This data layer represents a mosiac of 10 meter digital elevation models for the extent of the Russian River watershed. Features from the original source data (see Originator information) were selected based on their spatial location within the Russian River watershed in Sonoma and Mendocino counties in California (the study area boundary of the Russian River Watershed Adaptive Management Plan project). This metadata file incorporates much of the information that was available in the metadata of the original source data. This information is indicated in quotation marks.
"ORIGINAL USGS METADATA ABSTRACT:
The 7.5-minute digital elevation model (DEM) data are digital representations of
cartographic information in a raster form. The DEMs consist of an array of elevations for ground positions at regularly spaced intervals. The
data are produced in 7.5- by 7.5-minute blocks from either digitized cartographic map contour overlays of a scanned National Aerial Photography Program (NAPP) photographs. The DEM data are stored as profiles with a 10- or 30-meter square grid spacing along and
between each profile. Approximate file sizes are 9.9 megabytes for a 10-meter resolution and 1.1 megabytes
for a 30-meter horizontal resolution. Data profiles for this product do not always have the same number of elevations because of the variable angle between true north and grid north in the Universal Transverse Mercator (UTM) projection coordinate system.
The DEM data for 7.5-minute units correspond to the USGS 7.5-minute topographic quadrangle map series for all of the United States and its territories except Alaska."
This data layer was edited from its original source data set for inclusion in the Russian River Watershed Adaptive Management Plan (RRWAMP) and RRWAMP Baseline Watershed Assessment project. The intended use of this data layer in this project is to examine landscape or human factors to promote ecological health and sustainability within the Russian River watershed.
"ORIGINAL USGS METADATA PURPOSE:
DEMs can be used as source data for digital orthophotos, and for earth science analysis as layers in geographic
information systems. DEMs can also serve as tools for volumetric analysis, for site location of towers, or for drainage basin delineation. These data were collected as part of the National Mapping Program. "
ground condition
The user assumes the entire risk related to the use of this data. The developers of this project shall not have any liability to any person or entity with respect to loss or damage caused or alleged to be caused directly or indirectly by information contained in this file. The developers of this project make no warranty, expressed or implied, nor does the fact of distribution of this data constitute such warranty. This data is not for navigational purposes or for use in litigation. In all cases, the user should refer to the original source data and metadata for accuracy, currentness and appropriate contact information.
3909 Halls Ferry Road
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Data were checked for spatial/geographic logic and consistency.
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This data layer was created for the Russian River Watershed Adaptive Management Plan (RRWAMP) and RRWAMP Baseline Watershed Assessment project through minor editing to the original source data. Slope position classification grid based on "russ10n83utm2" and slope using Topographic Position Index ArcView extension; and renamed to the current file name.
3909 Halls Ferry Road
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Metadata imported.
Internal feature number.
ESRI
download from http://www.russianriverwatershed.net/Content/10006/GISDataforDownload.html