State of California The Resources Agency DEPARTMENT OF WATER RESOURCES STANDARD LAND USE LEGEND July 1993 (This legend is for land use surveys conducted in 1993 and after.) The minimum breakdown of land use is according to the class symbol. More detail is obtained by adding the subclass number to the class symbol, or by use of special condition symbols. Any or all of the following information can be delineated. 1. Types of agricultural, urban, or native land use. 2. Specific crops. 3. Multiple land use. 4. Sources of water supply. 5. Type of irrigation system. AGRICULTURAL CLASSES The vast majority of crops grown in California are irrigated. Unless preceded with an "n" if it is non-irrigated, all agricultural classes are considered irrigated. (This statement is for the agricultural classes and does not apply to the other non-agricultural classes of semiagricultural, urban, or native.) G - GRAIN AND HAY CROPS 1. Barley 3. Oats 2. Wheat 6. Miscellaneous and mixed grain and hay R - RICE F - FIELD CROPS 1. Cotton 7. Grain sorghum 2. Safflower 8. Sudan 3. Flax 9. Castor beans 4. Hops 10. Beans,dry (all types) 5. Sugar beets 11. Miscellaneous field 6. Corn (field & sweet) 12. Sunflowers P - PASTURE 1. Alfalfa & alfalfa mixtures 5. Induced high water 2. Clover table native pasture 3. Mixed pasture 6. Misc. grasses (normally grown for seed) 4. Native pasture 7. Turf farms T - TRUCK, NURSERY AND BERRY CROPS 1. Artichokes 14. Spinach 2. Asparagus 15. Tomatoes 3. Beans (green) 16. Flowers,nursery & 4. Cole crops (when further Christmas tree farms breakdown is not needed) 17. Mixed (four or more) 6. Carrots 18. Miscellaneous truck 7. Celery 19. Bushberries 8. Lettuce (all types) 20. Strawberries 9. Melons, squash, and cucumbers (all types) 21. Peppers (chili, bell,etc.) 10. Onions and garlic 22. Broccoli 11. Peas 23. Cabbage 12. Potatoes 24. Cauliflower 13. Sweet Potatoes 25. Brussels sprouts D - DECIDUOUS FRUITS AND NUTS 1. Apples 9. Figs 2. Apricots 10. Miscellaneous 3. Cherries deciduous 5. Peaches and nectarines 12. Almonds 6. Pears 13. Walnuts 7. Plums 14. Pistachios 8. Prunes C - CITRUS AND SUBTROPICAL 1. Grapefruit 7. Miscellaneous 2. Lemons subtropical fruits 3. Oranges 8. Kiwis 4. Dates 9. Jojoba 5. Avocados 10. Eucalyptus 6. Olives V - VINEYARDS 1. Table grapes 3. Raisin grapes 2. Wine grapes I - IDLE (precede with "n" in non-irrigated area) (Must include subclass) 1. Land cropped within the past three years but not cultivated at the time of survey. 2. New lands being prepared for crop production. SEMIAGRICULTURAL CLASS (Do not precede with "n") S - SEMIAGRICULTURAL & INCIDENTAL TO AGRICULTURE (Must include subclass) 1. Farmsteads 2. Livestock feed lots 3. Dairies 4. Poultry farms URBAN CLASSES (Do not precede with "n") U - URBAN - Residential, commercial, and industrial (May be used alone when further breakdown is not required) UR - RESIDENTIAL - Single and multiple family units, including trailer courts (May be used alone when further breakdown is not required) 1. Single family dwellings with lot sizes greater than 1 acre up to 5 acres. (ranchettes etc.) 2. Single family dwellings with a density of 1 unit/acre up to 8+ unit/acre. 3. Multiple family (apartments, condos, townhouses, barracks, bungalows, duplexes, etc.) 4. Trailer courts WATER USE FACTOR (% of total area irrigated - will be the second digit of UR Subclass when water factor is used) 1 0% to 25% area irrigated 2 26% to 50% area irrigated 3 51% to 75% area irrigated 4 76% or greater Example: UR32 Multiple family with water use factor of 26% to 50% of area irrigated. UC - COMMERCIAL (May be used alone when further breakdown is not required) 1. Offices, retailers, etc. 2. Hotels 3. Motels 4. Recreation vehicle parking & camp sites 5. Institutions (hospitals, prisons, reformatories, asylums, etc., having a reasonably constant 24-hour resident population) 6. Schools (yards to be mapped separately if large enough) 7. Municipal auditoriums, theaters, churches, buildings and stands associated with race tracks, football stadiums, baseball parks, rodeo arenas, amusement parks, etc. 8. Miscellaneous high water use (To be used to indicate a high water use condition not covered by the above categories.) UI - INDUSTRIAL (May be used alone when further breakdown is not required) 1. Manufacturing, assembling, and general processing 2. Extractive industries (oil fields, rock quarries, gravel pits,rock and gravel processing plants, etc.) 3. Storage and distribution (warehouses, substations, railroad marshalling yards, tank farms, etc.) 6. Saw mills 7. Oil refineries 8. Paper mills 9. Meat packing plants 10. Steel and aluminum mills 11. Fruit and vegetable canneries and general food processing 12. Miscellaneous high water use (To be used to indicate a high water use condition not covered by the above categories.) 