Vegetation - Owens Valley and Jawbone [ds2874]

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Tags
vegetation, Mojave Desert, Desert Renewable Energy Conservation Plan, vegetation classification, Inyo County, Kern County, Los Angeles County, Riverside County, San Bernardino County, Imperial County


Summary

Under contract to the U.S. Bureau of Land Management (BLM), Aerial Information Systems (AIS) created a fine-scale vegetation map of portions of the Mojave and Sonoran Deserts in California. AIS subcontracted the California Native Plant Society (CNPS) to conduct classification development work needed for this project, as well as accuracy assessment (AA) field data collection. The California Department of Fish and Wildlife's (CDFW) Vegetation Classification and Mapping Program (VegCAMP) provided in-kind service to allocate and score the AA. The primary purpose was to develop an accurate vegetation map for portions of the California desert as it pertains to renewable energy sources and conservation opportunities, helping planners identify high quality habitat and rare communities. This map consists of 27,100 polygons representing 749,025 acres of mapped vegetation in Owens Valley, the Scodie Mountains, and the Piute Mountains at the southern end of the Sierra Nevadas. Vegetation types were crosswalked from the AIS classification to NVCS/MCV, CalVeg, and CWHR.

Description

The U.S. Bureau of Land Management (BLM) contracted Aerial Information Systems, Inc. (AIS) to continue vegetation classification development and fine-scale vegetation mapping of 1,016,668 acres over four subareas within Inyo, Kern, and Imperial counties of the Desert Renewable Energy Conservation Plan (DRECP) region. The four subareas are designated as Salton Sea South (224,763 acres), Jawbone South (204,133 acres), Owens Valley (392,906 acres), and Picacho (194,866 acres). Work performed is based on the classification and mapping standards as outlined in the Survey of California Vegetation, Classification, and Mapping Standards developed by the California Department of Fish and Wildlife's (CDFW) Vegetation, Classification, and Mapping Program (VegCAMP) (VegCAMP, 2020). California Native Plant Society (CNPS), as a subcontractor to AIS, conducted any classification development work needed for this project and conducted the accuracy assessment surveys. The subareas included in this map are Jawbone North (151,986 acres), Jawbone South (204,133 acres), and Owens Valley (392,906 acres). BIOS ds735 contains the other areas.

The previous mapping for the DRECP region was conducted in two phases from 2011 to 2016 for the California Energy Commission. The maps were primarily produced to support the DRECP by helping planners more accurately identify high quality habitat and rare communities as they consider renewable energy sources and conservation opportunities. In 2011-2012 AIS and VegCAMP created a fine-scale vegetation map covering approximately six million acres of portions of the Mojave and Sonoran Deserts in southern California (Menke et al., 2013). In addition, mapping of 95,981 acres within Rice and Vidal Valleys in the Colorado Desert portion of the Sonoran Desert was completed by AIS in 2013-2014 as an extension to the original project. Subsequently, between 2014 and 2016, AIS was tasked to create a fine-scale vegetation map of 2,195,415 acres of desert in Inyo, San Bernardino, Riverside, and Imperial counties in southern California. Areas mapped include the eastern and central portions of the Mojave Desert as well as the Lower Colorado Valley (also referred to as the Colorado Desert), and the Arizona Upland subdivisions of the Sonoran Desert (Menke et al., 2016).

The vegetation classification follows Federal Geographic Data Committee (FGDC) and National Vegetation Classification Standards (NVCS). The classification is based on new and previous survey and classification work. The map was produced applying heads-up digitizing techniques using a base of 2016 or 2018 one-meter National Agricultural Imagery Program (NAIP) imagery (true-color and color infrared), in conjunction with ancillary data and imagery sources. Map polygons are assessed for Vegetation Type, Percent Cover, Exotics, Development Disturbance, and other attributes. The minimum mapping unit (MMU) is 10 acres; exceptions are made for wetlands and certain wash types (which were mapped to a 1 or 5 acre MMU, depending on type) and areas characterized as Land Use polygons (which were mapped to a 2.5 acre MMU). In the progression to non-desert areas the MMU transitioned to 1 acre for upland types and 1/4 acre for special types. Field reconnaissance and accuracy assessment enhanced map quality. There were a total of 126 mapping classes. The overall accuracy assessment ratings for the final vegetation map were 86.23 percent for User's Accuracy, and 87.9 for Producer's Accuracy.

Accuracy assessment ratings for the subareas included in this map are as follows:

Owens Valley: User's Accuracy 83.9, Producer's Accuracy 85.4

Jawbone North: User's Accuracy 86.7, Producer's Accuracy 85.5

Jawbone South: User's Accuracy 82.8, Producer's Accuracy 84.3

For detailed information please refer to the following reports:

Reyes, E., J. Evens, A. Glass, Sikes, K, Keeler-Wolf, T., D. Johnson, S. Winitsky, J. Menke and A. Hepburn. 2020 CALIFORNIA VEGETATION MAP IN SUPPORT OF THE DESERT RENEWABLE ENERGY CONSERVATION PLAN . U.S. Bureau of Land Management; 12/2020.

Menke, J., E. Reyes, A. Hepburn, D. Johnson and J. Reyes. California Vegetation Map in Support of the Desert Renewable Energy Conservation Plan (2014-2016 Additions). Aerial Information Systems; 5/2016.

