Steven Sobieszczyk 2009 vector digital data http://water.usgs.gov/lookup/getspatial?insantiam_TimberChange2009 Using available aerial photos from approximately a 15-year period, changes in timber harvest were mapped in the Little North Santiam River Basin, Oregon. Timber harvest plots as seen on digital orthophotos from 1995, 2000, 2005, and 2009 were digitized and attributed based on harvest type or purpose: clearcut, thinning, or development. This data set represents four separate periods (1995; 2000; 2005; and 2009) of timber harvest change in the Little North Santiam River Basin, Oregon. Using digital orthophotos from the 4 time periods, each imagery set had observed timber harvest plots digitized and attributed. Classifications were limited to whether the timber harvest area had been clearcut (majority of trees removed), thinned (majority of trees remained), or developed (trees removed and replaced with man-made infrastructure). Land cover change and timber harvest inventory will be used for future watershed analysis in the Little North Santiam Basin. Image evaluation and feature interpretation occurred at a scale of 1:10,000. Digitization of features occurred at a scale of 1:4,000. Timber loss due to natural features, such as landslide and rock outcrop, were not included in inventory. 1995 2009 ground condition Complete As needed -122.582591 -122.174616 44.880884 44.776300 None timber harvest clearcut thinning development inlandWaters None Little North Santiam River Elkhorn Mehama Lyons Oregon Marion County None 1995 2000 2005 2009 None. The U.S. Geological Survey should be acknowledged as the data source in products derived from these data. U.S. Geological Survey Steven Sobieszczyk Hydrologist mailing and physical address

2130 SW 5th Ave.

Portland OR 97201 USA 503-251-3208 503-251-3470 ssobie@usgs.gov Warning: Although accurate at the time of production, this information may have become obsolete. See the Metadata_Reference_Information section for a current contact. http://water.usgs.gov/GIS/browse/LNsantiam_TimberChange2009.jpg Illustration of data set JPEG Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3000 Data mapped at 4:000 scale. Horizontal error was +/- 1 to 24 ft based on either LiDAR or georectified orthophoto accuracy estimates. Data are topologically correct in ArcGIS. Data are complete. U.S. Department of Agriculture and U.S. Geological Survey 1995 remote-sensing image http://gis.oregon.gov/DAS/EISPD/GEO/data/doq.shtml online 1995 publication date USGSDOQ1995 Used as digitizing basemap or source. U.S. Department of Agriculture and U.S. Geological Survey 2000 remote-sensing image http://gis.oregon.gov/DAS/EISPD/GEO/data/doq.shtml online 2000 publication date USGSDOQ2000 Used as digitizing basemap or source. U.S. Department of Agriculture and U.S. Geological Survey 2005 remote-sensing image National Agriculture Imagery Program (NAIP). 2005. Oregon colored half-meter Digital Orthophoto Quadrangle. U.S. Department of Agriculture and the U.S. Geological Survey. http://oregonexplorer.info/imagery/ online 2005 publication date USGSDOQ2005 Used as digitizing basemap or source. U.S. Department of Agriculture and U.S. Geological Survey 2009 remote-sensing image National Agriculture Imagery Program (NAIP). 2009. Oregon colored half-meter Digital Orthophoto Quadrangle. U.S. Department of Agriculture and the U.S. Geological Survey. http://oregonexplorer.info/imagery/ online 2009 publication date USGSDOQ2009 Used as digitizing basemap or source. Oregon LiDAR Consortium 2009 raster digital data online 2009 ground condition LiDAR Used as digitizing basemap or source. Digital Orthophoto Quadrangles (DOQ) for 1995 and 2000 downloaded from Oregon Geospatial Enterprise Office (GEO) at http://gis.oregon.gov/DAS/EISPD/GEO/data/doq.shtml. DOQs for 2005 and 2009 downloaded from Oregon Imagery Explorer at http://oregonexplorer.info/imagery/. USGSDOQ2009 USGSDOQ2005 USGSDOQ2000 USGSDOQ1995 2009 GIS polygon shapefile created based on DOQ projection (Oregon Lambert Conformal Conic) 2009 Using the 1995 DOQs for the Little North Santiam River Basin as a basemap, all recent timber harvest areas were digitized. Polygons were attributed based on harvest type (clearcut or thinning), primary quadrangle location, secondary quadrangle location (if applicable), date of DOQ, and polygon characteristics (perimeter, area, acres, etc.). USGSDOQ1995 2009 Digitizing was repeated for 2000, 2005, 2009 DOQs. One more classification was added for timber harvest type - development - area that was harvested and built upon. USGSDOQ2009 USGSDOQ2005 USGSDOQ2000 2009 2009 timber harvests were mapped using differential lidar grids (highest hit - bare earth: patches of land where difference was less than 5 feet tall where considered clearcut) and 2009 NAIP aerial photographs. LiDAR 2009 Vector G-polygon 311 Lambert Conformal Conic 43.000000 45.500000 -120.500000 41.750000 1312335.958005 0.000000 coordinate pair 0.000001 0.000001 international feet D_North_American_1983_HARN Geodetic Reference System 80 6378137.000000 298.257222 lnsantiam_timberchange timber harvest plots U.S. Geological Survey FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. dy Digital Orthophoto Quadrangle (DOQ) year USDA/USGS DOQ 1995 Timber harvest plots shown in 1995 photos USGS 2000 Timber harvests shown in 2000 photos not seen in 1995 photos USGS 2005 Timber harvests shown in 2005 photos not seen in 2000 photos USGS 2009 Timber harvests shown in 2009 photos not seen in 2005 photos USGS FEATURE Timber removal type USDA/USGS DOQ clearing, timber harvest clearcut stand USGS thinning, timber harvest 25% or greater trees remain after harvest USGS clearing, development clearcut stand replaced with urban development or infrastructure USGS 1992 2005 PRIM_QUAD Primary quadrangle for timber harvest classification USDA/USGS DOQ 1:24,000 Quandrangle Name/Ohio Code SEC_QUAD Secondary quadrangle for timber harvest classification USDA/USGS DOQ 1:24,000 Quandrangle Name/Ohio Code sqmi Area measurement of polygon in square miles USGS SQMI Polygon area Determined by ESRI software (ArcMap calculations) Acres Area measurement of polygon in acres USGS ACRES Polygon area Determined by ESRI software (ArcMap calculations) U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html Downloadable Data Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data, software, or related materials. The use of firm, trade, or brand names in this report is for identification purposes only and does not constitute endorsement by the U.S. Geological Survey. The names mentioned in this document may be trademarks or registered trademarks of their respective trademark owners. ESRI Geodatabase Feature Class PKZIP compression Winzip 1000 http://water.usgs.gov/GIS/dsdl/LNsantiam_TimberChange2009.zip None. This dataset is provided by USGS as a public service. 20100713 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+insantiam_TimberChange2009 FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998