Vegetation - Central Mojave Desert [ds166]

SDE Feature Class

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Download this dataset

Tags
Mojave Desert, National Vegetation Classification, arid lands, California, vegetation


Summary

These data were developed as part of the Department of Defense Legacy funded Mojave Desert Ecosystem Program.

Description

The Department of Defense and the other desert managers are developing and organizing scientific information needed to better manage the natural resources of the Mojave Desert. One product from this endeavor is the Central Mojave Vegetation Map (developed by US Dept of Interior, USGS Western Ecological Research Center and Southwest Biological Science Center) that displays vegetation and other land cover types in the eastern Mojave of California. Map labels represent alliances and groups of alliances as described by the U.S. National Vegetation Classification. The nominal minimum mapping unit is 5 hectares. Each map unit is labeled by a primary land cover type and a secondary type where applicable. In addition, the source of data for labeling each map unit is also identified in the attribute table for each map unit. Data were developed using field visits, 1:32,000 aerial photography, SPOT satellite imagery, and predictive modeling.

Credits

Mojave Desert Ecosystem Program, Coordinator: Clarence Everly

Use limitations

While the polygons boundaries have been preserved in the final vegetation map so that the source and secondary label items can be maintained for each polygon, an ArcInfo 'dissolve' could be used to eliminate polygon boundaries between adjacent identical primary map labels. Alternately, the map may be viewed in ArcView with polygon boundaries eliminated for a presentation of contiguous vegetation types without the polygon boundaries.

Extent

West -118.000923 East -114.875803
North 37.249948 South 34.125001

Scale Range
Maximum (zoomed in) 1:24,000
Minimum (zoomed out) 1:32,000

ArcGIS Metadata

Topics and Keywords

* Content type Downloadable Data


Place keywords Mojave Desert, California

Theme keywords National Vegetation Classification, arid lands, vegetation

Citation

* Title DS0166_20051011
Publication date 2002-01-01


Presentation formats digital map
FGDC geospatial presentation format vector digital data


Citation Contacts

Responsible party
Organization's name Kathryn Thomas
Contact's role originator


Resource Details

Dataset languages English(UNITED STATES)


Status completed
Spatial representation type * vector


Supplemental information
Decision tree models used in the development of this data set are described in detail in the Central Mojave Vegetation Mapping Project: Final Report. To view the final report go to: http://www.nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=13890 .
* Processing environment Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.1.1.3143


Credits
Mojave Desert Ecosystem Program, Coordinator: Clarence Everly
ArcGIS item properties
* Name DS0166_20051011
* Location Server=; :; Database=; User=; Version=
* Access protocol ArcSDE Connection

Extents

Extent
Description
Observed
Temporal extent
Beginning date 1994-01-01
Ending date 2000-01-01

Extent
Geographic extent
Bounding rectangle
Extent type Extent used for searching
* West longitude -118.000923
* East longitude -114.875803
* North latitude 37.249948
* South latitude 34.125001
* Extent contains the resource Yes

Extent in the item's coordinate system
* West longitude -13135802.660000
* East longitude -12787915.861800
* South latitude 4045599.014300
* North latitude 4474003.870400
* Extent contains the resource Yes

Resource Points of Contact

Point of contact
Individual's name Thomas, Kathryn
Organization's name USGS Forest and Rangeland Ecosystem Science Center
Contact's role point of contact


Contact information
Phone
Voice 928-556-7466 ext 235

Address
Type both
Delivery point Colorado Plateau Field Station Northern Arizona University PO Box 5614, Bldg 24
City Flagstaff
Administrative area Arizona
Postal code 86011-5614
e-mail address Kathryn_A_Thomas@usgs.gov



Resource Maintenance

Resource maintenance
Update frequency as needed


Resource Constraints

Legal constraints
Limitations of use
Although these data have been processed successfully on a computer system at the USGS-FRESC-Colorado Plateau Field Station, no warranty expressed or implied is made regarding the accuracy or utility of these data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of these data and aggregate use with other data. It is strongly recommended that these data are directly acquired from a U.S. Geological Survey server, and not indirectly through other sources which may have changed these data in some way. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The U.S. Geological Survey and USGS-FRESC-Colorado Plateau Field Station shall not be held liable for improper or incorrect use of these data described and/or contained herein.
Constraints
Limitations of use
While the polygons boundaries have been preserved in the final vegetation map so that the source and secondary label items can be maintained for each polygon, an ArcInfo 'dissolve' could be used to eliminate polygon boundaries between adjacent identical primary map labels. Alternately, the map may be viewed in ArcView with polygon boundaries eliminated for a presentation of contiguous vegetation types without the polygon boundaries.

