Vegetation Classification and Mapping Program (VegCAMP), Biogeographic Data Branch, California Department of Fish and Game 20111205 vector digital data https://filelib.wildlife.ca.gov/Public/BDB/GIS/BIOS/Public_Datasets/200_299/ds292.zip https://www.wildlife.ca.gov/Data/BIOS Vegetation and land use are mapped for the approximately 725,000 acres constituting the Legal Delta portion of the Sacramento and San Joaquin River Delta area. Vegetation mapping is to sub-alliance to super-alliance level (based on the National Vegetation Classification Standard, see http://biology.usgs.gov/npsveg/nvcs.html ); land use is mapped to Anderson Level 2 classification ( see http://landcover.usgs.gov/pdf/anderson.pdf ). The map classification is based on a vegetation classification derived from field data collected in summer and fall of 2005 produced by the Vegetation Classification and Mapping Program of the Department of Fish and Game. The 2002 Stockton, Sacramento, and Delta High Resolution (1-foot) Orthoimagery and 2005 NAIP (1-meter) orthoimagery served as the base. Natural vegetation comprises approximately 17 percent of the Delta study area, 65 percent is agriculture and pasture, 10 percent is urban/other and 8 percent is open water. For use in assessing existing vegetation and land use conditions in the Delta and to serve as a baseline for monitoring future change. A complete report is available at: http://www.nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=18211 20020101 20050101 ground condition Complete None planned -121.899008 -121.195494 38.596079 37.616174 ISO 19115 Topic Category biota environment farming None Vegetation National Vegetation Classification Standard California Wildlife Habitat Relationships Habitat None Sacramento - San Joaquin Delta Legal Delta Contra Costa County Solano County California Delta Sacramento County San Joaquin County Yolo County Alameda County None 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.Recognition that this dataset was created by Aerial Information Systems, Inc. for the California Department of Fish and Game. We would also appreciate corrections to the map sent to VegCAMP. California Department of Fish and Game Diana Hickson Senior Biologist (Botany) mailing and physical

Biogeographic Data Branch

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Sacramento CA 95814 US (916) 327-5956 (916) 324-0475 dhickson@dfg.ca.gov 8:00-5:00pm Biogeographic Data Branch, California Department of Fish and Game VegCAMP (Vegetation Classification and Mapping Program) Vegetation Classification and Mapping Program Lead mailing and physical

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Sacramento CA 95811 (916) 324-9765 VegCAMP@wildlife.ca.gov Biogeographic Data Branch, California Department of Fish and Game VegCAMP (Vegetation Classification and Mapping Program) Vegetation Classification and Mapping Program Lead mailing and physical

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Sacramento CA 95811 (916) 324-9765 VegCAMP@wildlife.ca.gov Aerial Information Systems, Inc. for California Department of Fish and Game, Vegetation Classification and Mapping Program. Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9270 Map accuracy is detailed in the report, "Sacramento-San Joaquin River Delta Vegetation and Land Use Classification and Map." 2007. Vegetation Classification and Mapping Program, Biogeographic Data Branch California Department of Fish and Game, Sacramento. In general, overall accuracy of the polygons assessed was 88.7%, while the average accuracy of 59 map classes tested for accuracy was 83.3%. 48 types met or exceeded 80% accuracy; 2 types were between 70 and 80% accurate, and 9 types fell below 70% accuracy. The nine types were: Juglans californica, Baccharis pilularis/annual grasses-herbs, Rosa californica, Cornus sericea, Crypsis, Polygonum spp. - mixed forbs, algae, and Eucalyptus. Low accuracy for algae may be due to the time beween the imagery and field work to assess accuracy. Vegetation type attribution may be more accurate in the area covered by the 1-foot GSD (2002) orthoimagery than in the area covered by the 1-meter GSD (2005). Similarly, "attribution resolution" may be greater in the area covered by the 2002 imagery, that is, the photointerpreters may