Menke, J., E. Reyes, A. Glass, D. Johnson and J. Reyes. 2013 California Vegetation Map in Support of the Desert Renewable Energy Conservation Plan. California Dept. of Fish and Wildlife, California Energy Commission; 4/2013.

Credits

Data was produced by Aerial Information Systems and CDFW's Biogeographic Data Branch.

Use limitations

License: This work is licensed under Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ ). Using the citation standards recommended for BIOS datasets ( https://www.wildlife.ca.gov/Data/BIOS/Citing-BIOS ) satisfies the attribution requirements of this license.

Disclaimer : The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.

CDFW appreciates learning how our datasets are being used so that we can leverage support for classifying and mapping new areas and let users know of any updates. Please contact VegCAMP (https://wildlife.ca.gov/Data/VegCAMP).

This work is licensed under Creative Commons Attribution 4.0 International License . You are free to use, copy, build upon, and redistribute this work per the terms of the license.

Other citation details

Report links:

http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=187919

http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=131751

http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=62826

Extent

West -118.516302 East -117.829790
North 37.096829 South 35.103232

Scale Range
Maximum (zoomed in) 1:5,000
Minimum (zoomed out) 1:150,000,000

ArcGIS Metadata

Topics and Keywords

* Content type Downloadable Data


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Citation

Title Vegetation - Owens Valley and Jawbone [ds2874]
Publication date 2021-11-1700:00:00


Presentation formats * digital map


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Citation Contacts

Responsible party
Individual's name Debbie Johnson
Organization's name Aerial Information Systems, Inc.
Contact's position General Manager
Contact's role originator


Contact information


Responsible party
Individual's name Christina Lund
Organization's name Bureau of Land Management
Contact's role owner


Contact information


Responsible party
Individual's name Rosie Yacoub
Organization's name CDFW Vegetation Classification and Mapping Program
Contact's position GIS Analyst
Contact's role point of contact


Contact information


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Resource Details

Dataset languages * English(UNITED STATES)
Dataset character set utf8 - 8 bit UCS Transfer Format


Status completed
Spatial representation type * vector


Supplemental information
Classification The floristic vegetation classification developed for the DRECP region is a means to organize and catalog the vegetation alliance, association, or plant community stands that occur within a given area. The floristic classification is derived from, and is represented by, the classification plot information collected through a limited amount of point data surveyed in and/or extrapolated from an area. The floristic vegetation classification and corresponding descriptions and keys are developed from a multi-step process through the collaboration of CDFW, CNPS, NatureServe, and other partners, and is based on the hierarchical National Vegetation Classification System (NVCS). Delineation Rules In this project, the MMU for upland vegetation is 10 acres. This encompasses the majority of the stands mapped. Exceptions were created for vegetation stands of special significance. In this mapping effort, riparian vegetation, wetlands, and certain wash types were mapped to a 1 acre MMU. Another exception to the upland vegetation MMU involved stands of allscale scrub (Atriplex polycarpa), California joint fir (Ephedra californica), and cheesebush (Ambrosia salsola) occurring in washes, where they were mapped with a 5 acre MMU. Where these three types occurred outside of washes, a 10 acre MMU was applied. Polygons representing land use were mapped with a 2.5 acre MMU (see Appendix E for more detail). For non-desert areas the MMU for upland types is 1 acres, and 1/4 acre for riparian and wetland types. In the transition zone from desert to non-desert areas polygon MMU graded from 10 acres to 1 acre. This transition criteria applies to the Jawbone South and Owens Valley subareas. Jawbone South transitions from the desert foothills to the interior southern Sierra Nevada with watersheds draining westward to the Central Valley. In Owens Valley there is a transition from the valley desert vegetation to the higher elevation Sierra Nevada vegetation. In addition the Owens River floodplain was mapped to the 1/4 acre criteria due to its setting being more non-desert-like. Reconnaissance Between January 2018 and August 2019, AIS conducted eleven field reconnaissance trips dispersed throughout the mapping area with one crew per trip, collecting over 10,200 reconnaissance observations. Prior to each trip, AIS staff reviewed imagery on-screen to identify and select potential reconnaissance sites in close proximity to roads. Sites were selected to represent different vegetation types and percent cover, as well as variations in geography, landform, and abiotic factors such as percent slope, aspect, shape of the slope, and elevation. Accuracy Assessment To validate the vegetation maps, an accuracy assessment (AA) was performed in each subarea. Polygons from the vegetation geodatabases were allocated for AA using a stratified random sampling, in which allocated polygons were distributed across the mapped units so that both rare and common types were represented. For the contracted subareas, CDFW staff provided in-kind time to allocate the accuracy assessment polygons. The sample allocation of polygons to select for visitation took the following parameters into consideration: land ownership, proximity to roads and trails (e.g., within 500 meters), other accessibility issues (e.g., slope steepness), and a targeted number of allocated polygons based on the number of vegetation types. A fuzzy logic method was used to score each AA survey, rather than simply denoting whether a sample was correct or incorrect (Congalton and Green 2009, Gopal and Woodcock 1994, Hagen 2003). Each field-verified polygon was scored according to a set of decision rules, with a total of 5 possible points for each. Scores were summed for each vegetation type, then divided by the total possible score and multiplied by 100 for a percent accuracy. Once AA review was completed, any types not achieving 80% accuracy were further evaluated in consultation between the ecologists and mapping staff. The photointerpreters then revised the polygons based on the AA results.
* Processing environment Microsoft Windows 10 Version 10.0 (Build 19042) ; Esri ArcGIS 12.8.3.29751


