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Metadata for MOJVEG

 Table of Contents

Identification_Information
     Abstract
     Purpose
     Supplemental Information
Data_Quality_Information
Spatial_Data_Organization_Information
Entity_and_Attribute_Information
     Detailed Description
     Overview
Distribution_Information
Metadata_Reference_Section

  ------------------------------------------------------------------------

Identification_Information

Citation_Information
    Originator: Paxton McClurg
    Publication_Date: 05/20/98
    Title: Research Assistant
    Geospatial_Data_Presentation_Format: Arc/Info coverage
    Publication_Information
        Publication_Place:
        Publisher: Utah State Univ.- Geog. Dept.

Description
    Abstract
    This dataset represents a compilation of the USGS Biological Resource Divisions
    Gap Vegetation database from California, Nevada, Arizona, and Utah. Each state
    had its own coding system, which presented a problem when joining the four
    databases into a single unit. Therefore, the vegetation for each state was
    recoded according to the Standardized National Vegetation Classification System
    standard code named "formation".  All four states were appended.
    The vegetation mosaic is in ARC/INFO format and is projected to UTM zone 11,
    NAD83 datum, GRS1980 spheroid, and units are in meters. The mosaic includes
    a 50 km buffer region (Eastern Sierra, San Gabriel, and San Bernardino Mtns.),
    which greatly increases the vegetation diversity in this dataset. A table with
    vegetation descriptions from the NVCS is provided below.

    This is a relatively large and complex (polygon structure) database.  In order 
    for it to be able to display on standard PC systems with standard memory levels
    the coverage was intersected with a 1:100,000 quadrangle boundary layer.  This
    reduced the number of vertices necessary to identify the larger polygons in the
    database thus allowing it to be displayed using a standard Pentium grade PC.

    Purpose
    Considering that the accuracy from the 4 different state vegetation datasets
    varies and the combined dataset had to be generalized under a new coding system,
    any applications that use this dataset should only be for general and broad-
    scale purposes. Its possible that mountain ranges, low elevation valleys, and
    other large landforms can be identified using this dataset. Its also possible
    to overlay this coverage with geology or soils coverages to determine relation-
    ships.

Supplemental_Information
    Procedures_Used
    In 1996, Kathryn Thomas (USGS-BRD) worked with Utah State University
    to produce a mosaic of Mojave ecoregion vegetation, using GAP vegetation
    data from California, Nevada, Utah, and Arizona. The vegetation data had to
    be "cross-walked" over state boundaries and required a commmon coding system.                      
    The Final Draft Standardized National Vegetation Classification
    System (SNVCS) was used as a basis for defining formations.  In
    the table the numbers and nomenclature follow the SNVCS except where
    indicated.  In the draft, SNVCS alliances were indicated for the formations,
    although the list is far from complete for the southwest.  These
    alliances were used as the first indication of what the formation contained 
    and then placed the states in formations, using the state species 
    descriptions to guide placement.

    The table reflects an application of SNVCS modified to the Mojave
    Ecoregion. In a couple of cases, new formations were identified and in others
    the types of alliances/series that occurred in a formation were rearranged.  
    More categories could have been added to reflect mixed conifer types, but 
    these were lumped together.  For the herbaceous category, what constitutes 
    the difference between a tall, medium tall, and short grass had to be 
    estimated. Playas and associated vegetation were left out of the system.

    In 1998, Kathyrn Thomas took a revised SNVCS and modified it to the
    Mojave Ecoregion (see table below). "New Formations" are vegetation 
    types that could not fall under any formations in the SNVCS table. One
    in particular is the Joshua Tree, a vegetation type unique to the
    Mojave.

    In spring 1998, an additional 50km buffer was added to the existing GAP
    vegetation map covering the Mojave Desert as defined by Robert Bailey.
    This was done in order to match other databases being created for the MDEP.
    The 1996 Mojave vegetation mosaic and GAP vegetation data from California,
    Nevada, Arizona, and Utah was used for this purpose. The portion of the 
    buffer region that fell into non-Mojave California GAP regions (Sierra 
    Nevada, San Gabriel and San Bernardino Mtns.) contained vegetation types 
    not found in the 1996 Mojave vegetation mosaic. These vegetation types had 
    to be classified according to the Kathyrn Thomas's modified coding system.
    Accuracy in some of the buffer regions is highly in question, particularly
    with oaks, chapparals, and riparian types.

    For simplification purposes, color-coding was generalized to the class and
    group level(see table). Colors were assigned to general classifications, such 
    as open tree canopy, shrublands, broad-leaved, conifers, cold-deciduous,
    sub-desert, etc. Accuracy of color assignment is in question
    and should be reevaluated for any analyses that are as detailed as the
    formation level (see table above).