have been able to attribute to a finer scale (association level vs. alliance or super-alliance level) with the higher resolution imagery. However, VegCAMP did not test these differences in the map accuracy assessment. Additionally, vegetation type and cover may have changed between the imagery and map publication dates. Polygons were delineated using heads-up digitizing via ArcINFO onto the Stockton, Delta, and Sacramento High Resolution Orthoimagery flown at 1-foot ground sample distance (GSD) rectified to National Mapping Standards at 1:12,000 scale for most of the mapping area, and onto National Agricultural Imagery Program (NAIP) imagery flown at a one meter GSD and rectified to the national standards at 1:24,000 scale for the balance of the mapping area (areas not covered by the higher resolution imagery). The following are the minimum mapping units (MMU) and minimum widths (MW) for the project: Land use: 2 acres MMU/25 meters MW Isolated land use: 1 acre MMU/ 10 meters MW Water: 1 acre MMU/10 meters MW Vegetation: 2 acres MMU/10 meters MW Critical vegetation types such as isolated wetlands: 1 acre MMU/10 meters MW Features were occasionally mapped below MMU or minimum width. These features were so distinct or important compared to the surroundings that omitting them would have distorted the representation of the area. Mapping Criteria Land/Water Interface Tidal fluctuations in the Delta and the gradations of signature between "open water" and "upland" necessitated guidelines for delineating the land/water interface: The following conditions were mapped as land: -Upland vegetation, agriculture, urban and vacant areas -Tidal & seasonally flooded mudflats exposed at the time of the imagery -Emergent vegetation (Temporarily to permanently flooded) - including areas that are normally designed for water such as channels & canals These conditions were mapped as water: -Open water as depicted on the baseline imagery -Submerged mudflats at the time the imagery was flown -Flooded areas as a result of levee breakage Floating & submerged (fixed or non fixed rooted) aquatic vegetation were the only types of vegetation mapped in what was coded as water in the land use layer. Occasionally these transitional elements were mapped in the opposite category (e.g., wet mudflats included with land) if doing so allowed linking below-resolution patches into a unit big enough to map. In the cases of tree canopy overhanging the shoreline, the land/water boundary was placed at the presumed location of the tree trunks. Shorelines on small islands may have been expanded outward slightly to meet MMU requirements. Streams Streams that appeared as polygons on the USGS 1:24,000 topographic maps were mapped as water polygons, even if their width tapered to less than 10 meters on the imagery. Canals/Ditches Canals and ditches were mapped as water polygons if the width of the water signature itself was greater than or equal to 10 meters, and that width continued for the majority of the length of the feature. If the width decreased to consistently less than 10 meters, a good visual break (bend, road crossing, etc.) was selected to end the water polygon. Canals and ditches were not delineated as polygons where the width of the water signature was less than 10 meters, even if the berm-to-berm width was greater than 10 meters. A corridor consisting of two or more narrow (<10 meter) ditches and measuring more than 25 meters wide overall was mapped in land use as a Transportation, Communications, and Utilities polygon. Such a polygon was also mapped if the disturbance alongside a single narrow canal or ditch measured 25 meters or more in width. The delineations were made on the outside edges of the disturbance on either side of the corridor. The water in the canals or ditches was not pulled out separately. If the corridor of "ditch/canal-related disturbance" measured less than 25 meters in width, the corridor was not mapped. In ditch corridors as described above, occasionally the water in a ditch widened to 10 meters or more. For continuity, the entire length of the corridor was mapped as a Transportation, Communication, and Utilities polygon. The water was not pulled out separately. Linear Vegetation Features Natural vegetation often occurred along narrow canals and ditches. The total width between the outside edges of the vegetation on either side of the feature sometimes exceeded 10 meters. In these situations, a vegetation polygon was drafted only if the vegetation on one side of the ditch bank was wider than 10 meters, and the entire polygon was larger than one acre. Such a polygon would include vegetation on both sides of the ditch. A vegetation polygon was not pulled out if the vegetation on each bank measured less than 10 meters wide. Windrows were not mapped unless the width of the canopy met or exceeded 10 meters. Trees flanking either side of a narrow road or stream were collected as one vegetation polygon where the canopy width met or exceeded 10 meters. Although normally road centerlines were used to separate land use types, exceptions sometimes occurred where trees were involved. For instance, there were cases where a large area of trees occurred on one side of a road, and a narrow (<10 meter) strip of trees occurred on the other side of the road, which was in turn flanked by cropland. Rather than using the road to separate the natural vegetation from the cropland, the delineation was made on the tree/cropland interface. Land Use Boundaries Fence lines or the centerlines of roads, streams, ditches, etc. were used to separate adjacent land use types. Where these features weren't present, land use boundaries were drawn with consideration for polygons in the vegetation layer. Boundaries were drawn to avoid sliver polygons created when the land use and vegetation layers were superimposed. Conversely, some vegetation boundaries had straight portions due to land use delineations. Cropland and Pasture One challenge in land use mapping was to differentiate between fallow cropland, pasture, and vacant land in agricultural areas. Cropland and pasture were assigned land use code 2100, while vacant land received a code of 3100. The land use data from DWR and from San Joaquin County, as well as field observations, helped in separating these classes. A field was considered to be fallow cropland if it occurred in close proximity to active agriculture and had weeds and grasses growing, but also showed some evidence of recent agricultural activity. Similar fields sometimes occurred on the fringe of in-crop areas. If these fields had shrubs and tall weeds growing, they probably had not been farmed for more than five years. These fields were mapped as vacant. Livestock, fences, watering holes, barns, and other features were used to distinguish pasture. These may have been visible on the imagery or during the field check. If there weren't clear signs of pasture use, the land was mapped as vacant. Even with these rules, the best code for land that was not clearly in agricultural use was sometimes ambiguous. Fields extending more than 70 acres without being divided by fences, paths, etc. were generally coded as vacant. Rice At the outset of the project, the possibility of mapping rice as a separate agricultural class was investigated. This turned out not to be viable, as the signature of rice fields in the Delta region was too variable to map reliably. However, a class corresponding to Flooded Agriculture was added to the land use classification. Some of the polygons with this code may include rice. Orchards Active and recently abandoned orchards were mapped as orchards in land use. Long-abandoned orchards, with trees still standing or with trees removed, were collected as vacant land use. Transportation Corridor This land use class (code = 1410) was reserved for freeways and for city streets that exceeded 25 meters in width. Median vegetation was not pulled out separately. The delineations followed a visible right of way indicator (such as fence line) where present. Otherwise they followed the edge of the paved surface for freeways, or the bottom of the curb for city streets. On-ramps and off-ramps were not included. Aerial Information Systems, Inc. Ver 1 vector digital data 24000 None 20050101 20020101 ground condition AIS. 2006. Final data quality check by VegCAMP, January 2007 to correct missing records in Nat Veg field. Biogeographic Data Branch Diana Hickson Senior Biologist (Botany) 916 327-5956 916 324-0475 dhickson@dfg.ca.gov 8-5 Correction to rare vegetation types in Antioch