Credits
Data was produced by Aerial Information Systems and CDFW's Biogeographic Data Branch.
ArcGIS item properties
* Name ds2874
* Location file://\\geodata.\bios\WorkArea\BIOSOnline\Refresh\TODOData\BIOSOnlineData.gdb
* Access protocol Local Area Network

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Extents

Extent
Geographic extent
Bounding rectangle
Extent type Extent used for searching
* West longitude -118.516302
* East longitude -117.829790
* North latitude 37.096829
* South latitude 35.103232
* Extent contains the resource Yes

Extent in the item's coordinate system
* West longitude 135132.355200
* East longitude 192630.046900
* South latitude -321577.091700
* North latitude -101134.250000
* Extent contains the resource Yes

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Resource Points of Contact

Point of contact
Individual's name Debbie Johnson
Organization's name Aerial Information Systems, Inc.
Contact's position General Manager
Contact's role originator


Contact information


Point of contact
Individual's name Christina Lund
Organization's name Bureau of Land Management
Contact's role owner


Contact information
Address
Type
e-mail address clund@blm.gov

HideContact information


Point of contact
Individual's name Rosie Yacoub
Organization's name CDFW Vegetation Classification and Mapping Program
Contact's position GIS Analyst
Contact's role point of contact


Contact information


HideResource Points of Contact

Resource Constraints

Constraints
Limitations of use

License: This work is licensed under Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ ). Using the citation standards recommended for BIOS datasets ( https://www.wildlife.ca.gov/Data/BIOS/Citing-BIOS ) satisfies the attribution requirements of this license.

Disclaimer : The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.

CDFW appreciates learning how our datasets are being used so that we can leverage support for classifying and mapping new areas and let users know of any updates. Please contact VegCAMP (https://wildlife.ca.gov/Data/VegCAMP).

This work is licensed under Creative Commons Attribution 4.0 International License . You are free to use, copy, build upon, and redistribute this work per the terms of the license.

Other citation details

Report links:

http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=187919

http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=131751

http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=62826


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Reference system identifier
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Spatial Data Properties

Vector
* Level of topology for this dataset geometry only


Geometric objects
Feature class name ds2874
* Object type composite
* Object count 0

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ArcGIS Feature Class Properties
Feature class name ds2874
* Feature type Simple
* Geometry type Polygon
* Has topology FALSE
* Feature count 0
* Spatial index TRUE
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Geoprocessing history

Process
Date 2022-01-2808:53:17
Tool location c:\program files\arcgis\pro\Resources\ArcToolbox\toolboxes\Conversion Tools.tbx\FeatureClassToFeatureClass
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Include in lineage when exporting metadata No


Process
Date 2022-01-2808:53:38
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Date 2022-01-2808:53:51
Tool location c:\program files\arcgis\pro\Resources\ArcToolbox\toolboxes\Data Management Tools.tbx\Rename
Command issued
Include in lineage when exporting metadata No


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Distribution

Distribution format
* Name File Geodatabase Feature Class


Transfer options
Online source
Location https://filelib.wildlife.ca.gov/Public/BDB/GIS/BIOS/Public_Datasets/2800_2899/ds2874.zip
Function performed download

Online source
Location https://www.wildlife.ca.gov/Data/BIOS
Function performed information

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Fields

Details for object ds2874
* Type Feature Class
* Row count 0


Field OBJECTID
* Alias OBJECTID
* Data type OID
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* Field description
Internal feature number.
* Description source
Esri
* Description of values
Sequential unique whole numbers that are automatically generated.