    Revisions
    1)1996- Kathyrn Thomas (USGS-Biological Resources Division). Modification of
    SNVCS and Gap vegetation data from the 4 states to the Mojave ecoregion.
    2)1998- Kathyrn Thomas- Modification of a revised SNVCS.
    3)1998-Paxton McClurg (Utah State University - GIS Lab). Modification of
    SNVCS and Gap vegetation data from the 4 states to a 50 km buffer region
    around the Mojave ecoregion.

    Reviews_Applied_to_Data
    Unknown

    Related_Spatial_and_Tabular_Data_Sets
    Standardized National Vegetation Classification System
    Arizona Gap Vegetation
    California Gap Vegetation
    Nevada Gap Vegetation
    Utah Gap Vegetation

    References_Cited
    Bailey,R.G. 1983. Delineation of ecosystem regions. Environmental
    Management 7:365-373.

    Edwards, T.C.,Jr., C.G.Homer, and S.D.Bassett. 1994. Land management
    categorization: a users guide. A Handbook for Gap Analysis, USDI
    National Biological Survey, University of Idaho, Moscow.

    Graham, Lee,1996. Gapveg. University of Arizona, Tuscon.

    Holland,R.F.,1986. Preliminary descriptions of the terrestrial natural
    communities of California. State of California, The Resources Agency,
    Nongame Heritage Program, Dept. Fish & Game, Sacramento 156 pp.

    Homer, Collin G. 1996 Nevada Landcover Classification Metadata. Technical
    report, Utah Cooperative Fish and Wildlife Research Unit, Utah State
    University, Logan, UT. 180 pp.

    The Nature Conservancy and Environmental Systems Research Institute,
    1994.  Final Draft Standardized National Vegetaion Classification
    System, NBS/NPS Vegetation Mapping Program For: US Dept. of Interior,
    National Biological Survey and National Park Service.

    Thomas,K.A.,1996. Vegetation and Floristic Diversity in the Mojave Desert
    of California: A Regional Conservation Evaluation. Ph.D.dissertation,
    University of California, Santa Barbara.

    Currentness_Reference:
    1) Nevada and Utah GAP vegetation - data from 1988 - 1992
    Landsat TM images and DEM data (elevation, slope, aspect) were used as
    input for cluster analysis models within ecoregions predefined by Robert
    Bailey. Modifications unknown. Public access available through CD-ROM.
    Utah and Nevada codes mentioned in above table under equilavent state codes
    can be found on these CDs.

    2) California GAP vegetation - data from 1980 - 1995
    The Mojave Region vegetation database was developed using existing maps
    as baseline source data, including the East Mojave Resource Inventory
    from Southern California Edison, the BLM West Mojave map (Clark, personal 
    communication) imagery, a current 1:150,000 road atlas (to identify areas 
    of residential or industrial development), and extensive reconnaissance level
    field survey. The revisions made by the Bureau of Land Management for their 
    Northern and Eastern a small part of the southern Mojave Desert region. The 
    revisions were incorporated in the Sonoran Desert region.

    An accuracy check of a portion of the coverage was conducted using data
    obtained by the BLM during vegetation characterization studies in the east 
    Mojave and a listing of one to four visually dominant species for the stand in
    which each transect placed was made. Each transect was not specifically 
    georeferenced to a section (typically one square mile). A GIS coverage of all 
    sections containing transects was overlain on the vegetation coverage and a 
    listing of the cover types occurring within the sections was obtained. Visual
    dominant species were compared with Holland cover types (Holland, 1986) for 
    each section and if the dominant species could be cross referenced to any of 
    the Holland cover between 65% and 100%.

    In the table above, under equivalent state codes, the CA code (ie.CA 62200)
    refers to the California Natural Diversity Data Base (Holland, 1986). For
    detailed descriptions of these codes, refer to
    http://www.biogeog.ucsb.edu/projects/gap/data/meta/landcovdd.html and select
    "Metadata Reference Information". This is CA GAP Veg.s home page.

    3) Arizona GAP vegetation - This file is temporarily not in
    distribution because of known errors. It is currently being modified by
    The Arizona Land Resource Information System (ALRIS). Refer to
    http://www.state.az.us/gis3/alris/alrishome.html and select GIS data.

    4) Standardized National Vegetation Classification System - 1994 - produced for
    USGS-NPS. Refer to http://www.its.nbs.gov:8000/npsveg/
    classification.html for detailed information.

    Maintenance_and_Update_Frequency:
    Unknown

    Access_Constraints:
    N/A

    Data_Set_Credit:
    Kathryn Thomas, Ph.D.
    Colorado Plateau Research Station, USGS-BRD
    P.O. Box 5614, Flagstaff, Arizona 86011
    520 556-7466, x235; FAX 520 556-7500

    Completeness_Report:
    As mentioned previously, the vegetation data had to be generalized under
    a common coding system in order to combine the 4 state datasets.

    Horizontal_Positional_Accuracy_Report:
    Unknown

    Vertical_Positional_Accuracy_Report:
    Unknown

    Cloud_Cover:
    N/A

    Notes
Time_Period_of_Content
    Range_of_Dates/Times
    Beginning_Date: unknown
    Ending_Date: 5/15/98
    Currentness_Reference
Status
    Progress: Complete
    Maintenance_and_Update_Frequency
Spatial_Domain
    Bounding_Coordinates
    West_Bounding_Coordinate: -118.98095786
    East_Bounding_Coordinate: -112.28205518
    North_Bounding_Coordinate: 37.78898735
    South_Bounding_Coordinate: 33.20217262

Keywords
    Theme
        Theme_Keyword_Thesaurus: None
        Theme_Keyword:  NVCS, GAP, CNDDB
    Place
        Place_Keyword_Thesaurus: None
        Place_Keyword:  Mojave Desert Ecoregion as defined by Bailey (1993) plus a 50 km buffer
    Stratum
        Stratum_Keyword_Thesaurus: None
        Stratum_Keyword:
    Temporal
        Temporal_Keyword_Thesaurus: None
        Temporal_Keyword:

Access_Constraints
Use_Constraints
Scale (1:250,000) and accuracy is a major limitation for the use of this data.

Data_Set_Credit
Security_Information
    Security_Classification_System: None
    Security_Classification:  UNCLASSIFIED
    Security_Handling_Description: None

Native_Data_Set_Environment: SunOS UNIX, ARC/INFO version 7.1.1

Cross_Reference
    Originator: Kathryn Thomas, Ph.D.
    Publication_Date: 1996
    Publication_Time:
    Title: Research Scientist
    Edition:
    Geospatial_Data_Presentation_Form: Arc/Info coverage
    Series_Information
        Series_Name:
        Issue_Identification:
    Publication_Information
        Publication_Place: Flagstaff, AZ
        Publisher: USGS-BRD
    Other_Citation_Details:
    Online_Linkage:
    Larger_Work_Citation: NVCS

  ------------------------------------------------------------------------

Data_Quality_Information

Attribute_Accuracy
    Attribute_Accuracy_Report: See Entity_Attribute_Information

    Quantitative_Attribute_Accuracy_Assessment
        Attribute_Accuracy_Value:  See Explanation
        Attribute_Accuracy_Explanation:
           Attribute accuracy is described, where present, with each
           attribute defined in the Entity and Attribute Section.

Logical_Consistency_Report: Polygon topology present.

Completeness_Report
Positional_Accuracy
    Horizontal_Positional_Accuracy
        Horizontal_Positional_Accuracy_Report:

        Quantitative_Horizontal_Positional_Accuracy_Assessment:
            Horizontal_Positional_Accuracy_Value: 250 hectare
            Horizontal_Positional_Accuracy_Explanation:  Resolution as reported

    Vertical_Positional_Accuracy
        Vertical_Positional_Accuracy_Report:
Lineage: See Supplemental_Information for overview.

Process_Steps
    Process_Step
    Process_Description: MOJAVE PROJECT COVER FINVEG21 FINVEG22
    Source_Used_Citation_Abbreviation:None
    Process_Date:  19980520
    Process_Time:  1818
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: MOJAVE BUILD FINVEG22
    Source_Used_Citation_Abbreviation:None
    Process_Date:  19980520
    Process_Time:  1920
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: MOJAVE ARCEDIT /AUTO/JUAB1/MOJAVE/FINVEG22
    Source_Used_Citation_Abbreviation:None
    Process_Date:  19980521
    Process_Time:  1112
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: MOJAVE   DOCUMENT FINVEG22 CREATE MOJAVE
    Source_Used_Citation_Abbreviation:None
    Process_Date:  19980529
    Process_Time:  1746
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: MOJAVE COPY FINVEG22 MOJVEG
    Source_Used_Citation_Abbreviation:None
    Process_Date:  19980618
    Process_Time:  1122
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: MOJAVE   DOCUMENT MOJVEG UPDATE MOJAVE
    Source_Used_Citation_Abbreviation:None
    Process_Date:  19980618
    Process_Time:  1717
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: MOJAVE   DOCUMENT MOJVEG UPDATE MOJAVE
    Source_Used_Citation_Abbreviation:None
    Process_Date:  19980619
    Process_Time:  1613
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: MOJAVE   DOCUMENT MOJVEG UPDATE MOJAVE
    Source_Used_Citation_Abbreviation:None
    Process_Date:  19980621
    Process_Time:  2322
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: MOJAVE   DOCUMENT MOJVEG UPDATE MOJAVE
    Source_Used_Citation_Abbreviation:None
    Process_Date:  19980621
    Process_Time:  2337
    Source_Produced_Citation_Abbreviation: None
    Process_Step
    Process_Description: MOJAVE   DOCUMENT MOJVEG UPDATE MOJAVE
    Source_Used_Citation_Abbreviation:None
    Process_Date:  19980622
    Process_Time:  1037
    Source_Produced_Citation_Abbreviation: None

