Name: DAC_CensusBlockgroups_DWR_ACS_2016_2020

Display Field: NAMELSAD20

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This is a copy of the DWR layer 'Disadvantaged Communities - Block Groups (ACS 2016 - 2020)'. This layer is linked here: https://gis.water.ca.gov/arcgis/rest/services/Society/i16_Census_BlockGroup_DisadvantagedCommunities_2020/FeatureServer The statewide MHI for the Census ACS: 2016 - 2020 dataset is $78,672 - thus, 80% and 60% of that value represents the DAC and SDAC thresholds, respectively. Therefore, a community where the MHI is less than:-$62,936 meets the DAC threshold-$47,203 meets the SDAC thresholdA "0" value is shown in the "Median Household Income" (MHI) field where data are not available (i.e., not published by the US Census American Community Survey).It is used to determine if a block group (BG) is DAC or not by adding ACS (American Community Survey) Median Household Income (MHI) data at the BG level. The IRWM web based DAC mapping tool uses this GIS layer. Every year this table gets updated after ACS publishes their updated MHI estimates. Created by joining ACS 2016-2020 5 year estimates to the Census 2020 Block Group feature class. The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line File is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. Block Groups (BGs) are defined before tabulation block delineation and numbering, but are clusters of blocks within the same census tract that have the same first digit of their 4-digit census block number from the same decennial census. For example, Census 2000 tabulation blocks 3001, 3002, 3003,.., 3999 within Census 2000 tract 1210.02 are also within BG 3 within that census tract. Census 2000 BGs generally contained between 600 and 3,000 people, with an optimum size of 1,500 people. Most BGs were delineated by local participants in the Census Bureau's Participant Statistical Areas Program (PSAP). The Census Bureau delineated BGs only where the PSAP participant declined to delineate BGs or where the Census Bureau could not identify any local PSAP participant. A BG usually covers a contiguous area. Each census tract contains at least one BG, and BGs are uniquely numbered within census tract. Within the standard census geographic hierarchy, BGs never cross county or census tract boundaries, but may cross the boundaries of other geographic entities like county subdivisions, places, urban areas, voting districts, congressional districts, and American Indian / Alaska Native / Native Hawaiian areas. BGs have a valid code range of 0 through 9. BGs coded 0 were intended to only include water area, no land area, and they are generally in territorial seas, coastal water, and Great Lakes water areas. For Census 2000, rather than extending a census tract boundary into the Great Lakes or out to the U.S. nautical three-mile limit, the Census Bureau delineated some census tract boundaries along the shoreline or just offshore. The Census Bureau assigned a default census tract number of 0 and BG of 0 to these offshore, water-only areas not included in regularly numbered census tract areas. The associated data are considered DWR enterprise GIS data, which meet all appropriate requirements of the DWR Spatial Data Standards, specifically the DWR Spatial Data Standard version 3.3, dated April 13, 2022. This data set was not produced by DWR. Data were originally developed and supplied by US Bureau of Census. DWR makes no warranties or guarantees - either expressed or implied - as to the completeness, accuracy, or correctness of the data. DWR neither accepts nor assumes liability arising from or for any incorrect, incomplete, or misleading subject data. Comments, problems, improvements, updates, or suggestions should be forwarded to the official GIS steward as available and appropriate at gis@water.ca.gov.

Service Item Id: 91fa8224662e45e18520c6d129b87e58

Copyright Text: This is a copy of the DWR layer 'Disadvantaged Communities - Block Groups (ACS 2016 - 2020)'. This copy was uploaded by GAMA Staff for use on the GAMA Groundwater Information System.

Default Visibility: true

MaxRecordCount: 30000

MaxSelectionCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0.0

Max Scale: 0.0

Supports Advanced Queries: false

Supports Statistics: false

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: -1.3857274729899999E7
YMin: 3832930.6169999987
XMax: -1.27050295695E7
YMax: 5162403.843199998
Spatial Reference: 102100  (3857)  LatestVCSWkid(0)

Drawing Info:

Renderer:
Class Breaks Renderer:
Field: MHI20
Min. Value: 0.0
ClassBreakInfos:
• Class Maximum Value: 1
  Label: No Data or No Population
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [156, 156, 156, 255]
  Outline:
  Style: esriSLSSolid
  Color: [110, 110, 110, 255]
  Width: 0
• Class Maximum Value: 47203
  Label: Severely Disadvantaged Community (MHI Below $47,203)
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [245, 82, 0, 255]
  Outline:
  Style: esriSLSSolid
  Color: [110, 110, 110, 255]
  Width: 0
• Class Maximum Value: 62938
  Label: Disadvantaged Community (MHI Between $47,203 and $62,938)
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [245, 163, 0, 255]
  Outline:
  Style: esriSLSSolid
  Color: [110, 110, 110, 255]
  Width: 0
• Class Maximum Value: 250001
  Label: Not a Disadvantaged Community (MHI Above $62,938)
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [178, 178, 178, 0]
  Outline:
  Style: esriSLSSolid
  Color: [110, 110, 110, 255]
  Width: 0
Transparency: 29
Labeling Info:

Advanced Query Capabilities:

Supports Statistics: false
Supports OrderBy: false
Supports Distinct: false
Supports Pagination: false
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: false
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false
Supports Percentile Statistics: false
Supports Having Clause: false
Supports Count Distinct: false
Supports Time Relation: true
Supports Sql Format: false
Supports Query Analytic: false
Supports Query With Current User: true

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• FID ( type: esriFieldTypeOID, alias: FID )
• Shape ( type: esriFieldTypeGeometry, alias: Shape )
• OBJECTID ( type: esriFieldTypeInteger, alias: OBJECTID )
• STATEFP20 ( type: esriFieldTypeString, alias: STATEFP20, length: 2 )
• COUNTYFP20 ( type: esriFieldTypeString, alias: COUNTYFP20, length: 3 )
• TRACTCE20 ( type: esriFieldTypeString, alias: TRACTCE20, length: 6 )
• BLKGRPCE20 ( type: esriFieldTypeString, alias: BLKGRPCE20, length: 1 )
• GEOID20 ( type: esriFieldTypeString, alias: GEOID20, length: 12 )
• NAMELSAD20 ( type: esriFieldTypeString, alias: NAMELSAD20, length: 13 )
• MTFCC20 ( type: esriFieldTypeString, alias: MTFCC20, length: 5 )
• FUNCSTAT20 ( type: esriFieldTypeString, alias: FUNCSTAT20, length: 1 )
• ALAND20 ( type: esriFieldTypeDouble, alias: ALAND20 )
• AWATER20 ( type: esriFieldTypeInteger, alias: AWATER20 )
• Pop20 ( type: esriFieldTypeInteger, alias: Pop20 )
• HH20 ( type: esriFieldTypeSmallInteger, alias: HH20 )
• MHI20 ( type: esriFieldTypeInteger, alias: MHI20 )
• DAC20 ( type: esriFieldTypeString, alias: DAC20, length: 18 )
• Shape__Are ( type: esriFieldTypeDouble, alias: Shape__Are )
• Shape__Len ( type: esriFieldTypeDouble, alias: Shape__Len )

Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

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