13. Sewage treatment plant including ponds. 14. Waste accumulation sites (public dumps, sewage sludge sites, landfill and hazardous waste sites, etc..) 15. Wind farms, solar collectors farms, etc. UL - URBAN LANDSCAPE (May be used alone when further breakdown is not required) 1. Lawn area - irrigated 2. Golf course - irrigated 3. Ornamental landscape (excluding lawns) - irrigated 4. Cemeteries - irrigated 5. Cemeteries - not irrigated UV - VACANT (May be used alone when further breakdown is not required) 1. Unpaved areas (vacant lots, graveled surfaces, play yards, developable open lands within urban areas, etc.) 3. Railroad right of way. 4. Paved areas (parking lots, oiled surfaces, flood control channels, tennis court areas, auto sales lots, etc.) 6. Airport runways Example: UV4-K Paved urban vacant with a freeway special condition. (The paved portion of the freeway right of way.) NATIVE CLASSES (Do not precede with "n") NC - NATIVE CLASSES UNSEGREGATED ( May be used alone when further breakdown is not required) NV - NATIVE VEGETATION ( May be used alone when further breakdown is not required) 1. Grass land 2. Oak grass land 5. Heavy brush 3. Light brush 6. Brush and timber 4. Medium brush 7. Forest NR - RIPARIAN VEGETATION ( May be used alone when further breakdown is not required) 1. Marsh lands, tules and sedges 2. Natural high water table meadow 3. Trees, shrubs or other larger stream side or watercourse vegetation 4. Seasonal duck marsh, dry or only partially wet during summer 5. Permanent duck marsh, flooded during summer NW - WATER SURFACE - Lakes, reservoirs, rivers, canals, etc. NB - BARREN AND WASTELAND ( May be used alone when further breakdown is not required) 1. Dry stream channels 4. Salt flats 2. Mine Tailing 5. Sand dunes 3. Barren land UNCLASSIFIED NS - NOT SURVEYED Area within the investigation area that was not mapped. E - ENTRY DENIED Z - This area is outside of the study area. When any of the following special conditions, source of water, or type of irrigation is used a (-) should precede them. When more than one is used they should be used in the order stated above. SPECIAL CONDITIONS (only one can be used per parcel) (A) - ABANDONED ORCHARDS AND VINEYARDS Trees or vines must be in such a condition that renewal of cultural practices would restore economic production. Indicated by "A" following crop symbol. Example: D1-A Indicates an apple orchard previously irrigated but now abandoned. (B) - BURNED OVER AREAS Indicated by "B". The type and density of natural cover destroyed by fire is obtained by examination of aerial photo. Example: NV2-B (F) - FALLOW LANDS Must be disked or plowed at time of survey. (1) If no crop residue is apparent or identifiable then the "F" symbol will follow the agricultural class symbol for the crop most representative of those grown in the area. Example: T-F Fallow land within a truck crop area. (with facilities for irrigation) (2) If the crop residue is apparent and identifiable but is not from the current crop season covered by the survey then the field is considered fallow and mapped as the class of the crop residue. Example: Surveyor found an old sugar beet residue not from current season. Land would be mapped F-F. (3) However, if the crop residue is identifiable as that of a crop which was grown during the survey period, then map the field as though crop existed. Example: T6 - Carrot residue from current growing season. (K) - FREEWAYS Examples: UV-K Urban vacant, unsegregated, within the freeway right of way. UL3-K Urban landscape within the freeway right of way. (M) - MILITARY AREAS (Use only with the URBAN classes) Indicates land owned or controlled by the military and is used following the land use symbol. Example: UR3-M Multiple family dwellings within a military area. (R) - RECREATIONAL To be used with residential, commercial, vacant, R.V. parks and camp sites within primarily a seasonal recreational area. (S) - SEED CROP Indicates any crop grown for seed and is used following crop symbol. Example: P1-S Irrigated alfalfa seed crop. (T) - TILLED LANDS A field prepared for immediate planting, or just newly planted, including the appearance of seed lines or unidentifiable tiny