Spatial Reference

ArcGIS coordinate system
* Type Projected
* Geographic coordinate reference GCS_WGS_1984
* Projection WGS_1984_Web_Mercator_Auxiliary_Sphere
* Coordinate reference details
Projected coordinate system
Well-known identifier 102100
X origin -20037700
Y origin -30241100
XY scale 10000
Z origin 0
Z scale 1
M origin 0
M scale 1
XY tolerance 0.001
Z tolerance 2
M tolerance 2
High precision true
Latest well-known identifier 3857
Well-known text PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator_Auxiliary_Sphere"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],PARAMETER["Auxiliary_Sphere_Type",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3857]]

Reference system identifier
* Value 3857
* Codespace EPSG
* Version 7.11.2


Spatial Data Properties

Vector
* Level of topology for this dataset geometry only


Geometric objects
Feature class name DS0166_20051011
* Object type composite
* Object count 15579



ArcGIS Feature Class Properties
Feature class name DS0166_20051011
* Feature type Simple
* Geometry type Polygon
* Has topology FALSE
* Feature count 15579
* Spatial index TRUE
* Linear referencing FALSE



Data Quality

Scope of quality information
Resource level dataset




Data quality report - Conceptual consistency
Measure description
This data set is an ArcInfo polygon coverage that has been successfully processed using the ArcInfo build command. All polygons are closed and have a single label point.




Data quality report - Completeness omission
Measure description
We assumed, based on literature review and personal observation, that floristic variation (at the alliance level) in the Mojave ecoregion is not strongly related to multispectral reflectance as recorded in satellite imagery because vegetation cover is sparse and the substrate dominates the reflectance response. Color air photos were acquired during several missions, and using two different aircraft camera platforms, due to problems with cloud cover. Photos varied in quality, as a function of format and mission.




Data quality report - Quantitative attribute accuracy
Measure description
Please refer to process steps and the Central Mojave Vegetation Map Final Report.




Data quality report - Absolute external positional accuracy
Dimension horizontal


Measure description
SPOT panchromatic satellite imagery with 10 m resolution was obtained from the California Department Fish Game (copyright CNES/SPOT Image Corp. 1994) for the mapping area. This imagery had been georeferenced and terrain corrected and was used as the base mapping layer for the project. This imagery conforms to the 1:24,000 national map accuracy standard.




Lineage

Process step
Description
SPOT imagery was received in Albers projection and reprojected to UTM projection WGS84 datum.


Source data
Relationship to the process step used


Source citation
Alternate titles spot








Process step
Description
Second iteration predicted vegetation map - The reference dataset was updated with the additional observation points so that 3819 point observations of vegetation types and their georeferenced location (UTM northing and easting) was available for the second modeling effort. Twelve environmental variables were selected from all the variables examined for predictive modeling. These variables were obtained in digital format (with integer values and 30 m. resolution) to cover the study area. The value for each environmental variable at each of the field point observations was extracted (ArcInfo 'sample'). This resulted in a database containing the observed vegetation type, UTM coordinates at that site, the observed vegetation type, and the value for each of 12 environmental variables at that site. Decision tree models were developed predicting presence/absence each of the 20 alliances and were pruned and snipped. The resulting decision trees ranged in size from 12 to 41 terminal nodes. A C++ program was used to convert the decision tree rules into an AML (Arc Macro Language) script for use in ArcInfo. The AML that was generated consists of a series of "if-then" statements based on the threshold values of environmental variables, and the terminal node associated with those environmental criteria. Each AML was interactively edited so that the terminal node number was replaced with the proportion of observations in which the predicted alliance/alliance complex was present at that node. When combined with grids of the environmental data, the AML generates an output grid where each grid cell meets the environmental criteria of one of the decision tree terminal nodes and has an associated probability of presence based on the observed data used to construct the model. The AML's were used to generate 20 probability maps, one for each vegetation type modeled. The predicted probabilities for each vegetation type ranged from 0-100 initially and were reclassified (ArcInfo Grid 'reclass') to 5 categories: 1 = <10% probability, 2= 11-49%, 3=50-64%, 4=65-84%, and 5=85-100% probability. The 20 probability grids were combined into combined probability grids (ArcInfo Grid 'combine') that contained the 1-5 probability category for each alliance/alliance complex in each grid cell. The database tables for the combined probability grids were extracted in an Access database for further processing.


Source data
Relationship to the process step used


Source citation
Alternate titles model








Process step
Description
Final labeling of probability maps - Using these tables, one alliance or alliance complex was assigned to each grid cell by inspecting the probability categories for all 20 alliances/alliance complexes for each cell and selecting the best possible prediction(s) for that grid cell. This recoding was done by visually inspecting the probabilities in each cell using a set of recoding rules. The recoding scheme was chosen to select for any grid cell the alliance/alliance complex with the highest prediction probability for that location. If a single vegetation type was predicted with a probability category of 5 or 4 (greater than 65%), then the recoded assignment became that vegetation type. If more than one vegetation type had a probability category of 4 or 5 then the grid cell was assigned a combination of all the types with probability 4 or 5. If the highest predicted probability was 3, 2 or 1; the grid cell was assigned the vegetation type with the highest probability. The final probability maps were used as one of the data sources for final labeling of the map polygons.


Source data
Relationship to the process step used


Source citation
Alternate titles model








Process step
Description
Photo Interpretation - We developed a classification of photo-interpreted preliminary labels with three attributes: vegetation type, landform, and vegetation cover. These preliminary labels served two purposes: a) they indicated what criteria were used by the photo-interpreter to delineate the polygon, and b) they were used to stratify the mapped area so that test models could be applied separately to non-overlapping areas of the landscape containing subsets of the vegetation types. We included a photo-interpreted landform label because although there was a landform map available, it was developed at a coarser scale (10 ha MMU). Rolls of photo transparencies were cut into frames, and placed in protective polypropylene sleeves. Polygons were drawn onto the sleeve and then visually transferred and digitized on-screen using the georectified SPOT image as a base map. Interpreters first delineated landform boundaries, and then added any additional boundaries related to vegetation physiognomy (large shrubs, trees) and cover (as indicated by tone and texture). We initially mapped a landform class that we called "Wash Systems" - a high density of small washes with the intervening areas of upland included in the polygons. During editing, we have tried to separate washes and upland while maintaining the specified MMU.


Source data
Relationship to the process step used


Source citation
Alternate titles Air Photos








Process step
When the process occurred 1999-01-01
Description
First iteration predicted vegetation map - A reference dataset of 2008 point observations derived from the releve data and analysis of existing data was used to create an initial map of predicted alliance and alliance complex distributions. This map was field validated in the fall of 1999 using check maps of vegetation polygons overlain on satellite imagery. Based on the field validation and a review panel of Mojave vegetation experts, additional updating and editing of the map was planned based on collection of additional field observation points and reworking of the decision tree models. In the spring of 2000 over 3500 additional observations points were collected.


Source data
Relationship to the process step used


Source citation
Alternate titles model








Process step
When the process occurred 2000-01-01
Description
Final Map Label Assignment - The map polygons draw during the photo-interpretation step were used in the final vegetation map. They were labeled by assigning a map label using the best available information for each polygon. Map labels were assigned in the following order of priority: 1. Field observed map label assignments, where the field observation was for an area at least the size of the minimum map unit (5 hectares). These field observations were from San Diego State University observations to support photointerpretation, photos of the relev plots acquired as part of the project (1997, 1998 and 1999), and the reference dataset. 2. Expert assigned map label where a) the expert was known to be an area authority, b) the alliance type is known to be spatially constrained, and/or c) the assignment was based on the expert's use of ancillary data sources. 3. Photointerpreted labels for Pinyon, all land use categories (Development, Mining, Agriculture and Urban), Mesquite, and Limber Pine/Bristlecone Pine. 4. Wash System groupings based on identification of wash characteristic alliances that occur within particular elevation zones. This was based on elevation modeling of the field collected relev data and on the descriptions of wash characteristic alliances presented in Appendix B of final report. 5. Landform based habitat labels based on the presence of a GLSCGIS delineated landform polygon (Dunes, Lava Beds and Cinder Cones, Playa). 6. Predictive model (probability maps) derived map label assignment. The map label indicates the predicted type, and the source label indicates the percentage of the polygon, which was predicted to be that vegetation type.


Source data
Relationship to the process step used


Source citation
Alternate titles model






Source data
Relationship to the process step used


Source citation
Alternate titles Air Photos






Source data
Relationship to the process step used


Source citation
Alternate titles glscgis






Source data
Relationship to the process step used


Source citation
Alternate titles releve' plots








Source data
Description
The aerial photography was used to delineate map polygons based on vegetation and land-surface characteristics. Following field reconnaissance, we determined that polygons could be delineated based on tone, texture, and terrain features related to landform, soil or surface color, and sometimes plant size, tone or density.


Resolution of the source data
Scale denominator 32000

Source citation
Title Mojave Color Air Photography
Alternate titles Air Photos
Publication date 1997-01-01


FGDC geospatial presentation format aerial photography


Responsible party
Organization's name NASA High Altitude Airborne Sciences Program
Contact's role originator




Extent of the source data
Description
Observed
Temporal extent
Beginning date 1997-04-14
Indeterminate time unknown
Ending date 1997-07-24
Indeterminate time unknown



Source data
Description
Decision tree models (also know as classification or regression trees) were developed to predict the probability of occurrence of each alliance or group of alliances (alliance complex). Maps of predicted alliance/alliance complex occurrence were developed using the decision tree models and maps of environmental features.


Resolution of the source data
Scale denominator 24000

Source citation
Title Decision Tree Model and maps of predicted occurrence of vegetation types
Alternate titles model
Publication date
Indeterminate date inapplicable


Presentation formats digital map
FGDC geospatial presentation format vector digital data


Other citation details
Details of this model are presented in the Mojave Desert Ecosystem Program Central Mojave Vegetation Mapping Project.


Responsible party
Organization's name Thomas, Kathryn
Contact's role originator




Extent of the source data
Description
publication date
Temporal extent
Date and time
Indeterminate date unknown
Indeterminate time unknown



Source data
Description
Landforms, which were used to help delineate vegetation type boundaries.


Resolution of the source data
Scale denominator 24000

Source citation
Title Geomorphic Landform and Surface Composition Geographic Information System
Alternate titles glscgis
Publication date 2001-01-01


Presentation formats digital map
FGDC geospatial presentation format vector digital data


Responsible party
Organization's name Mojave Desert Ecosystem Program
Contact's role originator


Resource location online
Location http://www.mojavedata.gov/ mdep/geomorphic/glabout.html



Extent of the source data
Description
Observed
Temporal extent
Beginning date 1997-08-01
Indeterminate time unknown
Ending date
Indeterminate date now
Indeterminate time unknown



Source data
Description
SPOT panchromatic satellite imagery with 10 m resolution was obtained from the California Department Fish and Game (copyright CNES/SPOT Image Corp. 1994) for the mapping area. This imagery had been georeferenced and terrain corrected and was used as the base map layer for the project.


Source citation
Title Mojave SPOT Imagery
Alternate titles spot
Publication date 1994-01-01


FGDC geospatial presentation format satellite imagery


Responsible party
Organization's name California Department Fish and Game
Contact's role originator




Extent of the source data
Description
Observed
Temporal extent
Date and time 1994-01-01
Indeterminate time unknown



Source data
Description
Data from these plots were used to create a reference data set which was used to develop the decision tree model and validate map label assignments derived from photo interpretation.


Source citation
Title Central Mojave Releve' Field Data
Alternate titles releve' plots
Publication date 2002-01-01


FGDC geospatial presentation format field data


Responsible party
Organization's name Thomas, Kathryn
Contact's role originator




Extent of the source data
Description
ground condition
Temporal extent
Beginning date 1997-01-01
Indeterminate time unknown
Ending date 2000-01-01
Indeterminate time unknown



Geoprocessing history

Process
Process name Project_18
Date 2005-09-2714:39:11
Tool location C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Data Management Tools.tbx\Project
Command issued
Include in lineage when exporting metadata No


Process
Date 2011-07-2108:38:33
Tool location C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Conversion Tools.tbx\FeatureClassToFeatureClass
Command issued
Include in lineage when exporting metadata No


Process
Date 2013-06-2114:24:22
Tool location c:\program files (x86)\arcgis\desktop10.1\ArcToolbox\Toolboxes\Data Management Tools.tbx\Project
Command issued
Include in lineage when exporting metadata No


Distribution

Distributor
Available format
Name ARCE
Specification ArcInfo interchange file format
File decompression technique ArcInfo EXPORT compression applied to this coverage. Use ArcInfo IMPORT command to convert the interchange file.
Format information content The interchange file contains all coverage information and appropriate INFO file information in a fixed-length, ASCII format.


Ordering process

Transfer options
Medium of distribution
Medium name CD-ROM




Distribution format
* Name SDE Feature Class


Transfer options
Online source
Location http://bios.dfg.ca.gov/

Online source
Location ftp://ftp.dfg.ca.gov/BDB/GIS/BIOS/Public_Datasets/100_199/ds166.zip

Fields

Details for object DS0166_20051011
* Type Feature Class
* Row count 15579
Definition
ArcInfo Polygon Attribute Table
Definition source
ESRI


Field OBJECTID
* Width 4
* Output width 5
* Data type OID
* Alias OBJECTID
* Precision 10
* Scale 0
Field description
Object feature identifier
Description source
ArcInfo documentation
Range of values
Minimum value 2
Maximum value 15580
Units of measure None

* Description of values
Sequential unique whole numbers that are automatically generated.




Field AREA_
* Alias AREA_
* Data type Double
* Width 8
* Precision 26
* Scale 11
Field description
Area of polygon in square meters.


Field PERIMETER
* Alias PERIMETER
* Data type Double
* Width 8
* Precision 24
* Scale 11
Field description
Perimeter of the polygon in meters.
Range of values
Minimum value 658.8316
Maximum value 1053083
Units of measure meters



Field LABEL_1
* Width 33
* Output width 254
* Data type String
* Alias LABEL_1
* Precision 0
* Scale 0
Field description
The finest level of mapping representing a single alliance or groupings of similar alliances (alliance complex) or a land use type. See Table 2 in Final Report for complete explanation.
List of values
Value Agricultural
Description Agriculture generally irrigated


Value Alkali Meadow/Sink
Description Distichlis spicata Intermittently Flooded Herbaceous Alliance


Value Big Sagebrush
Description Artemisia tridentata Shrubland Alliance, Ephedra viridis-Artemisia tridentata Shrubland Alliance


Value Blackbrush
Description Coleogyne ramosisssima Shrubland Alliance


Value Creosote
Description Larrea tridentata Shrubland Alliance Larrea tridentata-Ambrosia dumosa Shrubland Alliance, Larrea tridentata-Encelia farinosa Shrubland Alliance (occasionaly), Ambrosia dumosa Dwarf-Shrubland Alliance, Encelia farinosa Shrubland Alliance (occasionally)


Value Creosote-Brittlebush
Description Larrea tridentata-Encelia farinosa Shrubland Alliance, Encelia farinosa Shrubland Alliance


Value Desert Holly
Description Artiplex hymenelytra Shrubland Alliance


Value Dunes
Description Barren; Herbaceous Dunes Sparse Vegetation Alliance; Panicum urvilleanum Sparsely Vegetated Herbaceous Alliance; Achnatherum speciosum Herbaceous Alliance: Pleuraphis rigida Herbaceous Alliance; Ambrosia dumosa Dwarf-Shrubland Alliance; Artiplex canescens, A. polycarpa or A. confertifolia Shrubland Alliance; Larrea tridentata Shrubland Alliance; Larrea tridentata-Ambrosia dumosa Shrubland Alliance; Prosopis glandulosa Shrubland Alliance; Abronia villosa Sparsely Vegetated Alliance


Value Galleta
Description Pleuraphis jamesii or Pleuraphis rigida Herbaceous Alliance


Value High Elevation Wash System
Description Sparsely Vegetated Wash, Unvegetated, Prunus fasciculatum Shrubland Alliance, Salazaria mexicana Shrubland Alliance, Hymenoclea salsola Shrubland Alliance, Salvia dorrii Dwarf-Shrubland Alliance, Viguiera reticulata Intermittently Flooded Shrubland Alliance (occasionally), Baccharis sergiloides Intermittently Flooded Shrubland Alliance, occasionally more typically upland types such as Artemisia tridentata Shrubland ALliance


Value Hopsage
Description Grayia spinosa Shrubland Alliance


Value Iodine Bush-Bush Seepweed
Description Allenrolfea occidentalis Shrubland Alliance, Suaeda moquinii Intermittently Flooded Shrubland Alliance


Value Joshua Tree
Description Yucca brevifolia Wooded Shrubland Alliance


Value Juniper
Description Juniperus californica or Juniperus osteosperma Wooded Shrubland Alliance


Value Lava Beds and Cinder Cones
Description Barren, Artiplex hymenelytra Shrubland Alliance, Encelia farinosa Shrubland Alliance, Larrea tridentata-Encelia farinosa Shrubland Alliance


Value Limber Pine/Bristlecone Pine
Description Pinus flexilis Woodland Alliance, Pinus longaeva Woodland Alliance


Value Low Elevation Wash System
Description Barren, Psorothamnus spinosus Intermittently Flooded Shrubland Alliance, Hymenoclea salsola Shrubland Alliance, Ephedra californica Intermittently Flooded Shrubland Alliance, Acacia greggii Shrubland Alliance, Chilopsis linearis Intermittently Flooded Shrubland Alliance, Encelia virginensis Shrubland Alliance, Ericameria nauseosa Shrubland Alliance, Eriogonum fasciculatum Shrubland Alliance, Hyptis emoryi Intermittently Flooded Shrubland Alliance, Lepidospartum squamatum Intermittently Flooded Shrubland Alliance, Prospois glandulosa Shrubland Alliance, Tamarix spp. Teporarily Flooded Shrubland Alliance, Viguiera parishii Shrubland Alliance and occasionally more typically upland types such as Artiplex hymenelytra Shrubland Alliance, Artiplex canescens/confertifolia/or polycarpa Shrubland Alliances


Value Menodora
Description Menodora spinescens Dwarf-Shrubland Alliance


Value Mesquite
Description Prosopis glandulosa Shrubland Alliance


Value Mid Elevation Wash System
Description Barren, Acacia greggii Shrubland Alliance, Prosopis glandulosa Shrubland Alliance, Chilopsis linearis Intermittently Flooded Shrubland Alliance, Ericameria paniculata Intermittently Flooded Shrubland Alliance, Viguiera parishii Shrubland Alliance, Baccharis sergiloides Intermittently Flooded Shrubland Alliance, Viguiera reticulata Intermittently Flooded Shrubland Alliance, Ephedra californica Intermittently Flooded Shrubland Alliance, Hymenoclea salsola Shrubland Alliance, Salazaria mexicana Shrubland Alliance, Encelia virginensis Shrubland Alliance, Ericameria nauseosa Shrubland Alliance, Eriogonum fasciculatum Shrubland Alliance, Lepidospartum squamatum Intermittently Flooded Shrubland Alliance, occasionally more typically upland types such as Artiplex hymenelytra Shrubland Alliance; Artiplex canescens, A. confertifolia or A. polycarpa Shrubland Alliances


Value Mining
Description Land use type


Value Mojave Yucca
Description Yucca schidigera Shrubland Alliance


Value Nevada Joint-Fir
Description Ephedra nevadensis Shrubland Alliance


Value Pinyon
Description Pinus monophylla Wooded Shrubland Alliance, Pinus monophylla-(Juniperus osteosperma) Woodland Alliance


Value Playa
Description Barren around edges may find Artiplex polycarpa, Artiplex confertifolia, or Artiplex canescens Shrubland Alliances; Allenrolfea occidentalis Shrubland Alliance, Suaeda moquinii Intermittently Flooded Shrubland Alliance, Pluchea sericea Seasonally Flooded Shrubland Alliance, Prosopis glandulosa Shrubland Alliance, Sporobolus airoides Intermittently Flooded Herbaceous Alliance


Value Rural Development
Description Buildings, structures or surface development other than urban


Value Saltbush
Description Artiplex canescens Shrubland Alliance, Artiplex polycarpa Shrubland Alliance, Artiplex confertifolia Shrubland Alliance (when around playas)


Value Shadscale
Description Artiplex confertifolia Shrubland Alliance


Value Sparse Vegetation
Description Less than 2% perennial vegetation


Value Urban
Description Land use type


Value White Burrobush
Description Ambrosia dumosa Dwarf-Shrubland Alliance




Field LABEL_2
* Width 32
* Output width 254
* Data type String
* Alias LABEL_2
* Precision 0
* Scale 0
Field description
The secondary label for any alliance or alliance complex that may have been assigned to the map unit. See Table 2 in Final Report for complete explanation.
List of values
Value Big Sagebrush
Description Artemisia tridentata Shrubland Alliance, Ephedra viridis-Artemisia tridentata Shrubland Alliance


Value Blackbrush
Description Coleogyne ramosisssima Shrubland Alliance


Value Creosote
Description Larrea tridentata Shrubland Alliance Larrea tridentata-Ambrosia dumosa Shrubland Alliance, Larrea tridentata-Encelia farinosa Shrubland Alliance (occasionaly), Ambrosia dumosa Dwarf-Shrubland Alliance, Encelia farinosa Shrubland Alliance (occasionally)


Value Creosote-Brittlebush
Description Larrea tridentata-Encelia farinosa Shrubland Alliance, Encelia farinosa Shrubland Alliance


Value Desert Holly
Description Artiplex hymenelytra Shrubland Alliance


Value Disturbed
Description


Value Galleta
Description Pleuraphis jamesii or Pleuraphis rigida Herbaceous Alliance


Value Hopsage
Description Grayia spinosa Shrubland Alliance


Value Iodine Bush-Bush Seepweed
Description Allenrolfea occidentalis Shrubland Alliance, Suaeda moquinii Intermittently Flooded Shrubland Alliance


Value Joshua Tree
Description Yucca brevifolia Wooded Shrubland Alliance


Value Juniper
Description Juniperus californica or Juniperus osteosperma Wooded Shrubland Alliance


Value Menodora
Description Menodora spinescens Dwarf-Shrubland Alliance


Value Mesquite
Description Prosopis glandulosa Shrubland Alliance


Value Mining
Description Land use type




Field SYSTEM
* Width 42
* Output width 50
* Data type String
* Alias SYSTEM
* Precision 0
* Scale 0
Field description
The coarser level of vegetation mapping representing groupings of alliances. See Table 2 in Final Report for complete explanation.
List of values
Value Barren
Description Sparse Vegetation


Value Creosote Bush Mixed Scrub
Description White Burrobush, Creosote, Creosote-Brittlebush


Value Desert Grassland and Shrub Steppe
Description Galleta


Value Desert Sink
Description Iodine Bush-Bush Seepweed, Alkali Meadow/Sink, Playa


Value Desert Wash System
Description High Elevation Wash System, Mid Elevation Wash System, Low Elevation Wash System


Value Interior Dunes
Description Dunes


Value Land Use
Description Agriculture, Rural Development, Mining, Urban


Value Lava Beds
Description Lava Beds and Cinder Cones


Value Limber Pine/Bristlecone Pine Woodland
Description Limber Pine/Bristlecone Pine


Value Mesquite Bosque
Description Mesquite


Value Mid Elevation Mixed Desert Scrub
Description Blackbrush, Nevada Joint-Fir, Hopsage, Menodora, Joshua Tree, Mojave Yucca


Value Pinyon Juniper Woodland
Description Big Sagebrush, Juniper, Pinyon


Value Saltbush Scrub
Description Saltbush, Shadscale, Desert Holly




Field SOURCE_1
* Width 18
* Output width 16
* Data type String
* Alias SOURCE_1
* Precision 0
* Scale 0
Field description
The code for the source of information used to assign the primary vegetation type (i.e., LABEL_1).
List of values
Value EXPERT1
Description Expert review workshop


Value EXPERT2
Description MDEP mapping team editors


Value FIELD1
Description San Diego State University photointerpretation team field observations


Value FIELD2
Description Relev data, retrospective data, validation and editing observations