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Field Shape
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Field description
The code for a vegetation type or an unvegetated type like playa; or a code for a land use for polygons that are not natural vegetation (please see the classification list and key). Referred to as Map Unit in the mapping report. Codes correspond to vegetation types as follows: 1111 Quercus douglasii Alliance 1112 Quercus lobata Alliance 1113 Quercus chrysolepis Alliance 1114 Quercus wislizeni Alliance 1115 Juglans californica Alliance 1116 Aesculus californica Alliance 1117 Quercus agrifolia Alliance 1118 Quercus kelloggii Forest Alliance 1121 Pinus sabiniana Alliance 1122 Juniperus californica Alliance 1123 Pinus coulteri Alliance 1211 Pseudotsuga macrocarpa Alliance 1212 Abies concolor Alliance 1213 Pinus jeffreyi Alliance 1214 Pinus lambertiana Alliance 1311 Pinus monophylla Alliance 1312 Juniperus occidentalis Alliance 1410 Southwestern North American riparian evergreen and deciduous woodland Group 1411 Populus fremontii Fraxinus velutina Salix gooddingii Alliance 1414 Platanus racemosa Alliance 1415 Washingtonia filifera Alliance 1416 Salix gooddingii Salix laevigata Alliance 1420 Southwestern North American riparian wash/scrub Group 1422 Baccharis salicifolia Alliance 1423 Baccharis emoryi Baccharis sergiloides Alliance 1424 Salix exigua Alliance 1425 Forestiera pubescens Alliance 1426 Sambucus nigra Alliance 1427 Salix lasiolepis Alliance 1428 Vitis arizonica Vitis girdiana Alliance 1431 Phragmites australis Arundo donax Semi-natural Stands 1432 Tamarix spp. Semi-natural Stands 1433 Saccharum ravennae Semi-Natural Stands 1511 Alnus rhombifolia Forest Alliance 1512 Populus trichocarpa Alliance 1521 Betula occidentalis Alliance 1522 Cornus sericea Rosa woodsii Ribes spp. Alliance 1611 Eucalyptus spp. Ailanthus altissima Robinia pseudoacacia Semi-natural Alliance 1621 Phoenix dactylifera Washingtonia filifera Semi-natural Stands 2111 Arctostaphylos glauca Alliance 2112 Adenostoma fasciculatum Alliance 2113 Ceanothus crassifolius Alliance 2115 Adenostoma fasciculatum Salvia mellifera Alliance 2116 Ceanothus cuneatus Alliance 2117 ArctostaphylosviscidaAlliance 2121 Arctostaphylos glandulosa Alliance 2123 Ceanothus oliganthus Ceanothus leucodermis Alliance 2131 Cercocarpus montanus Alliance 2132 Quercus berberidifolia Alliance 2134 Prunus ilicifolia Heteromeles arbutifolia Alliance 2210 Central and south coastal California seral scrub Group 2211 Gutierrezia californica Provisional Alliance 2214 Ericameria linearifolia Cleome isomeris Alliance 2216 Malacothamnus fasciculatus - Malacothamnus spp. Alliance 2217 Corethrogyne filaginifolia Eriogonum (elongatum, nudum) Alliance 2221 Eriogonum fasciculatum (Viguiera parishii) Alliance 2222 Eriogonum wrightii Eriogonum heermannii Buddleja utahensis Alliance 2223 Salvia mellifera Alliance 2224 Keckiella antirrhinoides Alliance 2225 Artemisia californica Alliance 2226 Eriogonum fasciculatum Alliance 2300 California annual and perennial grassland Macrogroup 2305 California annual and perennial grassland (Native component) Mapping Unit 2310 California annual forb/grass vegetation Group 2311 Eschscholzia (californica) Lupinus (nanus) Alliance 2312 Amsinckia (menziesii, tessellata) Phacelia spp. Alliance 2313 Lasthenia californica Plantago erecta Vulpia microstachys Alliance 2314 Monolopia (lanceolata) Coreopsis (calliopsidea) Alliance 2315 Plagiobothrys nothofulvus Alliance 2322 Nassella spp. Melica spp. Alliance 2330 Mediterranean California naturalized annual and perennial grassland Group 2331 Brassica tournefortii Malcomia africana Semi-natural Stands 2332 Bromus rubens Schismus (arabicus, barbatus) Semi-natural Stands 2333 Lolium perenne Semi-natural Stands 2334 Pennisetum setaceum Semi-natural Stands 3110 Vancouverian and Rocky Mountain naturalized annual grassland Group 3111 Bromus tectorum Taeniantherum caput-medusae Semi-natural Stands 3112 Isatis tinctoria Salsola tragus Ruderal Annual Forb Alliance 3121 Elymus multisetus Provisional Alliance 3122 Aristida purpurea Elymus elymoides Poa secunda Alliance 3211 Ribes quercetorum Provisional Alliance 3212 Ceanothus cordulatus Ceanothus integerrimus Alliance 3221 Poa secunda Muhlenbergia richardsonis Carex douglasii Provisional Alliance 3312 Quercus john-tuckeri Alliance 3313 Quercus palmeri Alliance 3314 Quercus cornelius-mulleri Alliance 3315 Adenostoma sparsifolium Alliance 3316 Ceanothus greggii Fremontodendron californicum Alliance 3321 Rhus ovata Alliance 3400 Western North American Freshwater Marsh Marcrogroup 3410 Arid West freshwater emergent marsh Group 3412 Schoenoplectus (acutus, californicus) Alliance 3416 Typha (angustifolia, domingensis, latifolia) Alliance 3510 Californian mixed annual/perennial freshwater vernal pool/swale/plain bottomland Group 3511 Deinandra fasciculata Alliance 3512 Cressa truxillensis Distichlis spicata Alliance 3600 Western North America Wet Meadow and Low Shrub Carr Macrogroup 3610 Californian warm temperate marsh/seep Group 3611 Juncus arcticus (var. balticus, mexicanus) Alliance 3612 Leymus cinereus Leymus triticoides Alliance 3613 Muhlenbergia rigens Alliance 3700 Warm Semi-Desert/Mediterranean Alkali-Saline Wetland Macrogroup 3712 Sporobolus airoides Muhlenbergia asperifolia Spartina gracilis Alliance 3713 Anemopsis californica Helianthus nuttallii Solidago spectabilis Alliance 3715 Bolboschoenus maritimus, Schoenoplectus americanus Mapping Unit 3716 Crypsis schoenoides Mapping Unit 3717 Bolboschoenus maritimus Alliance 3718 Schoenoplectus americanus