 Database Description Plans for Data Distribution via the Internet
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Originator
The Sierra Nevada Ecosystem Project is listed as the originator on all coverages except
the tree seed zones. For the tree seed zones the source from the original map is
used. Publication Information
The date of publication of the SNEP data is 1996, and the publisher is Centers for
Water and Wildland Resources, University of California, Davis, California 95616. Contact Information
The University of California, Santa Barbara, Biogeography Laboratory is listed for
all of the contact information. Contact information is listed four times under the
headings Metadata Contact Information, Holdings, Distribution Information, and Processing
Steps. Maintenance and Update Frequency
Maintenance and update frequency are entered as unknown at this time. Map Projection Name and Direct Spatial Reference Method
All of the SNEP data are in Albers Conical Equal Area, and all of the data sets catalogued
are in vector format. Metadata Elements Not Utilized
There are several metadata elements that are not utilized. This was due to the type
of data catalogued and the information available. SNEP catalogued only data sets
in vector format so those metadata elements strictly for raster data were not needed.
Unutilized metadata elements include: row count, column count, indirect spatial reference
method, horizontal positional accuracy value, latitude resolution, longitude resolution,
geographic coordinate units, and supplemental information. Narrative Fields
Each data set catalogued has entries for the fields Attribute Accuracy Report, Abstract,
Entity, and Attribute Overview. However, the Alexandria metadata form allowed only
a very limited number of characters (255) per field, so entries are extremely concise. Reference is given to the data dictionary for more detailed information. Theme Keywords
Alexandria uses the Library of Congress subject headings. Theme keywords used for
the late successional/old-growth forest data set are late successional forests and
old-growth forests. For place keywords, Sierra Nevada, national forest, and the county
and state names are used. For the Significant Natural Areas data set, theme keywords used
include ecological significant areas, geological significant areas, and cultural
significant areas. Place keywords for Significant Natural Areas include Sierra Nevada,
national forest, and state names. Source Citation
All SNEP data sets catalogued are based on national forest visitor maps, U.S. Geological
Survey (USGS) 7.5 minute quadrangles, orthophotoquads, and USGS national park maps.
Source citation information was gathered from these hard-copy sources. For the tree seed zones coverage, source citation information from the hard-copy tree seed zones
map was used. Browse Graphic Files (BGF)
In a CERES/SNEP cooperative effort a combined AML and script was written to create
the browse graphic files (BGF). This program will create a BGF in graphics interchange
format (GIF), the size required by Alexandria for all coverages in a specified directory. SNEP created BGFs for all of the coverages catalogued. 
 
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