Cloud_Cover
  ------------------------------------------------------------------------

Spatial_Data_Organization_Information

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information
    SDTS_Terms_Description
        SDTS_Point_and_Vector_Object_Type: Point
        Point_and_Vector_Object_Count: 8446
        SDTS_Point_and_Vector_Object_Type: String
        Point_and_Vector_Object_Count: 36207
        SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains'
        Point_and_Vector_Object_Count:  16614

  ------------------------------------------------------------------------

Spatial_Reference_Information

Horizontal_Coordinate_System_Definition
    Planar
        Grid_Coordinate_System
        Grid_Coordinate_System_Name: Universal_Transverse_Mercator (UTM)
           Zone_Number: 11
        Planar_Distance_Units: METERS
    Geodetic Model
        Horizontal_Datum_Name: North American Datum of 1983
        Ellipsoid_Name:  GRS1980

  ------------------------------------------------------------------------

Entity_and_Attribute_Information

Detailed_Description
    Entity_Type
    Entity_Type_Label: MOJVEG.PAT
    Entity_Type_Definition: Recoded GAP (4 states) vegetation data
    Entity_Type_Definition_Source: NVCS (National Vegetation Classification System)
    Attribute:
        Attribute_Label: -
        Attribute_Definition: Recoded GAP (4 states) vegetation data
        Attribute_Definition_Source: NVCS (National Vegetation Classification System)
        Attribute_Domain_Values
            Enumerated_Domain
                Enumerated_Domain_Value: -
                Enumerated_Domain_Value_Definition
                Enumerated_Domain_Value_Definition_Source:
    Attribute:
        Attribute_Label: AREA
        Attribute_Definition: Area of poly/region in square coverage units
        Attribute_Definition_Source: Computed
        Attribute_Domain_Values
            Enumerated_Domain
                Enumerated_Domain_Value: Positive real numbers
                Enumerated_Domain_Value_Definition
                Enumerated_Domain_Value_Definition_Source:
    Attribute:
        Attribute_Label: PERIMETER
        Attribute_Definition: Perimeter of poly/region in coverage units
        Attribute_Definition_Source: Computed
        Attribute_Domain_Values
            Enumerated_Domain
                Enumerated_Domain_Value: Positive real numbers
                Enumerated_Domain_Value_Definition
                Enumerated_Domain_Value_Definition_Source:
    Attribute:
        Attribute_Label: MOJVEG#
        Attribute_Definition: Internal feature number
        Attribute_Definition_Source: Computed
        Attribute_Domain_Values
            Enumerated_Domain
                Enumerated_Domain_Value: Sequential unique positive integer
                Enumerated_Domain_Value_Definition
                Enumerated_Domain_Value_Definition_Source:
    Attribute:
        Attribute_Label: MOJVEG-ID
        Attribute_Definition: User-assigned feature number
        Attribute_Definition_Source: User-defined
        Attribute_Domain_Values
            Enumerated_Domain
                Enumerated_Domain_Value: Integer
                Enumerated_Domain_Value_Definition
                Enumerated_Domain_Value_Definition_Source:
    Attribute:
        Attribute_Label: MOJAVE-CODE
        Attribute_Definition: Recoded GAP (4 states) vegetation data
        Attribute_Definition_Source: Kathryn Thomas, USGS-BRD, Flagstaff, AZ
        Attribute_Domain_Values
            Enumerated_Domain
                Enumerated_Domain_Value: Integer
                Enumerated_Domain_Value_Definition
                Enumerated_Domain_Value_Definition_Source:
    Attribute:
        Attribute_Label: FORMATION
        Attribute_Definition: Lowest level for this particular vegetation classification
        Attribute_Definition_Source: SNVCS (Standardized National Vegetation Classification System)
        Attribute_Domain_Values
            Enumerated_Domain
                Enumerated_Domain_Value: Text
                Enumerated_Domain_Value_Definition
                Enumerated_Domain_Value_Definition_Source:
    Attribute:
        Attribute_Label: COLOR
        Attribute_Definition: Color codes divided by groups - Higher and wetter is greener or bluer
        Attribute_Definition_Source: Paxton McClurg - Utah State University, SNVCS
        Attribute_Domain_Values
            Enumerated_Domain
                Enumerated_Domain_Value: text
                Enumerated_Domain_Value_Definition
                Enumerated_Domain_Value_Definition_Source:

 Overview_Description
    Entity_and_Attribute_Overview
    Table from SNVCS (modified by Kathyrn Thomas, USGS-BRD)
Mojave NVCS  Class     Subclass Group           Formation          Gap Veg Type
Code   Code

New  IA4Ca   Closed    Ever-      Cultivated,                        CA 11401 (Conifer 
for-         Tree      green      Plantation                         plantation)
ma-          Canopy    Forest
tion

 1   1A4Na   Closed    Ever-      Temperate        Lowland            CA 62300 (Desert Fan 
             Tree      green      broad-leaved     temperate          Palm Oasis Woodland)
             Canopy    Forest     seasonal         seasonal 
                                  evergreen        evergreen closed 
                                  closed tree      tree canopy
                                  canopy

new  IA4Nb   Closed     Ever-     Temperate        Submontane         CA 81320 (Canyon 
for-         Tree       green     broad-leaved     termperate         Live Oak Forest); CA 
ma-          Canopy     Forest    seasonal         seasonal           81330 (Interior Live 
tion                              evergreen        evergreeen         Oak Forest)
                                  closed tree      closed tree 
                                  canopy           canopy

 2   1A8Nb   Closed     Ever-     Temperate or     Rounded-crowned    NV 41 (Bristlecone 
             Tree       green     subpolar         temperate or       Forest) UT3 
             Canopy     Forest    needle-leaved    subpolar needle-   (Ponderosa Forest) 
                                  evergreen        leaved evergreen   AZ 18 (Ponderosa 
                                  closed tree      closed tree        Pine/Pinyon-
                                  canopy           canopy             Juniper); CA 85100 
                                                                      (Jeffrey Pine 
                                                                      Forest)

 3   1A8Nc   Closed     Ever-     Temperate or     Conical-crowned    NV 42 (White fir)UT 
             Tree       green     subpolar         temperate or       5 (Mountain fir)
             Canopy     Forest    needle-leaved    subpolar needle-
                                  evergreen        leaved evergreen 
                                  closed tree      closed tree 
                                  canopy           canopy

new IB2Na    Closed     Decidu-   Cold-deciduous   Lowland or         CA 81340(Black Oak 
for-         Tree       ous       closed tree      submontane cold-   Forest)
ma-          Canopy     closed    canopy           deciduous closed 
tion                    tree                       tree canopy
                        canopy

 4  1B2Nb   Closed      Decidu-   Cold-deciduous   Montane or         NV 37 (Aspen)UT 10 
             Tree       ous       closed tree      boreal cold-       (Aspen); CA 81B00 
             Canopy     closed    canopy           deciduous closed   (Aspen Forest)
                        tree                       tree canopy
                        canopy

 5  1B2Nd   Closed      Decidu-   Cold-deciduous   Temporarily        AZ 95 (Cottonwood-
             Tree       ous       closed tree      flooded cold-      Willow Forest)
             Canopy     closed    canopy           deciduous closed 
                        tree                       tree canopy
                        canopy

 6  1C3Na   Closed      Mixed     Mixed needle-    Mixed needle-      AZ 17 (Ponderosa 
             Tree       evergre-  leaved           leaved             Pine-Gambel Oak- 
             Canopy     en-       evergreen-cold-  evergreen-cold-    Juniper/Pinyon-
                        deciduo-  deciduous        deciduous          Juniper 
                        us        closed tree                         Complex)CA71410 
                        closed    canopy                              (Digger Pine-Oak 
                        tree                                          Woodland)
                        canopy

 7  IIA2Na  Open Tree   Ever-     Temperate        Temperate broad-   AZ21 (Encinal Mixed 
             Canopy     green     broad-leaved     leaved evergreen   Oak); CA 71150 
                        open      evergreen open   open tree canopy   (Interior Live Oak 
                        tree      tree canopy                         Forest);  CA 71140 
                        canopy                                        (Blue Oak Woodland); 
                                                                      CA 71150 (Interior 
                                                                      Live Oak Woodland)

 8  IIA4Na  Open Tree   Ever-     Temperate or     Rounded-crowned    NV 3,4CA 86400 
             Canopy     green     subpolar         temperate or       (Bristlecone 
                        open      needle-leaved    subpolar needle-   Pine)NV18, 1
                        tree      evergreen open   leaved evergreen 
                        canopy    tree canopy      open tree canopy

 9  IIA4Nc  Open Tree   Ever-     Temperate or     Cylindrical-       NV 5,6 (White Fir)UT 
             Canopy     green     subpolar         crowned            24 (Mountain 
                        open      needle-leaved    temperate or       Fir/Mountain Shrub)
                        tree      evergreen open   subpolar needle-
                        canopy    tree canopy      leaved evergreen 
                                                   open tree canopy

 10 IIB2Na  Open Tree   Decidu-   Cold-deciduous   Cold-deciduous     NV 37 (Aspen), UT10 
             Canopy     ous open  open tree        open tree canopy   (Aspen); CA 71210 
                        tree      canopy                              (California Walnut 
                        canopy                                        Woodland); CA 71120 
                                                                      (Black Oak 
                                                                      Woodlands); CA 71130 
                                                                      (Valley Oak 
                                                                      Woodlands); Ut 11 
                                                                      (Oak); NV 33 (Ash)

 11 IIB2Nb  Open Tree   Decidu-   Temperate or     Temporarily        CA 61700 (Mojave 
             Canopy     ous open  subpolar         flooded cold-      Riparian 
                        tree      needle-leaved    deciduous open     forest)CA61610  
                        canopy    evergreen open   tree canopy        (Modoc Great Basin 
                                  tree canopy                         Cottonwood Willow 
                                                                      Riparian Forest)UT 
                                                                      27 (Lowland 
                                                                      Riparian)NV 21 
                                                                      (Mojave Riparian)

 12 IIB3Na  Open Tree   Decidu-   Extremely        Thorn extremely    CA 61820 (Mesquite 
             Canopy     ous open  xeromorphic      xeromorphic        Bosque)AZ 97 
                        tree      deciduous open   deciduous open     (Mesquite Bosque 
                        canopy    tree canopy      tree canopy        Forest); AZ 102 
                                                                      (Cottonwood-
                                                                      Mesquite)

 13 redis-
     trib-
     uted

 14 IIIA2Nc Shrub land  Temper-                                       CA 37A00 (Interior 
                        ate                                           Live Oak 
                        broad-                                        Chaparral),CA 37200 
                        leaved                                        (Chamise 
                        ever-                                         Chaparral),CA 37400 
                        green                                         (Semi- desert 
                        shrub                                         Chaparral)AZ 28
                        land

 15 IIIA4Na Shrub land  Ever-     Microphyllous    Microphyllous      CA 35213 ( Black 
                        green     evergreen shrub  evergreen shrub    Sagebrush)CA 
                        shrub     land             land               35210(Big Sagebrush 
                        land                                          Scrub)AZ 43 

 16 IIIA5Na Shrub land  Ever-     Extremely        Broad-leaved/      CA 33100 ( Sonoran 
                        green     xeromorphic      microphyllous      Creosote Bush 
                        shrub     evergreen shrub  evergreen          Scrub)CA 34100 
                        land      land             extremely          (Mojave Creosote 
                                                   xeromorphic        Bush Scrub)AZ 54 
                                                   subdesert shrub    (Creosote Bush 
                                                   land               Scrub)AZ 55 
                                                                      (Creosotebush- 
                                                                      Bursage Scrub)AZ 56 
                                                                      (Creosote-Yucca 
                                                                      spp.Scrub)AZ 60 
                                                                      (Brittlebush- 
                                                                      Creosotebu

 17 IIIB2Na Shrub land  Decidu-   Mixed evergreen  Mixed evergreen-   NV22 (Mountain 
                        ous       - cold-          cold-deciduous     Shrub)UT 13 
                        Shrub     deciduous shrub  shrub land         (Mountain Shrub); CA 
                        land      land                                35500 (Curlleaf 
                                                                      Mahogany)

 18 IIIB2Nf Shrub land  Decidu-   Mixed evergreen  Seasonally         NV 44 (Mountain 
                        ous       - cold-          flooded mixed      Riparian)UT 26 
                        Shrub     deciduous shrub  evergreen -        (Mountain Riparian)
                        land      land             cold-deciduous 
                                                   shrub land

 19 IIIB3Na Shrub land  Decidu-   Extremely        Extremely          CA 36130 ( 
                        ous       xeromorphic      xeromorphic        Greasewood Scrub)NV 
                        Shrub     deciduous shrub  deciduous          29(Greasewood)NV 25 
                        land      land             subdesert shrub    (Hopsage)UT 36 
                                                   land without       (Greasewood)
                                                   succulents

 20 IIIB3Nb Shrub land  Decidu-   Extremely        Intermittently     CA 63820 (Arrowweed 
                        ous       xeromorphic      flooded            Scrub)CA 63300 
                        Shrub     deciduous shrub  extremely          (Southern Riparian 
                        land      land             xeromorphic        Scrub)AZ 104 (Mixed 
                                                   subdesert shrub    Riparian Scrub)AZ 
                                                   land without       106 (Low-lyin
                                                   succulents

 21 IIIC3Na Shrub land  Mixed     Extremely        Extremely          CA 34240 (Mixed 
                        evergre-  xeromorphic      xeromorphic        Mojave Woody and 
                        en-       mixed            deciduous          Succulent Scrub); CA 
                        deciduo-  evergreen-       subdesert shrub    33200 (Sonoran 
                        us shrub  deciduous shrub  land               Desert Mixed Scrub); 
                        land      land                                CA 39000 (Upper 
                                                                      Sonoran Subscrub 
                                                                      Scrub)

 22 IIIC3Nb Shrub land  Mixed     Extremely        Mixed evergreen-   AZ 78 (Crucifixion 
                        evergre-  xeromorphic      deciduous          Thorn Scrub);AZ 79 
                        en-       mixed            subdesert shrub    (Smoketree Scrub);AZ 
                        deciduo-  evergreen-       land               80 (Catclaw Acacia 
                        us shrub  deciduous shrub                     scrub);NV 35 
                        land      land                                (Mesquite); AZ 62 
                                                                      (Mojave Catclaw 
                                                                      Acacia Mixed Scrub)

 23 IIIB3Nb Shrub land  Decidu-   Extremely        Intermittently     CA 62200 (Desert Dry 
                        ous       xeromorphic      flooded            Wash Woodland)CA 
                        Shrub     deciduous shrub  extremely          63700 (Mojave Desert 
                        land      land             xeromorphic        Wash Scrub)AZ 103 
                                                   deciduous          (Leguminous short-
                                                   subdesert shrub    Tree 
                                                   land               Forest/Shrubland)

 24  IIIA5Nb Shrub land Ever-     Extremely        Facultatively      CA 3611
                        green     xeromorphic      deciduous 
                        shru-     evergreen shrub  extremely 
                        bland     land             xeromorphic 
                                                   subdesert

New  IIIC2Na Shrub land Mixed     Mixed evergreen  Mixed evergreen    CA 35100 (Great 
for-                    evergre-  - cold-          - cold-deciduous   Basin Mixed Scrub); 
ma-                     en-       deciduous        shrubland          AZ 51 (Great Basin 
tion                    deciduo-  shrubland                           Winterfat Mixed 
                        us shrub                                      Scrub)
                        land

New  IIIC3Na Shrub land Mixed     Extremely 
for-                    evergre-  xeromorphic 
ma-                     en-       mixed 
tion                    deciduo-  evergreen-
                        us shrub  deciduous shrub 
                        land      land

25   IIIC3Nb Shrub land Mixed     Extremely        Mixed evergreen    CA 34210 (Mojave
                        evergre-  xeromorphic      - deciduous        Mixed Woody Scrub)
                        en-       mixed            subdesert shrub 
                        deciduo-  evergreen-       land
                        us shrub  deciduous shrub 
                        land      land

New  IIIA5Ne Shrub land Ever-     Extremely        Extremely          AZ 63 (Joshuatree); 
for-                    green     xeromorphic      xeromorphic        CA 73000 (Joshua 
ma-                     shru-     evergreen        evergreen          Tree Woodland);
tion                    bland     shrubland        shrubland with  
                                                   sparse tree 
                                                   layer

New  IVA1    Dwarf      Eergreen  Needle-leaved                       CA 94000 (Alpine 
for-         shrubland  dwarf-    or                                  Dwarf Scrub)
ma-                     shrubla-  microphyllous 
tion                    nd        evergreen 
                                  dwarf-shrubland

26   types 
     redis-
     trib-
     uted

27A  VA6Nj   Herbaceous Peren-    Temperate or     Intermittently     AZ 35 (Mixed Grass-
             vegetation nial      subpolar         flooded            Mixed Scrub)AZ 37 
                        grami-    grassland with   temperate or       (Mixed Grass-
                        noid      a sparse tree    subpolar           Saltbush)NV 
                        vegeta-   layer            grassland with     23(Sagebrush/Perenn-
                        tion                       sparse needle-     ial Grass)UT 15 
                                                   leaved evergreen   (Sagebrush/Perennial 
                                                   tree layer         Grass)

27B  VA6Nk   Herbaceous Peren-    Temperate or     Temporarily        AZ 35 (Mixed Grass-
             vegetation nial      subpolar         flooded            Mixed Scrub)AZ 37 
                        grami-    grassland with   temperate or       (Mixed Grass-
                        noid      a sparse tree    subpolar           Saltbush)NV 
                        vegeta-   layer            grassland with     23(Sagebrush/Perenn-
                        tion                       sparse broad-      ial Grass)UT 15 
                                                   leaved evergreen   (Sagebrush/Perennial
                                                   tree layer         Grass)

28   VA7Ne/f Herbaceous Peren-    Temperate or     Medium-tall        CA 34220 (Mojave 
             Vegetation nial      subpolar         temperate or       Mixed Steppe)AZ 
                        grami-    grassland with   subpolar           42(Semidesert Mixed 
                        noid      a sparse shrub   grassland with     Grass-Mixed Scrub)UT 
                        vegeta-   layer            sparse needle-     33 (Desert 
                        tion                       leaved or          Grassland); AZ 39 
                                                   microphyllous      (Semidesert Tobosa 
                                                   evergreen shrub    Grass-Scrub)
                                                   layer/Medium-
                                                   tall temperate 
                                                   or subpolar 
                                                   grassland with  
                                                   sparse drought-
                                                   deciduous shrub 
                                                   layer