Dunes NWR area by VegCAMP. Final corrections to attribute values to fix inconsistencies between vegetation types, land uses, and WHR types. Per the data contributor, DFG's Aicha Ougzin, a new field schema was added to the latest version. This was to help crosswalk this dataset to other datasets. MAPUNIT is equal to the Vegetation Type referred to in the final report associated with this mapping classification. In addition, HEIGHT was replaced with HGTCLASS, WHRSIZE was replaced with SIZECLASS, WHR was replaced with CWHRTYPE, and WHRCODE was replaced with CWHRCODE. No other changes have been made. 20111205 California Department of Fish and Game Sophie Klenner sklenner@dfg.ca.gov Vector GT-polygon composed of chains 25638 NAD 1983 California Teale Albers 34.0 40.5 -120.0 0.0 0.0 -4000000.0 coordinate pair 0.0001 0.0001 meter D North American 1983 GRS 1980 6378137.0 298.257222101 ds292 OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. DELTAV_ID Unique Polygon Identifier VEG Code for vegetation type 1300 Temporarily or Seasonally Flooded - Deciduous Forests 1320 White Alder (Alnus rhombifolia) 1321 Alnus rhombifolia / Salix exigua (Rosa californica) 1322 Alnus rhombifolia / Cornus sericea 1330 Oregon Ash (Fraxinus latifolia) 1340 Box Elder (Acer negundo) 1341 Acer negundo - Salix gooddingii 1350 Hinds walnut (Juglans X hindsii) 1360 Fremont Cottonwood (Populus fremontii) 1370 California Sycamore (Platanus racemosa) 1380 Black Willow (Salix gooddingii) 1381 Salix gooddingii / Wetland Herbs 1382 Salix gooddingii - Populus fremontii - (Quercus lobata-Salix exigua-Rubus discolor) 1383 Salix gooddingii - Quercus lobata / Wetland Herbs 1384 Salix gooddingii / Rubus discolor 2100 Sclerophyllous Woodlands 2110 Coast Live Oak (Quercus agrifolia) 2200 Deciduous Woodlands 2230 Valley Oak (Quercus lobata) 2231 Quercus lobata / Rosa californica (Rubus discolor - Salix lasiolepis / Carex spp.) 2232 Quercus lobata - Acer negundo 2233 Quercus lobata - Alnus rhombifolia (Salix lasiolepis - Populus fremontii - Quercus agrifolia) 2234 Quercus lobata - Fraxinus latifolia 3000 SHRUBLANDS 3200 Microphyllous Shrubland 3210 Coyotebush (Baccharis pilularis) 3211 Baccharis pilularis / Annual Grasses & Herbs 3300 Dwarf Shrublands 3310 Deerweed (Lotus scoparius) 3311 Lotus scoparius - Antioch Dunes 3400 Intermittently or Temporarily Flooded Deciduous Shrublands 3410 Blackberry (Rubus discolor) 3420 California Wild Rose (Rosa californica) 3430 Mexican Elderberry (Sambucus mexicana) 3440 California Dogwood (Cornus sericea) 3441 Cornus sericea - Salix exigua 3442 Cornus sericea - Salix lasiolepis / (Phragmites australis) 3450 Buttonbush (Cephalanthus occidentalis) 3460 Arroyo Willow (Salix lasiolepis) 3461 Salix lasiolepis - Mixed brambles (Rosa californica - Vitis californica - Rubus discolor) 3462 Salix lasiolepis - (Cornus sericea) / Scirpus spp.- (Phragmites australis - Typha spp.) complex unit 3470 Shining Willow (Salix lucida) 3480 Narrow-leaf Willow (Salix exigua) 3481 Salix exigua - (Salix lasiolepis - Rubus discolor - Rosa californica) 3500 Broadleaf Shrublands 3510 Silver Lupine (Lupinus albifrons) 3511 Lupinus albifrons - Antioch Dunes 4000 HERBACEOUS GRASSES 4110 Pampas Grass (Cortaderia selloana - C. jubata) 4200 Intermittently Flooded Grasslands 4210 Saltgrass (Distichlis spicata) 4211 Distichlis spicata - Annual Grasses 4212 Distichlis spicata - Salicornia virginica 4213 Distichlis spicata - Juncus balticus 4220 Santa Barbara Sedge (Carex barbarae) Stands 4300 Temporarily Flooded Grasslands 4310 Giant Cane (Arundo donax) 4320 Creeping Wild Rye Grass (Leymus triticoides) 4340 Broad-leaf Cattail (Typha latifolia) 4400 Seasonally Flooded Grasslands 4401 Juncus bufonius (salt grasses) 4402 Vernal Pools 4403 Juncus balticus - meadow vegetation 4500 Semi-permanently Flooded Grasslands 4501 Mixed Scirpus Mapping Unit 4502 Mixed Scirpus / Floating Aquatics (Hydrocotyle - Eichhornia) Complex 4503 Mixed Scirpus / Submerged Aquatics (Egeria-Cabomba-Myriophyllum spp.) complex 4510 Hard-stem Bulrush (Scirpus acutus) 4511 Scirpus acutus Pure 4512 Scirpus acutus - Typha angustifolia 4513 Scirpus acutus -Typha latifolia 4514 Scirpus acutus - (Typha latifolia) - Phragmites australis 4515 Scirpus acutus - Xanthium strumarium 4520 California Bulrush (Scirpus californicus) 4521 Scirpus californicus - Eichhornia crassipes 4522 Scirpus californicus - Scirpus acutus 4530 American Bulrush (Scirpus americanus) 4600 Tidally Flooded Grasslands 4610 Narrow-leaf Cattail (Typha angustifolia) 4611 Typha angustifolia - Distichlis spicata 4620 California Hair-grass (Deschampsia caespitosa) 4621 Deschampsia caespitosa - Lilaeopsis masonii 4630 Common Reed (Phragmites australis) 4700 Tall & Medium Upland Grasses 4701 Ruderal Herbaceous Grasses & Forbs 4710 California Annual Grasslands - Herbaceous 4711 Bromus diandrus - Bromus hordeaceus 4720 Italian Rye-grass (Lolium multiflorum) 4721 Lolium multiflorum - Convolvulus arvensis 4722 Lolium multiflorum - Triphysaria eriantha 4723 Lolium multiflorum - Lasthenia glabrata 4724 Lolium multiflorum - Blennosperma nanum 4730 Rabbitsfoot grass (Polypogon maritimus) 5000 FORBS 5100 Tall & Medium Upland Forbs 5110 Fennel (Foeniculum vulgare) 5120 Poison Hemlock (Conium maculatum) 5200 Intermittently Flooded Perennial Forbs 5201 Managed Annual Wetland Vegetation (Non-specific grasses & forbs) 5202 Shallow flooding with minimal vegetation at time of photography 5203 Seasonally flooded undifferentiated annual grasses and forbs 5204 Managed alkali wetland (Crypsis) 5205 Intermittently or temporarily flooded undifferentiated annual grasses and forbs 5206 Scirpus spp. in managed wetlands 5210 Birdfoot Trefoil (Lotus corniculatus) 5300 Temporarily Flooded Perennial Forbs 5301 Smartweed Polygonum spp. - Mixed Forbs 5311 Polygonum amphibium 5400 Semi-permanently Flooded Forbs 5410 Floating Primrose (Ludwigia peploides) 5411 Ludwigia peploides 5420 Horsetail (Equisetum spp.) 5500 Tall & Medium Perennial Forbs (Upland or Tidally Flooded) 5501 Alkaline vegetation mapping unit 5502 Allenrolfea occidentalis mapping unit 5503 Suaeda moquinii - (Lasthenia californica) mapping unit 5504 Lasthenia californica mapping unit 5510 Alkali Heath (Frankenia salina) 5511 Frankenia salina - Distichlis spicata 5512 Frankenia salina - Annual Grasses 5520 Pickleweed (Salicornia virginica) 5521 Salicornia virginica - Distichlis spicata 5522 Salicornia virginica - Cotula coronopifolia 5530 Perennial Pepperweed (Lepidium latifolium) 5531 Lepidium latifolium - Salicornia virginica - Distichlis spicata 5540 Tobacco brush (Nicotiana glauca) mapping unit 6000 PERMANENTLY FLOODED HYDROMORPHIC-ROOTED 6101 Generic Floating Aquatics 6110 Water Hyacinth (Eichhornia crassipes) 6201 Pondweed (Potamogeton sp.) 6202 Riverweed (Ceratophyllum sp.) 6203 Waterweed (Elodea sp.) 6210 Milfoil - Waterweed (generic submerged aquatics) 6211 Brazilian Waterweed (Egeria - Myriophyllum) Submerged 6220 Hydrocotyle ranunculoides 6230 Sagittaria sanfordii 7000 Algae 9000 LAND USE - LITTLE OR NO VEGETATION - WATER 9100 Urban Developed - Built Up 9200 Agriculture 9300 Exotic Vegetation Stands 9310 Eucalyptus 9320 Tree-of-Heaven (Ailanthus altissima) 9330 Acacia - Robinia 9400 Sparsely or Unvegetated Areas; Abandoned orchards 9401 Levee Rock Riprap 9402 Salt scalds and associated sparse vegetation 9403 Tidal mudflats 9404 River blowout, sandy wash 9500 Restoration Sites 9501 Black Willow (Salix gooddingii) - Valley Oak (Quercus lobata) restoration 9502 Valley Oak (Quercus lobata) restoration 9503 White Alder (Alnus rhombifolia) - Arroyo willow (Salix lasiolepis) restoration 9800 Water 9999 Unknown LU Land Use Code 1000 Urban or Built-up Land 1100 Residential 1200 Commercial and Services 1271 Military - Built-up 1272 Military - Not Built-up 1300 Industrial 1400 Transportation, Communications, and Utilities 1410 Transportation Corridor 1500 Industrial and Commercial Complexes 1700 Other Urban or Built-up Land 2000 Agricultural Land 2100 Cropland and Pasture 2110 Flooded Agriculture 2200 Orchards, Groves, Vineyards, Nurseries, and Ornamental Horticultural Land 2210 Nurseries and Ornamental Horticultural Land 2220 Deciduous Orchards 2230 Evergreen Orchards 2240 Vineyards 2300 Confined Feeding Operations 2400 Other Agricultural Land 3000 Natural Vegetation 3100 Vacant 5000 Water 5100 Streams - Rivers 5200 Lakes, Reservoirs and Ponds 5300 Canals 5400 Areas of Inundation 7000 Barren Land 7500 Strip Mines, Quarries, and Gravel Pits 7600 Transitional Areas - Construction - Scraped Ground LUNAME Land Use per Anderson Level II classification NATURALVEG Natural Vegetation, Ag/Urban, or Open Water 1 Natural Vegetation 2 Human disturbance (agriculture/urban) 3 Open water DENSITY Vegetation cover 1 > 60% cover 2 40-60% cover 3 25-40% cover 4 10-25% cover 5 2-10% cover 0 No cover (such as open water or urban) CWHRCODE code assigned to the California Wildlife Habitat Relationships type http://www.dfg.ca.gov/biogeodata/cwhr/ HGTCLASS Code for height of dominant vegetation stratum 1 < 0.5 meter 2 0.5-2 meters 3 2-5 meters 4 5-15 meters 5 15-35 meters 6 > 35 meters 9 Not applicable 0 floating or submerged aquatics SIZECLASS CWHR size class (diameter breast height) http://www.dfg.ca.gov/biogeodata/cwhr/ 1 seedlings (<1") 2 saplings (1-6") 3 pole (6-11")) 4 small (11-25") 5 medium - large (>25") 6 multi-layered medium - large trees over smaller trees (>60% cover) 0 Unknown (used for unknown vegetation) 9 Not applicable HIGHVALUE High conservation value AIS. 2006. 0 Not denoted with high conservation value 1 Denoted with high conservation value PERIMETER Perimeter length in meters AREA_ Polygon area in square meters ACRES GIS calculated acres HECTARES GIS calculated hectares CACODE California Natural Community Codes - unique code assigned to alliances and associations NVCSLEVEL The level of the National Vegetation Classification System Hierarchy that the vegetation type corresponds to http://biology.usgs.gov/npsveg/nvcs.html CWHRTYPE crosswalk to the California Wildlife Habitat Relationship system http://www.dfg.ca.gov/biogeodata/cwhr/ NVCSNAME The standardized name of the vegetation description used in the National Classification System NVCSMG The standardized name for the macrogroup within the National Vegetation Classification System that the vegetation type corresponds to http://biology.usgs.gov/npsveg/nvcs.html GLOBALRANK The global rarity rank of the plant community mapped (only for alliances) G1 and S1: Fewer than 6 viable occurrences worldwide and/or 2000 acres; G2 and S2: 6-20 viable occurrences worldwide and/or 2000-10,000 acres; G3 and S3: 21-100 viable occurrences worldwide and/or 10,000-50,000 acres; G4 and S4: Greater than 100 viable occurrences worldwide and/or greater than 50,000; G5 and S5: Community demonstrably secure due to secure worldwide and statewide STATERANK The state rarity rank of the plant community mapped (only for alliances) G1 and S1: Fewer than 6 viable occurrences worldwide and/or 2000 acres; G2 and S2: 6-20 viable occurrences worldwide and/or 2000-10,000 acres; G3 and S3: 21-100 viable occurrences worldwide and/or 10,000-50,000 acres; G4 and S4: Greater than 100 viable occurrences worldwide and/or greater than 50,000; G5 and S5: Community demonstrably secure due to secure worldwide and statewide RARE Rarity of the vegetation type. Alliances and associations with state ranks of S1-S3 are considered rare. Y=Rare, N=Not Rare, U=Unknown Y Yes - Rare N No - Not Rare U Unknown CALVEGCODE a crosswalk to the CalVeg vegetation system CALVEGNAME a crosswalk to the CalVeg vegetation system MAPUNIT Vegetation type (alliance, assocation or mapping unit) per mapping classification UID Shape_Length Length of feature in internal units. ESRI Positive real numbers that are automatically generated. Shape_Area Area of feature in internal units squared. ESRI Positive real numbers that are automatically generated. Polygon attributes include Land Use (LU) based on Anderson Level II classification; Vegetation Type (VEG) based on a map classification derived from the vegetation classification that was derived from field sampling; a simple classification of whether the polygon is natural vegetation, agriculture/urban, or water (NATURALVEG); density (or cover) class (DENSITY) of the predominant vegetation layer (herb, shrub or tree); the California Wildlife Habitat Relationships class (WHR) as crosswalked from the mapping classification or land use classification; the modal height class of the predominant vegetation layer (HEIGHT); the CWHR size class/dbh (WHRSIZE) and whether the polygon has a high conservation value as habitat (HIGHVALUE). The land use definitions and descriptions were developed by Aerial Information Systems, Inc. as a Modified Anderson Land Use Classification. This classification uses a hierarchical system, allowing easy aggregation