map of the Willamette Valley to be used by ODFW and other wildlife and fisheries biologists.
Calendar_Date: February 1998
Currentness_Reference: publication date
Maintenance_and_Update_Frequency: None planned
Theme_Keyword: land use
Theme_Keyword: land cover
Place_Keyword: Continental USA
Place_Keyword: Willamette Valley
Place_Keyword: Pacific Northwest
Low resolution image of Willamette Valley Land Use / Land Cover map.
Data_Set_Credit: Clair Klock, Oregon Department of Fish and Wildlife.
Native_Data_Set_Environment: Intel / Windows_NT 5.0, ARC/INFO Version 8.0.1
The overall classification accuracy of this map is 81%. Some classes and areas have higher accuracy
than others. Please see the Project Report (wvveg24k.pdf) and Accuracy
Assessment Reports (wvveg24kaccass.pdf) for details.
This data set is the result of a 3-year effort involving 1:24,000 color aerial photograph
interpretation and extensive field mapping. The delineations were transferred to mylar
overlays on 1:24,000 USGS topographic and orthophoto quadrangle maps and then digitized.
For more details, please see the project report (wvveg24k.pdf).
Data set is complete for the area covered by ODFW - WAC 1993 Willamette Valley Color Aerial
Photo set at 1:24,000 resolution. The aerial photo set is housed at the ODFW N.W. Region
office (Habitat Division) in Corvallis, OR.
Horizontal_Positional_Accuracy_Report: Map. No assessment performed.
Originator: United States Geological Survey
Publication_Date: 1970 - 1995
Title: USGS 7.5-min orthophoto maps
Series_Name: 7.5-minute topographic maps
Dates of maps varied. Topographic and orthophoto maps were used.
The information depicted in this GIS layer is the result of digital image interpretation
and extensive field work. The accuracy of the information presented is limited to the
collective accuracy of the methods involved. The information is believed accurate and
reasonable efforts have been made to ensure the accuracy of the data. However, the Northwest
Habitat Institute and Oregon Department of Fish and Wildlife expressly disclaim responsibility
for damages or liability that may arise from use of this data. This product is the
property of the Northwest Habitat Institute and its use is thereby restricted.