Alliance 3721 Allenrolfea occidentalis Alliance 3722 Atriplex lentiformis Alliance 3723 Atriplex spinifera Alliance 3724 Frankenia salina Alliance 3725 Suaeda moquinii Mapping Unit 3726 Distichlis spicata Alliance 3727 Salicornia depressa Herbaceous Alliance 3811 Frangula californica Alliance 4110 Lower bajada and fan Mojavean-Sonoran desert scrub Group 4111 Ambrosia dumosa Alliance 4113 Atriplex polycarpa Alliance 4114 Encelia farinosa Alliance 4115 Larrea tridentata Ambrosia dumosa Alliance 4118 Larrea tridentata Encelia farinosa Alliance 4119 Larrea tridentata Alliance 4122 Pleuraphis rigida Alliance 4124 Cylindropuntia bigelovii Alliance 4125 Sphaeraicea (ambigua, coccinea, parvifolia) Alliance 4152 Parkinsonia microphylla Provisional Alliance 4153 Prunus fremontii Alliance 4211 Ephedra californica Alliance 4212 Lepidospartum squamatum Alliance 4213 Ericameria paniculata Alliance 4219 Psorothamnus fremontii Psorothamnus polydenius Alliance 4221 Pluchea sericea Alliance 4222 Prosopis glandulosa Prosopis velutina Prosopis pubescens Alliance 4226 Acacia greggii Hyptis emoryi Justicia californica Alliance 4227 Parkinsonia florida Olneya tesota Alliance 4229 Castela emoryi Special Stands 4231 Psorothamnus schottii Alliance 5111 Atriplex canescens Alliance 5112 Atriplex confertifolia Alliance 5210 Intermontane seral shrubland Group 5211 Encelia (actoni, virginensis) Viguiera reticulata Alliance 5212 Ericameria nauseosa Alliance 5214 Gutierrezia sarothrae Gutierrezia microcephala Provisional Alliance 5217 Ericameria nauseosa Atriplex lentiformis Mapping Unit 5311 Artemisia tridentata Alliance 5410 Intermontane deep or well-drained soil scrub Group 5412 Krascheninnikovia lanata Alliance 5416 Ericameria teretifolia Alliance 5417 Ephedra viridis Alliance 5419 Ephedra nevadensis - Lycium andersonii - Grayia spinosa Alliance 5420 Mojave and Great Basin upper bajada and toeslope Group 5421 Coleogyne ramosissima Alliance 5422 Purshia tridentata Artemisia tridentata Alliance 5423 Yucca brevifolia Alliance 5424 Yucca schidigera Alliance 5425 Menodora spinescens Alliance 5430 Southern Great Basin semi-desert grassland Group 5431 Achnatherum speciosum Alliance 5432 Pleuraphis jamesii Alliance 5433 Achnatherum hymenoides Alliance 5440 Intermountain shallow/calcareous soil scrub Group 5441 Cercocarpus ledifolius Alliance 5442 Purshia stansburiana Alliance 5443 Cercocarpus intricatus Alliance 5511 Sarcobatus vermiculatus Alliance 6110 North American warm desert bedrock cliff and outcrop Group 6111 Atriplex hymenelytra Alliance 6112 Ephedra funereal Alliance 6113 Mud Hills sparsely vegetated ephemeral herbs Mapping Unit 6114 Unvegetated wash and river bottom Mapping Unit 6115 Massive sparsely vegetated rock outcrop Mapping Unit 6116 Sparsely vegetated playa Mapping Unit 6117 Chorizanthe rigida Geraea canescens Desert Pavement Sparsely Vegetated Alliance 6118 Peucephyllum schottii Pleurocoronis pluriseta Alliance 6119 Aloysia wrightii Pericome caudate Ephedra nevadensis Alliance 6120 North American warm desert dunes and sand flats Group 6121 Dicoria canescens Abronia villosa Alliance 7111 Ephedra viridis Chrysothamnus viscidiflorus Rhus trilobata Alliance 7211 Ambrosia salsola Bebbia juncea Alliance 7212 Prunus fasciculata Salazaria mexicana Alliance 7222 Chilopsis linearis Psorothamnus spinosus Alliance 7411 Suaeda moquinii Isocoma acradenia Alliance 7520 Lotus scoparius Lupinus albifrons Eriodictyon spp. Alliance 9200 Agriculture 9210 Woody Agriculture (orchards, vineyards) 9220 Non-woody Row and Field Agriculture 9230 Irrigated Pastures 9300 Built-up & Urban Disturbance 9310 Urban Window 9320 Anthropogenic Areas of Little or No Vegetation 9400 Restoration 9500 Exotic Trees 9501 Eucalyptus 9700 Burn Areas 9701 Sparsely Vegetated Recently Burned Areas 9800 Water 9801 Perennial Stream Channel (Open Water) 9803 Small Earthen-dammed Ponds and Naturally Occurring Lakes 9804 Major Canals and Aqueducts (Open Water) 9805 Water Impoundment Feature
Description source
http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=187919
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The finest level of vegetation type mapped (alliance, association, group or macrogroup); or land use for polygons that are not natural vegetation, per the mapping classification. Referred to as Map Unit in the mapping report.
Description source
http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=187919
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The standardized name of the vegetation description used in the 2008 National Vegetation Classification System (see http://usnvc.org/) . Since the NVCS does not have categories for human land use or otherwise unvegetated land, those descriptions were drawn from the California Wildlife Habitat Relationship.
Description source
http://usnvc.org/
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The standardized level of the vegetation description used in the 2008 National Vegetation Classification System (see http://usnvc.org/) .
Description source
http://usnvc.org/
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An estimate of the total percent cover of conifers in a stand. Percent cover, also referred to as density, is a quantitative estimate of the aerial extent of the living plants for each vegetation layer within a stand. Cover is the primary metric used to quantify the importance or abundance of a life form and/or species.
Description source
http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=187919
List of values
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Description >0-1%


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Description >1-5%


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Description >5-15%


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An estimate of the total percent cover of hardwoods in a stand. Percent cover, also referred to as density, is a quantitative estimate of the aerial extent of the living plants for each vegetation layer within a stand. Cover is the primary metric used to quantify the importance or abundance of a life form and/or species.
Description source
http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=187919
List of values
Value 1
Description >0-1%


Value 2
Description >1-5%


Value 3
Description >5-15%


Value 4
Description >15-25%


Value 5
Description >25-50%


Value 6
Description >50-75%


Value 7
Description >75-100%


Value 9
Description Not Applicable/Not Assigned


Value 0
Description None or Not Observable


HideFieldHdwdCov


Field YUBRCov
* Alias JoshuaTreeCover
* Data type String
* Width 50
* Precision 0
* Scale 0
Field description
An estimate of the total percent cover of Joshua trees (Yucca brevifolia) in a stand. Percent cover, also referred to as density, is a quantitative estimate of the aerial extent of the living plants for each vegetation layer within a stand. Cover is the primary metric used to quantify the importance or abundance of a life form and/or species.
Description source
http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=187919
List of values
Value 0
Description None or Not Observable


Value 1
Description >0-1%


Value 2
Description >1-5%


Value 3
Description >5%


Value 9
Description Not Applicable/Not Assigned


HideFieldYUBRCov


Field TreeCov
* Alias TotalTreeCover
* Data type String
* Width 50
* Precision 0
* Scale 0
Field description
An estimate of the total percent cover of trees in a stand. Percent cover, also referred to as density, is a quantitative estimate of the aerial extent of the living plants for each vegetation layer within a stand. Cover is the primary metric used to quantify the importance or abundance of a life form and/or species.
Description source
http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=187919
List of values
Value 1
Description >0-1%


Value 2
Description >1-5%


Value 3
Description >5-15%


Value 4
Description >15-25%


Value 5
Description >25-50%


Value 6
Description >50-75%


Value 7
Description >75-100%


Value 9
Description Not Applicable/Not Assigned


Value 0
Description None or Not Observable


HideFieldTreeCov


Field ShrubCov
* Alias ShrubCover
* Data type String
* Width 50
* Precision 0
* Scale 0
Field description
An estimate of the total percent cover of shrubs in a stand. Percent cover, also referred to as density, is a quantitative estimate of the aerial extent of the living plants for each vegetation layer within a stand. Cover is the primary metric used to quantify the importance or abundance of a life form and/or species.
Description source
http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=187919
List of values
Value 1
Description >0-1%


Value 2
Description >1-5%


Value 3
Description >5-15%


Value 4
Description >15-25%


Value 5
Description >25-50%


Value 6
Description >50-75%


Value 7
Description >75-100%


Value 9
Description Not Applicable/Not Assigned


Value 0
Description None or Not Observable


HideFieldShrubCov


Field HerbCov
* Alias HerbaceousCover
* Data type String
* Width 50
* Precision 0
* Scale 0
Field description
An estimate of the total percent cover of herbaceous species in a stand. Percent cover, also referred to as density, is a quantitative estimate of the aerial extent of the living plants for each vegetation layer within a stand. Cover is the primary metric used to quantify the importance or abundance of a life form and/or species.
Description source
http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=187919
List of values
Value 1
Description 0-2%


Value 2
Description >2-15%


Value 3
Description >15-40%


Value 4
Description >40-100%


Value 9
Description Not Applicable/Not Assigned


HideFieldHerbCov


Field Exotics
* Alias Exotics
* Data type String
* Width 50
* Precision 0
* Scale 0
Field description
A code reflecting the level of impact by exotic invasive species such as Mediterranean grass (Schismus spp.) or tamarisk (Tamarix spp.).Polygons were not created or split because of differences in the presence of exotics.
Description source
http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=187919
List of values
Value 0
Description None/Not Observable


Value 1
Description Low


Value 2
Description Moderate


Value 3
Description High


Value 9
Description Not Applicable/Not Assigned


HideFieldExotics


Field Roadedness
* Alias Roadedness
* Data type String
* Width 50
* Precision 0
* Scale 0
Field description
The Roadedness Disturbance code reflects the combination of the amount of roads in the polygon and the roads effect on the contiguous space that has no roads that is, where the roads fall within the polygon. This definition of roadedness has the advantage of helping to identify roadless areas, but the disadvantage of being scale independent. For example, any polygon with a road more or less bisecting it will be assigned a code of Moderate, regardless of size. This means that a very large polygon with a Moderate Roadedness Disturbance code might still contain an extensive roadless area.
Description source
http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=187919
List of values
Value 0
Description None/Not Observable


Value 1
Description Low


Value 2
Description Moderate


Value 3
Description High


Value 9
Description Not Applicable/Not Assigned


HideFieldRoadedness


Field Development
* Alias Development
* Data type String
* Width 50
* Precision 0
* Scale 0
Field description
Development Disturbance accounts for the level of impact by structures and settlements that are smaller than the MMU criteria for land use. Structures may include buildings, tanks, trailers, metal electrical towers, communication towers, and utility and mining structures. This attribute includes paved parking lots and collapsed structures. Note that it also includes debris such as junked vehicles, major trash dumping, etc., the removal of which could result in a vegetation stand that could be in very good to pristine ecological condition. Disturbance that does not involve these types of features is accounted for in Anthropogenically Altered Disturbance.
Description source
http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=187919
List of values
Value 0
Description None/Not Observable


Value 1
Description Low


Value 2
Description Moderate


Value 3
Description High


Value 9
Description Not Applicable/Not Assigned


HideFieldDevelopment


Field AnthroAlt
* Alias AnthropogenicAlteration
* Data type String
* Width 50
* Precision 0
* Scale 0
Field description
This indicates the level of impact on vegetation through tillage, scraping, grazing, mining, etc. Disturbance from structures, pavement, or debris is not included here but is addressed in Development Disturbance. Anthropogenically Altered Disturbance captures past disturbances in the landscape that are still visible through their impact on vegetation, but do not have enough of an impact to change the vegetation type or percent cover range.
Description source
http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=187919
List of values
Value 0
Description None/Not Observed


Value 1
Description Low


Value 2
Description Moderate


Value 3
Description High


Value 9
Description Not Applicable/Not Assigned


HideFieldAnthroAlt


Field HydroMod
* Alias HydroModifier
* Data type String
* Width 50
* Precision 0
* Scale 0
Field description
This attribute denotes where a wash or sheet flow has been diverted from its natural path by restricted sheet flow or active channel flow crossing under a road, railroad, berm, etc., resulting in a vegetation difference downslope. The effect must create a boundary-forming break in vegetation type, shrub cover, tree cover, or herbaceous cover along the impediment. The modifier is only attributed to the polygon downslope of the impediment. The upslope portion on the polygon boundary must at least in part follow the hydrologic impediment. Drainage ditches conveying flow off the side of a road (though often visible on imagery) are not considered unless they make a boundary-forming break in the vegetation.
Description source
http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=187919
List of values
Value 0
Description Not Affected


Value 1
Description Affected


Value 9
Description Not Applicable/Not Assigned


HideFieldHydroMod


Field Notes
* Alias Notes
* Data type String
* Width 254
* Precision 0
* Scale 0
Field description
Text field for additional information.
HideFieldNotes


Field LandUse
* Alias LandUse
* Data type String
* Width 50
* Precision 0
* Scale 0
Field description
Land use is the human use of the land and is embodied through such features as urban centers, towns, mining, agriculture, and individual settlements. In this mapping effort land use was represented both as a possible vegetation class and as a separate attribute of a vegetated polygon. Every attempt was made to correlate the coding within both layers.
Description source
http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=187919
List of values
Value 0
Description Not Assigned/Not Assessed


Value 1000
Description Urban


Value 1436
Description Water Transfer


Value 2100
Description Non-woody Row & Field Crops


Value 2200
Description Orchards & Vineyards


Value 9800
Description Undifferentiated Water


Value 9810
Description Water Impoundment Feature


Value 1850
Description Wildlife Preserves & Sanctuaries


Value 2000
Description Agriculture (Includes Nurseries)


Value 2300
Description Improved Pastureland (Irrigated)


Value 3500
Description Vacant Land- Restoration


HideFieldLandUse


Field MethodID
* Alias MethodID
* Data type String
* Width 50
* Precision 0
* Scale 0
Field description
This attribute was used to indicate how the MapUnit coding decision was reached for a polygon by identifying what type of field data (if any) was used to support the vegetation type assignment. For polygons that did not have any corresponding point data, the value of photo interpretation was assigned. The Method ID attribute facilitated the accuracy assessment sample allocation process, as polygons that had reliable field information for type assignment could be identified and omitted from the final allocation.
Description source
http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=187919
List of values
Value 1
Description Rapid Assessment (current project)


Value 2
Description Releve


Value 3
Description Field Verification


Value 4
Description Photo Interpretation


Value 5
Description Adjacent Stand Information or Ground Photo


Value 6
Description Reconnaissance (current project)


Value 7
Description Other Information


Value 8
Description Older Plot Data


Value 9
Description Older Recon Data


Value 10
Description Accuracy Assessment


Value 60
Description Additional Recon Information


HideFieldMethodID


Field OLTE_PAFL
* Alias OLTE_PAFL
* Data type String
* Width 50
* Precision 0
* Scale 0
Field description
This attribute denotes the consistent presence of ironwood (Olneya tesota) and/or blue palo verde (Parkinsonia florida) in mapped polygons within the study area, the only occurrence of which is in the Colorado Desert region of the Sonoran Desert. The modifier was added to represent the vast expanses of sparse ironwood and/or blue palo verde emerging from the Direction of flow41 canopy of creosote bush, white bursage, and brittle bush shrub types on broad alluvial fans and bajadas, as well as sparsely vegetated desert pavement dissected by small rivulets, where the vegetation type was not assigned to the Parkinsonia florida-Olneya tesota Alliance.
Description source
http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=187919
List of values
Value 0
Description Not Visible or Not Consistent in Stand


Value 1
Description Present in At Least Trace Amounts and Consistent Throughout Most of the Stand


HideFieldOLTE_PAFL


Field Acres
* Alias Acres
* Data type Double
* Width 8
* Precision 0
* Scale 0
Field description
GIS-calculated area measurements of each mapped polygon.
HideFieldAcres


Field CalVegName
* Alias CalVegName
* Data type String
* Width 255
* Precision 0
* Scale 0
Field description
A crosswalk to the CalVeg vegetation system. Note that there may be a one-to-many relationship between CalVeg and NVCS.
Description source
http://www.fs.usda.gov/detail/r5/landmanagement/resourcemanagement/?cid=stelprdb5347192
HideFieldCalVegName


