About the Forest
About the Forest
10 meter digital elevation model (DEM) clipped to the Andrews Experimental Forest, 1998
PRINCIPAL INVESTIGATOR: Theresa J. Valentine
ORIGINATOR: George W. Lienkaemper
DATA SET CONTACT PERSON: Theresa J. Valentine
METADATA CONTACT: Theresa J. Valentine
METADATA CREATION DATE:
16 Jan 2004
MOST RECENT METADATA REVIEW DATE:
27 Feb 2014
topography, digital elevation model
DEMs (Digital Elevation Model data) are used to support a wide range of geographic information system (GIS) applications, including: surface hydrologic modeling, slope and aspect determination, viewshed analysis, fire modeling, contouring, transportation route planning, and profile generation. DEMs are also used to rectify aerial photography in the production of Digital Orthophoto Quads (DOQs). The hillshade is used for visualization of topographic and geological features.
Processing Procedures - GI003:
GI00301: Lat_10 was processed from the US Forest Service 10 meter DEM's. Gridlattice command was used to process the DEMS. The DEM's were created from scanning contour maps of unknown time frame. Grid was clipped to an area around the HJ Andrews Experimental Forest.
Processing Procedures - GI003 (1):
GI00302: The contour tool from the 3D Analyst Toolbox (raster surface) was used to create a 10 meter contour using the 10 meter DEM (lat_10)
Processing Procedures - GI003 (2):
GI00303: The contour tool from the 3D Analyst Toolbox (raster surface) was used to create a 25 meter contour using the 10 meter DEM (lat_10)
Processing Procedures - GI003 (3):
GI00304: The contour tool from the 3D Analyst Toolbox (raster surface) was used to create a 50 meter contour using the 10 meter DEM (lat_10)
Processing Procedures - GI003 (4):
GI00305: slope generated using the slope command (percentrise) on the 10 meter DEM (lat_10). hjaslp_10 = slope(lat_10, 1, percentrise)
Processing Procedures - GI003 (5):
GI00306: TThe Grid function ASPECT was used on the HJA 10 meter DEM optained from USGS.
Processing Procedures - GI003 (6):
GI00307: The ESRI GRID function HILLSHADE was applied to the HJ Andrews Experimental Forest 10 meter DEM (obtained from the USFS Geometronics Service Center). THe azmuth was set for 345 degrees and the altitude was set for 65 degrees.
A detailed description of USGS DEMs can be found at http://rockyweb.cr.usgs.gov/elevation/dpi_dem.html as well as a users guide at ftp://mapping.usgs.gov/pub/ti/DEM/demguide/dugdem.txt
There are 10 meter DEM files available for the Northwestern states, and for much of the United States. The data in this database have been clipped to an area surrounding the Andrews Experimental Forest.
Andrews Experimental Forest within the Willamette National Forest, western Cascades, Oregon, USA.
UPDATE FREQUENCY DESCRIPTION: