20260515
11132600
1.0
FALSE
CA_358_4km_384x399_2025
002
-208000.000000
128000.000000
-2e+05
148000.000000
1
0.000
Projected
GCS_Sphere
Linear Unit: Meter (1.000000)
MM5_sphere
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20260515
09213800
20260515
09213800
150000000
5000
FGDC
Esri ArcGIS 13.3.0.52636
CA_358_4km-384x399_2025_Digesters
1
-122.945137
-119.064158
38.362148
35.151441
The spatial surrogate used to represent digesters on the California Air Resources Board's 4km^2 modeling domain for the year 2025.
<DIV STYLE="text-align:Left;">This surrogate is created to represent dairy digester activity. The surrogate was created using active facilities with digesters from the California Dairy and Livestock Database (CADD).</DIV>
California Dairy & Livestock Database (CADD) - https://ww2.arb.ca.gov/resources/documents/california-dairy-livestock-database-cadd, California Air Resources Board.
Digesters
Spatial Surrogate
4km
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>None. Please reference California Air Resources Board Modeling and Meteorology Branch.</SPAN></P></DIV></DIV></DIV>
Grid
Air Quality Modeling
File Geodatabase Feature Class
0.000
dataset
0
Simple
FALSE
0
TRUE
FALSE
CA_358_4km_384x399_2025
Feature Class
0
Spatial Surrogate
California Air Resources Board
OBJECTID
OBJECTID
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Shape
Geometry
0
0
0
Feature geometry.
Esri
Coordinates defining the features.
GAI
GAI
String
10
0
0
Geographic Area of Interest. Based on a combination of county, air basin, and air district.
06001
Alpine - Great Basin Valleys - Great Basin Unified Air Pollution Control District
California Air Resources Board
06002
Inyo - Great Basin Valleys - Great Basin Unified Air Pollution Control District
California Air Resources Board
06003
Mono - Great Basin Valleys - Great Basin Unified Air Pollution Control District
California Air Resources Board
06004
Lake - Lake County - Lake County Air Qaulity Management District
California Air Resources Board
06005
El Dorado - Lake Tahoe - El Dorado County Air Quality Management District
California Air Resources Board
06006
Placer - Lake Tahoe - Placer County Air Pollution Control District
California Air Resources Board
06007
Amador - Mountain Counties - Amador County Air Pollution Control District
California Air Resources Board
06008
Calaveras - Mountain Counties - Calaveras County Air Pollution Control District
California Air Resources Board
06009
El Dorado - Mountain Counties - El Dorado County Air Quality Management District
California Air Resources Board
06010
Mariposa - Mountain Counties - Mariposa County Air Pollution Control District
California Air Resources Board
06011
Nevada - Mountain Counties - Northern Sierra Air Quality Management District
California Air Resources Board
06012
Placer - Mountain Counties - Placer County Air Pollution Control District
California Air Resources Board
06013
Plumas - Mountain Counties - Northern Sierra Air Quality Management District
California Air Resources Board
06014
Sierra - Mountain Counties - Northern Sierra Air Quality Management District
California Air Resources Board
06015
Tuolumne - Mountain Counties - Tuolumne County Air Pollution Control District
California Air Resources Board
06016
Monterey - North Central Coast - Monterey Bay Air Resources District
California Air Resources Board
06017
San Benito - North Central Coast - Monterey Bay Air Resources District
California Air Resources Board
06018
Santa Cruz - North Central Coast - Monterey Bay Air Resources District
California Air Resources Board
06019
Del Norte - North Coast - North Coast Unified Air Quality Management District
California Air Resources Board
06020
Humboldt - North Coast - North Coast Unified Air Quality Management District
California Air Resources Board
06021
Mendocino - North Coast - Mendocino County Air Quality Management District
California Air Resources Board
06022
Sonoma - North Coast - Northern Sonoma County Air Pollution Control District
California Air Resources Board
06023
Trinity - North Coast - North Coast Unified Air Quality Management District
California Air Resources Board
06024
Lassen - Northeast Plateau - Lassen County Air Pollution Control District
California Air Resources Board
06025
Modoc - Northeast Plateau - Modoc County Air Pollution Control District
California Air Resources Board
06026
Siskiyou - Northeast Plateau - Siskiyou County Air Pollution Control District
California Air Resources Board
06027
Butte - Sacramento Valley - Butte County Air Quality Management District
California Air Resources Board
06028
Colusa - Sacramento Valley - Colusa County Air Pollution Control District
California Air Resources Board
06029
Glenn - Sacramento Valley - Glenn County Air Pollution Control District
California Air Resources Board
06030
Placer - Sacramento Valley - Placer County Air Pollution Control District
California Air Resources Board
06031
Sacramento - Sacramento Valley - Sacramento Metro Air Quality Management District
California Air Resources Board
06032
Shasta - Sacramento Valley - Shasta County Air Quality Management District
California Air Resources Board
06033
Solano - Sacramento Valley - Yolo/Solano Air Quality Management District
California Air Resources Board
06034
Sutter - Sacramento Valley - Feather River
California Air Resources Board
06035
Tehama - Sacramento Valley - Tehama County Air Pollution Control District
California Air Resources Board
06036
Yolo - Sacramento Valley - Yolo-Solano Air Quality Management District
California Air Resources Board
06037
Yuba - Sacramento Valley - Feather River Air Quality Management District
California Air Resources Board
06038
San Diego - San Diego County - San Diego County Air Pollution Control District
California Air Resources Board
06039
Alameda - San Francisco Bay Area - Bay Area Air Quality Management District
California Air Resources Board
06040
Contra Costa - San Francisco Bay Area - Bay Area Air Quality Management District
California Air Resources Board
06041
Marin - San Francisco Bay Area - Bay Area Air Quality Management District
California Air Resources Board
06042
Napa - San Francisco Bay Area - Bay Area Air Quality Management District
California Air Resources Board
06043
San Francisco - San Francisco Bay Area - Bay Area Air Quality Management District
California Air Resources Board
06044
San Mateo - San Francisco Bay Area - Bay Area Air Quality Management District
California Air Resources Board
06045
Santa Clara - San Francisco Bay Area - Bay Area Air Quality Management District
California Air Resources Board
06046
Solano - San Francisco Bay Area - Bay Area Air Quality Management District
California Air Resources Board
06047
Sonoma - San Francisco Bay Area - Bay Area Air Quality Management District
California Air Resources Board
06048
Fresno - San Joaquin Valley - San Joaquin Valley Air Pollution Control District
California Air Resources Board
06049
Kern - San Joaquin Valley - San Joaquin Valley Air Pollution Control District
California Air Resources Board
06050
Kings - San Joaquin Valley - San Joaquin Valley Air Pollution Control District
California Air Resources Board
06051
Madera - San Joaquin Valley - San Joaquin Valley Air Pollution Control District
California Air Resources Board
06052
Merced - San Joaquin Valley - San Joaquin Valley Air Pollution Control District
California Air Resources Board
06053
San Joaquin - San Joaquin Valley - San Joaquin Valley Air Pollution Control District
California Air Resources Board
06054
Stanislaus - San Joaquin Valley - San Joaquin Valley Air Pollution Control District
California Air Resources Board
06055
Tulare - San Joaquin Valley - San Joaquin Valley Air Pollution Control District
California Air Resources Board
06056
San Luis Obispo - South Central Coast - San Luis Obispo County Air Pollution Control District
California Air Resources Board
06057
Santa Barbara - South Central Coast - Santa Barbara County Air Pollution Control District
California Air Resources Board
06058
Ventura - South Central Coast - Ventura County Air Pollution Control District
California Air Resources Board
06059
Los Angeles - South Coast - South Coast Air Quality Management District
California Air Resources Board
06060
Orange - South Coast - South Coast Air Quality Management District
California Air Resources Board
06061
Riverside - South Coast - South Coast Air Quality Management District
California Air Resources Board
06062
San Bernardino - South Coast - South Coast Air Quality Management District
California Air Resources Board
06063
Imperial - Salton Sea - Imperial County Air Pollution Control District
California Air Resources Board
06064
Riverside - Salton Sea - South Coast Air Quality Management District
California Air Resources Board
06065
Kern - Mojave Desert - Mojave Desert Air Quality Management District
California Air Resources Board
06066
Riverside - Mojave Desert - Mojave Desert Air Quality Management District
California Air Resources Board
06067
Riverside - Mojave Desert - South Coast Air Quality Management District
California Air Resources Board
06068
Los Angeles - Mojave Desert - Antelope Valley Air Quality Management District
California Air Resources Board
06069
San Bernardino - Mojave Desert - Mojave Desert Air Quality Management District
California Air Resources Board
06086
Del Norte - Ocean between 3-24 nautical miles - North Coast Unified Air Quality Managment District
California Air Resources Board
06087
Humboldt - Ocean between 3-24 nautical miles - North Coast Unified Air Quality Managment District
California Air Resources Board
06088
Los Angeles - Ocean between 3-24 nautical miles - South Coast Air Quality Management District
California Air Resources Board
06089
Marin - Ocean between 3-24 nautical miles - Bay Area Air Quality Management District
California Air Resources Board
06090
Mendocino - Ocean between 3-24 nautical miles - Mendocino County Air Quality Managment District
California Air Resources Board
06091
Monterey - Ocean between 3-24 nautical miles - Monterey Bay Air Resources District
California Air Resources Board
06092
Orange - Ocean between 3-24 nautical miles - South Coast Air Quality Management District
California Air Resources Board
06093
San Diego - Ocean between 3-24 nautical miles - San Diego County Air Pollution Control District
California Air Resources Board
06094
San Francisco - Ocean between 3-24 nautical miles - Bay Area Air Quality Management District
California Air Resources Board
06095
San Luis Obispo - Ocean between 3-24 nautical miles - San Luis Obispo County Air Pollution Control District
California Air Resources Board
06096
San Mateo - Ocean between 3-24 nautical miles - Bay Area Air Quality Management District
California Air Resources Board
06097
Santa Barbara - Ocean between 3-24 nautical miles - Santa Barbara County Air Pollution Control District
California Air Resources Board
06098
Santa Cruz - Ocean between 3-24 nautical miles - Monterey Bay Air Resources District
California Air Resources Board
06100
Sonoma - Ocean between 3-24 nautical miles - Northern Sonoma County Air Pollution Control District
California Air Resources Board
06101
Ventura - Ocean between 3-24 nautical miles - Ventura County Air Pollution Control District
California Air Resources Board
06102
Del Norte - Ocean between 24-100 nautical miles - North Coast Unified Air Quality Managment District
California Air Resources Board
06103
Humboldt - Ocean between 24-100 nautical miles - North Coast Unified Air Quality Managment District
California Air Resources Board
06104
Los Angeles - Ocean between 24-100 nautical miles - South Coast Air Quality Management District
California Air Resources Board
06105
Marin - Ocean between 24-100 nautical miles - Bay Area Air Quality Management District
California Air Resources Board
06106
Mendocino - Ocean between 24-100 nautical miles - Mendocino County Air Quality Managment District
California Air Resources Board
06107
Monterey - Ocean between 24-100 nautical miles - Monterey Bay Air Resources District
California Air Resources Board
06108
Orange - Ocean between 24-100 nautical miles - South Coast Air Quality Management District
California Air Resources Board
06109
San Diego - Ocean between 24-100 nautical miles - San Diego County Air Pollution Control District
California Air Resources Board
06110
San Francisco - Ocean between 24-100 nautical miles - Bay Area Air Quality Management District
California Air Resources Board
06111
San Luis Obispo - Ocean between 24-100 nautical miles - San Luis Obispo County Air Pollution Control District
California Air Resources Board
06112
San Mateo - Ocean between 24-100 nautical miles - Bay Area Air Quality Management District
California Air Resources Board
06113
Santa Barbara - Ocean between 24-100 nautical miles - Santa Barbara County Air Pollution Control District
California Air Resources Board
06114
Santa Cruz - Ocean between 24-100 nautical miles - Monterey Bay Air Resources District
California Air Resources Board
06116
Sonoma - Ocean between 24-100 nautical miles - Northern Sonoma County Air Pollution Control District
California Air Resources Board
06117
Ventura - Ocean between 24-100 nautical miles - Ventura County Air Pollution Control District
California Air Resources Board
California Air Resources Board
CO_NAME
CO_NAME
String
10
0
0
Surrogate ID
California Air Resources Board
Name of the County associated with GAI
AB
AB
String
10
0
0
Surrogate ID
California Air Resources Board
Abbreviation of Air Basin associated with GAI
DIS
DIS
String
10
0
0
Surrogate ID
California Air Resources Board
Abbreviation of Air District associated with GAI
I_CELL
I_CELL
String
10
0
0
I cell identification number. Defines cells in the x direction.
California Air Resources Board
1
384
J_CELL
J_CELL
String
10
0
0
J cell identification number. Defines cells in the y direction.
California Air Resources Board
1
399
SRGID
SRGID
String
10
0
0
Surrogate ID
California Air Resources Board
Surrogate ID assigned by California Air Resources Board
SRG_FRACT
SRG_FRACT
Double
8
0
0
Surrogate fraction. Fraction of GAI emissions to be allocated in the grid cell.
California Air Resources Board
0
1
AREA_FRACT
AREA_FRACT
Double
8
0
0
Fraction of the GAI area in the grid cell, which represents the default grid cell fraction when no spatial information is available and emissions would be spread uniformly over the GAI.
California Air Resources Board
0
1
RATIO
RATIO
Double
8
0
0
SRG_FRACT divided by AREA_FRACT, representing the surrogate fraction normalized by area fraction. A value greater than one indicates greater emissions allocation than a uniform allocation across the GAI and a value less than one indicates less emission allocation in the grid cell than would be expected from a uniform allocation. RATIO can be more informative than SRG_FRACT for visualization of allocation with multiple GAIs, since the effect of GAI size (as well as grid resolution) is eliminated by this normalization.
California Air Resources Board
RATIO_VIZ
RATIO_VIZ
Double
8
0
0
RATIO, but with three transformations to facilitate visualization with a continuous color ramp across multiple surrogate IDs, grid resolutions, and GAI sizes. Outlier values greater than 100 have been set to 100, values less than 0.01 have been set to 0.01, and the base 2 logarithm has been taken so that the visualization color ramp is symmetric around RATIO value of 1 and color scale variation is greater within the typical range.
California Air Resources Board
Shape_Length
Shape_Length
Double
8
0
0
Length of feature in internal units.
Esri
Positive real numbers that are automatically generated.
Shape_Area
Shape_Area
Double
8
0
0
Area of feature in internal units squared.
Esri
Positive real numbers that are automatically generated.
20260515
external
cbe0fd6fe03cfd504c25199bb570605d
Spatial Surrogate Team
California Air Resources Board
Sacramento
CA
95814
spatial.surrogates@arb.ca.gov
US
1001 I Street
(279) 208-7403
True
Spatial Surrogate Team