Field CalVegCode
* Alias CalVegCode
* Data type String
* Width 255
* Precision 0
* Scale 0
Field description
A crosswalk to the CalVeg vegetation system. Note that there may be a one-to-many relationship between CalVeg and NVCS.
Description source
http://www.fs.usda.gov/detail/r5/landmanagement/resourcemanagement/?cid=stelprdb5347192
HideFieldCalVegCode


Field CWHRType
* Alias CWHRType
* Data type String
* Width 255
* Precision 0
* Scale 0
Field description
A crosswalk to the California Wildlife Habitat Relationships system. Note that there is usually a one-to-many relationship between CWHR and NVCS.
Description source
https://wildlife.ca.gov/Data/CWHR
HideFieldCWHRType


Field CWHRCode
* Alias CWHRCode
* Data type String
* Width 255
* Precision 0
* Scale 0
Field description
A crosswalk to the California Wildlife Habitat Relationships system. Note that there is usually a one-to-many relationship between CWHR and NVCS.
Description source
https://wildlife.ca.gov/Data/CWHR
HideFieldCWHRCode


Field GlobalRank
* Alias GlobalRank
* Data type String
* Width 255
* Precision 0
* Scale 0
Field description
The global rarity ranking of the plant community mapped. Ranks are based on a set of criteria including the rarity of the community (extent and occupancy), the threats that the community is subject to, and any known trends in the quality, size, or quantity of stands. Ranks go from G1 which is critically imperiled/has very few occurrences to G5, when a community is demonstrably secure due to security globally. Ranks G1-G3 are considered rare. See:
Description source
http://www.natureserve.org/sites/default/files/publications/files/natureserveconservationstatusmethodology_jun12_0.pdf
HideFieldGlobalRank


Field StateRank
* Alias StateRank
* Data type String
* Width 255
* Precision 0
* Scale 0
Field description
The state rarity ranking of the plant community mapped (ranks are available for all California alliances, and some associations). Ranks are based on a set of criteria including the rarity of the community (extent and occupancy), the threats that the community is subject to, and any known trends in the quality, size, or quantity of stands within the state. Ranks go from S1 which is most imperiled/has very few occurrences to S5, when a community is demonstrably secure due to security statewide. Ranks S1-S3 are considered rare. See (subnational): http://www.natureserve.org/sites/default/files/publications/files/natureserveconservationstatusmethodology_jun12_0.pdf
Description source
NatureServe
HideFieldStateRank


Field Rare
* Alias Rare
* Data type String
* Width 255
* Precision 0
* Scale 0
Field description
Describes whether or not the vegetation type is rare. Alliances and associations with state ranks of S1-S3 are considered rare.
Description source
https://www.wildlife.ca.gov/Data/VegCAMP/Natural-Communities/Background
HideFieldRare


Field CaCode
* Alias CaCode
* Data type String
* Width 255
* Precision 0
* Scale 0
Field description
California Natural Community Codes - unique code assigned to alliances and associations.
Description source
https://www.wildlife.ca.gov/Data/VegCAMP/Natural-Communities
HideFieldCaCode


Field NVCSAlliance
* Alias NVCSAlliance
* Data type String
* Width 255
* Precision 0
* Scale 0
Field description
The standardized name for the alliance within the 2008 National Vegetation Classification System.
Description source
http://usnvc.org/
HideFieldNVCSAlliance


Field NVCSGroup
* Alias NVCSGroup
* Data type String
* Width 255
* Precision 0
* Scale 0
Field description
The standardized name for the group within the 2008 National Vegetation Classification System.
Description source
http://usnvc.org/
HideFieldNVCSGroup


Field NVCSMG
* Alias NVCSMG
* Data type String
* Width 255
* Precision 0
* Scale 0
Field description
The standardized name for the macrogroup within the 2008 National Vegetation Classification System.
Description source
http://usnvc.org/
HideFieldNVCSMG


Field Shape_Length
* Alias Shape_Length
* Data type Double
* Width 8
* Precision 0
* Scale 0
* Field description
Length of feature in internal units.
* Description source
Esri
* Description of values
Positive real numbers that are automatically generated.


HideFieldShape_Length


Field Shape_Area
* Alias Shape_Area
* Data type Double
* Width 8
* Precision 0
* Scale 0
* Field description
Area of feature in internal units squared.
* Description source
Esri
* Description of values
Positive real numbers that are automatically generated.


HideFieldShape_Area


HideDetails for objectds2874


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Metadata Details

* Metadata language English(UNITED STATES)


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


* Last update 2022-01-28


ArcGIS metadata properties
Metadata format ArcGIS1.0
Metadata style FGDC CSDGM Metadata
Standard or profile used to edit metadata FGDC


Created in ArcGIS for the item 2022-01-2808:53:23
Last modified in ArcGIS for the item 2022-01-2808:53:09


Automatic updates
Have been performed Yes
Last update 2022-01-2808:53:09


HideMetadata Details

Metadata Contacts

Metadata contact
Individual's name Debbie Johnson
Organization's name Aerial Information Systems, Inc.
Contact's position General Manager
Contact's role originator


Contact information


Metadata contact
Individual's name Christina Lund
Organization's name Bureau of Land Management
Contact's role owner


Contact information


Metadata contact
Individual's name Rosie Yacoub
Organization's name CDFW Vegetation Classification and Mapping Program
Contact's position GIS Analyst
Contact's role point of contact


Contact information


HideMetadata Contacts

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