GI002
30 meter digital elevation model (DEM) clipped to the Andrews Experimental Forest, 1996

CREATOR(S): George W. Lienkaemper, Theresa J. Valentine

PRINCIPAL INVESTIGATOR(S): Theresa J. Valentine

ORIGINATOR(S): 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:

8 Jan 2014

KEYWORDS:

topography, digital elevation model

PURPOSE:

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)

METHODS:

Processing Procedures - GI002:

Description: GI00201: The original dems for the 6 quads that cover the HJA were mismatched by method (2 USGS quads were done by analytical stereo plotter and 4 GSC quads were developed using scanned contour) and were not edgematched. New edgematched quads were delivered by Region 6 in late 1994 - all using the GSC method. 960801 - previous versions of this dem were incorrectly shifted due to confusion over the datum. This unshifted dem is based on the 1927 North American Datum.

Processing Procedures - GI002 (1):

Description: GI00202: layer was derived from a 30-m DEM using the LATTICECONTOUR command in ArcGIS

Processing Procedures - GI002 (2):

Description: GI00203: Geometronics Service Center created the Digital Elevation Models, that were edgematched by Region 6 Geometronics, they were then merged and this layer was created using the ArcGIS command LATTICECONTOUR.

Citation: US Forest Service Geometronics Service Center and Region 6 Geometronics

Processing Procedures - GI002 (3):

Description: GI00204: Digital Elevation Model files from the US Forest Service Geometronics Service Center were edgematched by Region 6 Geometronics. They were merged and this layer was created using the ARC/INFO command LATTICECONTOR

Citation: US Forest Service Region 6 Geometronics

Processing Procedures - GI002 (4):

Description: GI00205: The ArcGIS Grid function SLOPE was used on the HJA 30 meter DEM optained from USFS Geometronics Service Center. hjaslp = slope (lat_27,percentrise)

Citation: USFS Geometronics Service Center

Processing Procedures - GI002 (5):

Description: GI00206: The ArcGIS Grid function ASPECT was used on the HJA 30 meter DEM optained from USFS Geometronics Service Center.

Citation: USFS Geometronics Service Center

Processing Procedures - GI002 (6):

Description: GI00207: The ESRI GRID function HILLSHADE was applied to the HJ Andrews Experimental Forest 30 meter DEM (obtained from the USFS Geometronics Service Center)

Citation: USFS Geometronics Service Center

SUPPLEMENTAL INFORMATION:

The original dems for the 6 quads that cover the HJA were mismatched by method (2 USGS quads were done by analytical stereo plotter and 4 GSC quads were developed using scanned contour) and were not edgematched. New edgematched quads were delivered by Region 6 in late 1994 - all using the GSC method. 960801 - previous versions of this dem were incorrectly shifted due to confusion over the datum. This unshifted dem is based on the 1927 North American Datum.

TAXONOMIC SYSTEM:

None

GEOGRAPHIC EXTENT:

Andrews Experimental Forest within the Willamette National Forest, western Cascades, Oregon, USA.

ELEVATION_MINIMUM (meters):

ELEVATION_MAXIMUM (meters):

PROGRESS DESCRIPTION:

Complete

UPDATE FREQUENCY DESCRIPTION:

notPlanned

CURRENTNESS REFERENCE:

Ground condition

RELATED MATERIAL:

Study databases GI003 (10 meter DEM) and GI010 (Lidar data with 1 meter DEM). The larger resolution DEM's may be more suitable for detail work.