and disaggregation of classes for analysis or cartographic purposes. Levels are denoted by x000, xx00, and xx0x, e.g., 1000, 1200, 1271. Most uses are mapped to the second level, with some uses mapped to the third level. Similarly, vegetation types may be aggregated into greater levels of the hierarchy as denoted by x000, xx00, xxx0 (e.g., 5000, 5400, 5411, with xxxx being the finest scale, usually association level or mapping unit). For aggregation purposes, all levels of the hierarchy for both the Land Use and Vegetation fields are provided in this metadata, even though there may be no mapped polygons in the higher levels (e.g., 3000, shrublands), to provide GIS users with suggested aggregation schemes and names. Multiple coding of each polygon for both vegetation and land use allows flexibility in representing complex situations. Natural vegetation could be represented in areas mapped as "water" or "urban" in the other layers. For instance, water with large areas of floating aquatics may have been coded as "Water" in the land use layer but as Eichhornia crassipes (6110) in the vegetation layer. As another example, a park with a large stand of valley oaks could be coded as "Other Urban or Built-up Land" in land use but as Quercus lobata (2230) in vegetation. Areas of significant conservation value (HIGHVALUE) generally fell into three broad categories: 1) Riparian & wetland forests and woodlands including some gallery forests, 2) Tidally and non-tidally flooded marshlands and meadows including seasonally flooded vernal pools and alkali areas, 3) Associated upland annual grasslands generally as a connecting corridor to the above two categories. Criteria Used for determining HIGHVALUE: Total acreage: Generally, aggregations of polygons with natural cover over 15 - 20 acres were included in the assessment; except islands in large natural rivers where all polygon aggregations were included regardless of size. Area to perimeter ratios were factored in when evaluating narrow riparian zones or narrow natural vegetation strips along urban or agricultural interface. Canopy Density: Significance was assigned to denser canopies, especially when the openness of the canopy was due to disturbance related factors such as scraping or burns. Connectivity: Occasionally, less desirable polygons (such as annual herbaceous types) were included in the polygon aggregations to join special areas of concern that may have potential for restoration. Floristic Type: Valley oak gallery forests were given most priority, less natural types such as arroyo willow with mixed brambles were generally included in areas adjacent to more floristically significant stands which are of significant conservation value. Adjacent Land Use & Land Cover: Isolated stands within urban or agricultural areas or narrow strips along urban - agricultural interface were given less significance than areas surrounded by water or adjacent to natural vegetation. Stands adjacent to agriculture were given more significance than stands running through urban areas. Exotic & Invasive Vegetation: For the most part, these polygons were taken out of any aggregations, even if they represented a connection or corridor between significant stands. "Sacramento-San Joaquin River Delta Vegetation and Land Use Classification and Map." 2007. Vegetation Classification and Mapping Program, Biogeographic Data Branch California Department of Fish and Game, Sacramento. AND this report, attached as an appendix to the above report: "Vegetation and Land Use Mapping Sacramento & San Joaquin River Delta" 2006. Aerial Information Services, Inc. Biogeographic Data Branch, California Department of Fish and Game Diana Hickson Senior Biologist (Botany) mailing and physical

Biogeographic Data Branch

1807-13th Street Ste 202

Sacramento CA 95814 US 916 327-5956 9160 324-0475 dhickson@dfg.ca.gov 8-5 See access and use constraints information. None Contact BIOS Data Librarian, Kristina White, kwhite@dfg.ca.gov 1-2 weeks 20220324 California Department of Fish and Game Diana Hickson Senior Biologist (Botany) mailing and physical

Biogeographic Data Branch

1807 13th Street St 202

Sacramento CA 95814 US 916 327-5956 916 324-0475 dhickson@dfg.ca.gov 8-5 FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time