29   VA5Nl   Herbaceous Peren-    Temperate or     Semipermanently    AZ 107 ( Reed-
             Vegetation nial      subpolar         flooded            Cattail Marsh)UT38 
                        grami-    grassland        temperate or       (Wetland)NV 43 
                        noid                       subpolar           (Wetland)CA 52420 
                        vegeta-                    grassland          (Transmontane 
                        tion                                          Freshwater Marsh);CA 
                                                                      52320 (Transmontane 
                                                                      Alkali Marsh)

30   VA5Nd   Herbaceous Peren-    Temperate or     Medium-tall        CA 42160 (Desert 
             Vegetation nial      subpolar         bunch temperate    Native 
                        grami-    grassland        or subpolar        Grassland)NV27 
                        noid                       grassland          (Grassland)UT 16 
                        vegeta-                                       (Grassland)
                        tion 

31   VA5Nk   Herbaceous Peren-    Temperate or     Seasonally         UT 19 (Wet meadow); 
             Vegetation nial      subpolar         flooded            CA 45310 (Alkali 
                        grami-    grassland        temperate or       Meadow) 
                        noid                       subpolar 
                        vegeta-                    grassland
                        tion

32   Moved 
     to 29

33   VD2Nd   Herbaceous Annual    Temperate or     Short temperate    CA 42200 (Non-Native 
             Vegetation grami-    subpolar annual  annual grassland   Grassland)
                        noid or   grasslands or 
                        forb      forb vegetation
                        vegeta-
                        tion

34   VB2Nb   Herbaceous Peren-    Temperate or     Low temperate or   NV 24 (Alpine)UT 17 
             Vegetation nial      subpolar         subpolar           (Alpine)
                        forb      perennial forb   perennial forb 
                        vegeta-   vegetation       vegetation
                        tion

35   VD2Nc   Herbaceous Annual    Temperate or     Low desert or      CA 42300 (Wildflower
             Vegetation grami-    subpolar annual  subdesert          Field)
                        noid or   grasslands or    ephemeral or 
                        forb      forb vegetation  episodic annual 
                        vegeta-                    forb vegetation
                        tion

New  VIIB1   Sparse     Boulder,  Sparsely                            CA 91120 (Sierra 
for-         vegetation gravel,   vegetated                           Nevada Fell-Field)
ma-                     cobble,   talus/scree 
tion                    or talus  slopes
                        sparse 
                        vegeta-
                        tion

36   VIIC1Na Sparse     Uncon-    Sparsely                            NV 32 (Sand Dunes)Ca 
             vegetation soli-     vegetated sand                      22200 ( Dunes and 
                        dated     dunes                               Sand Fields)
                        material 
                        sparse 
                        vegeta-
                        tion

37   VIIC4Nb Semiperma- Uncon-    Sparsely         Intermittently     NV 30 (Playas)CA 
             nently     soli-     vegetated soil   flooded mud        36120, 46000 
             flooded    dated     flats            flats              (Deserting Scrub, 
             temperate  material                                      Alkali Playa)UT 37 
             or         sparse                                        (Pickleweed 
             subpolar   vegeta-                                       barrens)AZ 86 
             grassland  tion                                          (Playa/Semipermanent 
                                                                      Water)

38   Urban                                                            CA 11100 (Urban)NV 
                                                                      40 (Urban, includes 
                                                                      mining which occurs 
                                                                      in barren in 
                                                                      CA.)AZ83, 84 
                                                                      (Urban/Industrial)UT 
                                                                      31 (Urban)

39   Agriculture                                                      CA 11200 
                                                                      (Agriculture);NV 39 
                                                                      (Agriculture);UT 30 
                                                                      (Agriculture);AZ 
                                                                      82,85 (Agriculture; 
                                                                      MixedAgriculture/Ur-
                                                                      ban/Industrial); CA 
                                                                      22300

40   Water                                                            CA 11510, 11520 
                                                                      (Stream/River, 
                                                                      Lake)NV1, 34 
                                                                      (Water/Shallow 
                                                                      water)UT 1(Water);AZ 
                                                                      87 (Water)

41   Barren                                                           CA 11710, 
                                                                      11750,11770 (Dry 
                                                                      Salt Flat,Quarry, 
                                                                      Mixed Barren Land)NV  
                                                                      2(Barren)UT 20 
                                                                      (Barren )UT 29 
                                                                      (Lava)

42   Dis-                                                             CA 63810 (Tamarisk 
     turbed,                                                          Scrub)
     inva-
     sive 
     exotics