seedlings. Example: T-T Tilled land in predominately a truck crop area. (X) - PARTIALLY IRRIGATED CROPS Crops irrigated for only part of their normal irrigation season. Example: P3-X Partially irrigated mixed pasture. (Y) - YOUNG NON-BEARING ORCHARDS AND VINEYARDS Follows crop symbol. Example: C3-Y Young non-bearing irrigated oranges. (Z) - RECLAMATION Land being leached for the removal of harmful salts. This symbol will be used following either the ~Idle~ symbol or symbols of crops grown as a step in the reclamation process. Examples: I2-Z, or R-Z MULTIPLE LAND USE INTERCROPPING Indicated by a fractional symbol. To be used with orchards or vineyards when intercropped with some other crop class, the orchard or vineyard symbol will appear in the numerator. Example: D12-Y/F10 young almonds intercropped with dry beans. DOUBLE CROPS First crop indicated by enclosed parenthesis. Examples: (G)F6 Irrigated grain followed by field corn. (T24)T8 Cauliflower followed by lettuce. TRIPLE CROPS First and second crop indicated by enclosed parenthesis. Example: (T8)(T23)T8 Irrigated lettuce followed by cabbage followed by lettuce. MIXED LAND USE Indicated by percentages following land use symbols. No more than 3 symbols are to be used in describing the area. (Use in increments of 10%) Example: D5 -40% Irrigated peaches 40% NV -20% Native vegetation 20% UR -40% Urban residential 40% TYPE OF IRRIGATION SYSTEM G - Gravity - Using a surface irrigation system, such as furrows, borders, gated pipe, etc. M - Micro - Including drip and micro-spray. S - Sprinkler - Including permanent and movable sprinkler systems. U - Unknown As part of the map symbols these irrigation type letters should include a circle around them so that they are not confused with the special condition letters. Example: P3- 1 G Irrigated pasture with stream as the water and gravity as the type of irrigation. SOURCE OF IRRIGATION WATER As part of the map symbols a circle should inclose each of the water source numbers. This symbol should be the last symbol in the land use code. Water Source code Surface water ------------------ 1 Mixed surface & ground water --- 2 Ground water ------------------- 3 Unknown source ----------------- 4 Example: P1- 3 Irrigated alfalfa with a well as water source. LEGEND REVISED 7/30/93 jb ADDENDUM : FILE STRUCTURE FOR .ATT FILES Structure for TYPE III file named Number of bytes per record : 67 Number of fields in record : 20 Date file was last updated : 3/28/95 Field Label Type Size/Dec. Offset 1 BL_X N 12 0 1 2 BL_Y N 12 0 13 3 ACRES N 13 3 25 4 WATERSOURC C 1 0 38 5 MULTIUSE C 1 0 39 6 CLASS1 C 2 0 40 7 SUBCLASS1 N 2 0 42 8 SPECOND1 C 1 0 44 9 IRR_TYP1 C 2 0 45 10 PCNT1 N 2 0 47 11 CLASS2 C 2 0 49 12 SUBCLASS2 N 2 0 51 13 SPECOND2 C 1 0 53 14 IRR_TYP2 C 2 0 54 15 PCNT2 N 2 0 56 16 CLASS3 C 2 0 58 17 SUBCLASS3 N 2 0 60 18 SPECOND3 C 1 0 62 19 IRR_TYP3 C 2 0 63 20 PCNT3 N 2 0 65 Record size in bytes = 67 The .DXF files have one and only one layer of lines each. Lines are of ACAD type LINE and POLYLINE only. There are no other drawing element types in the .DXF file. ADDENDUM : LIST OF COUNTIES AND STUDY NUMBERS, ABBREVIATIONS, AND NAMES FOR GRASS GIS COUNTY/ COUNTY/ STUDY ABBR. NAME STUDY ABBR. NAME NUMBER NUMBER 1 AL ALAMEDA 51 SU SUTTER 2 AP ALPINE 52 TE TEHEMA 3 AM AMADOR 53 TR TRINITY 4 BU BUTTE 54 TU TULARE 5 CA CALAVERAS 55 TO TOULUMNE 6 CO COLUSA 56 VE VENTURA 7 CC CONTRA COSTA 57 YO YOLO 8 DN DEL NORTE 58 YU YUBA 9 ED EL DORADO 59 10 FR FRESNO 60 DL DELTA 11 GL GLENN 61 US UPPER SANTA ANA 12 HU HUMBOLDT 62 13 IM IMPERIAL 63 14 IN INYO 64 15 KN KERN 65 16 KG KINGS 66 17 LK LAKE 67 18 LS LASSEN 68 19 LA LOS ANGELES 69 20 MA MADERA 70 21 MR MARIN 71 22 MP MARIPOSA 72 23 MD MENDOCINO 73 24 ME MERCED 74 25 MO MODOC 75 26 MN MONO 76 27 MT MONTEREY 77 28 NA NAPA 78 29 NE NEVADA 79 30 OR ORANGE 80 31 PL PLACER 81 32 PM PLUMAS 82 33 RI RIVERSIDE 83 34 SA SACRAMENTO 84 35 ST SAN BENITO 85 36 SR SAN BERNARDINO 86 37 SD SAN DIEGO 87 38 SF SAN FRANCISCO 88 39 SJ SAN JOAQUIN 89 40 SL SAN LUIS OBISPO 90 41 SM SAN MATEO 91 42 SB SANTA BARBARA 92 43 SC SANTA CLARA 93 44 SZ SANTA CRUZ 94 45 SH SHASTA 95 46 SI SIERRA 96 47 SK SISKIYOU 97 48 SO SOLANO 98 49 SN SONOMA 99 50 SS STANISLAUS For Problems or information contact: Steven L. Turner LLS State of California Department of Water Resources Division of Planning Geographic Information & Drafting Unit 1416 9th Street, Room 150 Sacramento, CA 95814 (916) 653-4041 (VOICE) (also 653-3020) (916) 657-4796 (FAX) stevet@water.ca.gov (E-mail)