Dataset Identification:
Resource Abstract:
- description: The LANDFIRE existing vegetation layers describe the following elements of existing vegetation for each LANDFIRE
mapping zone: existing vegetation type, existing vegetation canopy cover, and existing vegetation height. Vegetation is mapped
using predictive landscape models based on extensive field reference data, satellite imagery, biophysical gradient layers,
and classification and regression trees.<div><br /></div> <div>DATA SUMMARY:&nbsp;</div>
<div>The existing vegetation cover (EVC) data layer is an important input to LANDFIRE modeling efforts. EVC is generated
separately for tree, shrub and herbaceous cover life forms using training data and a series of geospatial data layers. Percentage
tree canopy cover training data are generated using digital orthophotographs and/or high spatial resolution satellite data
for multiple sites. Percentage shrub and herbaceous canopy cover training data are generated using plot-level ground-based
visual assessments. Once the training data are developed, relationships are then established separately for each life form
between the training data and the combination of multitemporal Landsat data, digital elevation data and biophysical gradient
data layers using regression tree analysis (Cubist). Correlation (R) values are generated through cross-validation using the
regression tree software, and provide a means for assessing accuracy. The derived regression tree equations are then applied
to the geospatial data to create 30m resolution life form specific data layers (i.e., separate data layers are generated for
tree, shrub and herbaceous vegetation cover).After running Cubist, each of the derived data layers (tree, shrub, herbaceous)
has a potential range from 0-100 percent. Tree, shrub and herbaceous values are then binned into discrete classes (up to 10
bins at 10 percent intervals for tree, shrub and herbaceous canopy cover data layers). The final EVC layer is then evaluated
and rectified through a series of QA/QC measures to ensure that the life-form of the cover code matched the life-form of the
existing vegetation type.EVC is used in many subsequent LANDFIRE data layers. Refer to spatial metadata for date ranges of
field plot data and satellite imagery for each LANDFIRE map zone.</div>; abstract: The LANDFIRE existing vegetation
layers describe the following elements of existing vegetation for each LANDFIRE mapping zone: existing vegetation type, existing
vegetation canopy cover, and existing vegetation height. Vegetation is mapped using predictive landscape models based on extensive
field reference data, satellite imagery, biophysical gradient layers, and classification and regression trees.<div><br
/></div> <div>DATA SUMMARY:&nbsp;</div> <div>The existing vegetation cover (EVC) data layer
is an important input to LANDFIRE modeling efforts. EVC is generated separately for tree, shrub and herbaceous cover life
forms using training data and a series of geospatial data layers. Percentage tree canopy cover training data are generated
using digital orthophotographs and/or high spatial resolution satellite data for multiple sites. Percentage shrub and herbaceous
canopy cover training data are generated using plot-level ground-based visual assessments. Once the training data are developed,
relationships are then established separately for each life form between the training data and the combination of multitemporal
Landsat data, digital elevation data and biophysical gradient data layers using regression tree analysis (Cubist). Correlation
(R) values are generated through cross-validation using the regression tree software, and provide a means for assessing accuracy.
The derived regression tree equations are then applied to the geospatial data to create 30m resolution life form specific
data layers (i.e., separate data layers are generated for tree, shrub and herbaceous vegetation cover).After running Cubist,
each of the derived data layers (tree, shrub, herbaceous) has a potential range from 0-100 percent. Tree, shrub and herbaceous
values are then binned into discrete classes (up to 10 bins at 10 percent intervals for tree, shrub and herbaceous canopy
cover data layers). The final EVC layer is then evaluated and rectified through a series of QA/QC measures to ensure that
the life-form of the cover code matched the life-form of the existing vegetation type.EVC is used in many subsequent LANDFIRE
data layers. Refer to spatial metadata for date ranges of field plot data and satellite imagery for each LANDFIRE map zone.</div>
Citation
- Title BLM REA COP 2010 LANDFIRE - Existing Vegetation Cover for the Colorado Plateau ecoregion, USA (version 1.0).
-
- creation Date
2017-12-12T09:01:07.557001
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Metadata data stamp:
2018-08-07T00:21:12Z
Resource Maintenance Information
- maintenance or update frequency:
- notes: This metadata record was generated by an xslt transformation from a dc metadata record; Transform by Stephen M. Richard, based
on a transform by Damian Ulbricht. Run on 2018-08-07T00:21:12Z
Metadata contact
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pointOfContact
- organisation Name
CINERGI Metadata catalog
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- Contact information
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- Address
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- electronic Mail Address cinergi@sdsc.edu
Metadata language
eng
Metadata character set encoding:
utf8
Metadata standard for this record:
ISO 19139 Geographic Information - Metadata - Implementation Specification
standard version:
2007
Metadata record identifier:
urn:dciso:metadataabout:98ef49ed-0e2b-4f31-b127-b578a00b822a
Metadata record format is ISO19139 XML (MD_Metadata)