Value LSU
Description Landforms from GLGSGIS


Value MOD1
Description First iteration predictive modeling


Value MOD2-100
Description Predictive modeling, all of polygon predicted to be primary label


Value MOD2-25
Description Predictive modeling, 25-34% of polygon is predicted to be primary label


Value MOD2-35
Description Predictive modeling, 35-44% of the polygon is predicted to be primary label


Value MOD2-45
Description Predictive modeling, 45-54% of polygon is predicted to be primary label


Value MOD2-55
Description Predictive modeling, 55-64% of polygon is predicted to be primary label


Value MOD2-65
Description Predictive modeling, 65-74% of polygon is predicted to be primary label


Value MOD2-75
Description Predictive modeling, 75-84% of polygon is predicted to be primary type


Value MOD2-85
Description Predictive modeling, 85-99% of polygon is predicted to be primary type


Value Photo-CPSU
Description Photointerpretation conducted at Colorado Plateau Field Station


Value Photo-SDSU
Description Photointerpretation conducted at San Diego State University




Field SOURCE_2
* Width 19
* Output width 16
* Data type String
* Alias SOURCE_2
* Precision 0
* Scale 0
Field description
The code for the source of information used to assign the additional vegetation type (i.e., LABEL_2), if present.
List of values
Value EXPERT2
Description MDEP mapping team editors


Value FIELD1
Description San Diego State University photointerpretation team field observations


Value FIELD2
Description Relev data, retrospective data, validation and editing observations


Value MOD1
Description First iteration predictive modeling


Value MOD2
Description Second iteration predictive modeling


Value Photo-SDSU
Description Photointerpretation conducted at San Diego State University




Field MOJVEG_NUM
* Alias MOJVEG_NUM
* Data type Double
* Width 8
* Precision 19
* Scale 0
Field description
Unique identification number assigned to record by data developer.


Field MOJVEG_ID
* Alias MOJVEG_ID
* Data type Double
* Width 8
* Precision 16
* Scale 0
Field description
Unique identification number assigned to record by data developer.


Field LAND_COVER
* Width 41
* Output width 250
* Data type String
* Alias LAND_COVER
* Precision 0
* Scale 0
Field description
Primary vegetation
Description of values
Refer to label attributes.




Field SHAPE
* Alias Shape
* Data type Geometry
* Width 4
* Precision 0
* Scale 0
* Field description
Feature geometry.
* Description source
ESRI
* Description of values
Coordinates defining the features.




Field Shape.STArea()
* Alias Shape.STArea()
* Data type Double
* Width 0
* Precision 0
* Scale 0




Field Shape.STLength()
* Alias Shape.STLength()
* Data type Double
* Width 0
* Precision 0
* Scale 0






References

Aggregate Information
Association type cross reference


Aggregate resource name
Title Central Mojave Field Data
Publication date 2002-01-01


FGDC geospatial presentation format Database


Responsible party
Organization's name Kathryn Thomas
Contact's role originator




Metadata Details

Metadata language English(UNITED STATES)
Metadata character set utf8 - 8 bit UCS Transfer Format


Scope of the data described by the metadata dataset
Scope name * dataset


* Last update 2014-04-28


ArcGIS metadata properties
Metadata format ArcGIS1.0
Metadata style FGDC CSDGM Metadata


Created in ArcGIS for the item 2014-03-0615:33:48
Last modified in ArcGIS for the item 2014-04-2809:26:15


Automatic updates
Have been performed Yes
Last update 2014-04-2809:26:15


Metadata Contacts

Metadata contact
Individual's name Metadata Coordinator
Organization's name U.S. Geological Survey Forest and Rangeland Ecosystem Science Center
Contact's role point of contact


Contact information
Phone
Voice 541-750-7343
Fax 541-758-7761

Address
Type both
Delivery point 3200 SW Jefferson Way
City Corvallis
Administrative area OR
Postal code 97331
e-mail address george_lienkaemper@usgs.gov



Metadata Maintenance

Maintenance
Update frequency unknown


Other maintenance requirements
Last metadata review date: 20011012


Thumbnail and Enclosures

Enclosure
Enclosure type File
Description of enclosure original metadata
Original metadata document, which was translated yes
Source metadata format fgdc