DF02001 Super-old growth study sample site locations for supplemental field work (Sept. 2002 )
Sample site locations recorded with GPS unit. Table created in MS Excel with UTM x-y coordinates of sites. Point shapefile created from table of coordinates.
projected from NAD27 to NAD83
DF02002: Fire history studies used for super-old growth study, Giglia et. al. 2003, synthesis from Morrison & Swanson (unpublished); Teensma (1987); Weisberg (1998) and Giglia (unpublished) supplemental data,sample site locations
Elevation class was derived from a spatial join with "gen_aspect" shapefile and refers to the slope position in relation to proximal high ridges.
This shapefile was created by merging the following shapefiles: giglia_allsites; m&s_unpub_allsites; teensma_allsites; weisberg_allsites. Attributes merged were: researcher, x and y coordinates and SOG presence/absence.
Slope class was derived from a spatial join with "slope_class" shapefile and refers to the slope angle classified by degrees.
Site elevation was derived from a spatial join between site point locations and a 20m contour layer.
General aspect was derived from a spatial join with "gen_aspect" shapefile and refers to the general aspect of a slope, ignoring microtopography.
Fire chronology data were aggregated to century-scale and classified by severity as follows: Severity Class codes included from Class codes included from code:
Definition: M & S/Teensma fire chron. Weisberg fire chron.
H hi-severity fire occurred at least once 3, 4 5,7
M mixed-severity fire occured at least once 5 4
L low-severity fire occured at least once 1,2 1,2
S site not included in previous fire chronologies, but refer to sites where SOG exists; assumption is made that SOG post-dates high-severity fire. The fire chronologies referred to above are in ms excel format: "BRCHRONO" (DF15) and "brmfc" - see Don Henshaw..
DF02003: Super-old growth study area boundary
Area is the extent of super-old growth studies by Giglia, Morrison and Swanson, Teensma, and Weisberg. The extent of the sample locations was extended out to the watershed level, with some extended area of interest to the North and East.
Boundaries taken from existing watershed bounaries with extended areas digitized on-screen.
DF02004: Super-old growth study area boundary, divided into sub basins
Study area was divided into 8 "sub-areas", defined by watershed boundaries. Divisions were hand-drawn on-screen.
DF02005: Patches of terrain that fit the predictive model for SOG, have been harvested since 1977, and have not been previously sampled
Shapefile "clip_wnfveg6.shp" queried for areas that were harvested 1977 or later.
Shapefile "naspect_slope1" was intersected with the selection from step 1 query.
Intersection from step 2 was queried for patches that did not contain sample sites. This outcome was converted to a shapefile.
DF02006:Reclassified grid with four quadrant aspect classes and three slope position classes, generated from 10 meter DEM
Aspect grid layer derived from 10m DEM. Reclassified into 4 quadrants: NE,SE,SW, NW. New polygon layer created by drawing polygons around areas between ridgelines and stream valleys, classified by quadrant, ignoring microtopography.
DF02007: Shapefile "gen_aspect.shp" queried for NW and NE aspects. Shapefile "slope_class" queried for slope class "1" (0-15 degrees). Selections from the two shapefiles intersected to create this shapefile.
DF02008: Reclassified 10m DEM into 4 elevation classes: 480-680m; 700-980m; 1000-1280m; and 1300-1540m. Converted to shapefile.
DF02009: Shapefile created from reclassified grid with three elevation classes. Reclassified 10m DEM into 4 elevation classes: 480-680m; 700-980m; 1000-1280m; and 1300-1540m. Converted to shapefile.
DF02010: Downloaded 9 DEMs from Regional Ecosystem Office Geospatial Center (www.reo.gov): Belknap, Blue River, Carpenter Mountain, Echo Ridge, Harter Mountain, McKenzie Bridge, Tamolitch, Tidbits Mountain and Upper Soda. Merged DEMs with lattice function in ArcInfo.
Latticed 9 DEMs with ArcInfo software.
DF02011: Created by WNF using aerial photography and satellite imagery. (Willamette National Forest Veg6) Clipped to boundary of super-old growth study boundary by S. Giglia. Full metadata for current vegetation can be found at the following link: http://www.fs.fed.us/r6/willamette/manage/gis/veg8.htm
DF02012: Sample site locations digitized on large format digitizing table from mylar maps. Point shapefile created from digitized data. dbf file derived from fire chronology created by Peter Weisberg was joined to the shapefile. A new shapefile was then created to make fire chronology attributes a permanent part of the attribute table.
DF02013: Study area boundary digitized from scanned map from Morrison & Swanson (1990). Process_Date: June 2003
DF02014: Boundary digitized from scanned copy of map from Morrison & Swanson (1990) fire history study.
DF02015: This shapefile was created by merging the following shapefiles: giglia_allsites; m&s_unpub_allsites; teensma_allsites; weisberg_allsites. Attributes merged were: researcher, x and y coordinates and SOG presence/absence.
A sub-set of the master shapefile ("sogstudy_allsites") with locations only of sites where SOG was found. All attribute data from master shapefile was carried forward, and additional data added, including available age-class data and tree-level data.
Site elevation was derived from a spatial join between site point locations and a 20m contour layer. Fire chronology data were aggregated to century-scale and classified by severity as follows:
Elevation class was derived from a spatial join with "gen_aspect" shapefile and refers to the slope position in relation to proximal high ridges. Slope class was derived from a spatial join with "slope_class" shapefile and refers to the slope angle classified by degrees. General aspect was derived from a spatial join with "gen_aspect" shapefile and refers to the general aspect of a slope, ignoring microtopography.
DF02016: These point locations were digitized from the study area map in Teensma's 1987 publication. Spatial accuracy is unknown.
Study area map was scanned and point locations digitized on-screen.
DBF file derived from fire chronology created by Peter Weisberg was joined to the shapefile. A new shapefile was then created to make fire chronology attributes a permanent part of the attribute table
Originator: Peter D.A. Teensma, Publication_Date: 1987, Title: Fire History and Fire Regimes of the Central Western Cascades of Oregon , Geospatial_Data_Presentation_Form: map, Other_Citation_Details: PhD dissertation, University of Oregon, Eugene, OR
MS Excel spreadsheet "BRCHRONO" - DF15
DF02017: Study area boundary digitized from scanned published map in Teensma (1987).
DF02018: All fields in this shapefile and the data contained in them were created by Peter Weisberg for his 1998 publication (PhD dissertation), with the following exceptions: "Site_ID," "researcher" and "SOG". These 3 fields were added by Giglia, and are explained under "entity attribute."
Originator: Peter J. Weisberg, Publication_Date: 1998, Title: Fire History, Fire Regimes and Development of Forest Structure in the Central Western Oregon Cascades, Other_Citation_Details: PhD dissertation, Oregon State University, Corvallis, OR, Type_of_Source_Media: electronic mail system
DF02019: Weisberg study area polygon selected from "brsites" ArcInfo coverage (from Berkley 2000). Converted to shapefile.
DF02020: All fields in this shapefile and the data contained in them were created by Peter Weisberg for his 1998 publication (PhD dissertation), with the following exceptions: "Site_ID" and "SOG", explained in "entity attribute" section.
