Layer: Food Insecurity Hotspot (ID:21)

View In: Map Viewer

Name: Food Insecurity Hotspot

Display Field: SOURCE_ID

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: The IPUMS National Historical Geographic Information System (NHGIS) provides free online access to summary statistics and GIS files for U.S. censuses and other nationwide surveys from 1790 through the present. NHGIS boundary files are derived primarily from the U.S. Census Bureau's TIGER/Line files with numerous additions to represent historical (1790-1980) boundaries that do not appear in TIGER/Line files. For more recent boundary files (1990 or later), NHGIS typically makes only a few key changes to the TIGER/Line source: (1) we merge files that are available only for individual states or counties to produce new nationwide or statewide files, (2) we project the data into Esri's USA Contiguous Albers Equal Area Conic Projected Coordinate System, (3) we add a GISJOIN attribute field, which supplies standard identifiers that correspond to the GISJOIN identifiers in NHGIS data tables, (4) we rename files to use the NHGIS naming style and geographic-level codes, (5) we add NHGIS-specific metadata, and (6) most substantially, we erase coastal water areas to produce polygons that terminate at the U.S. coasts and Great Lakes shores.NHGIS derived this shapefile from the U.S. Census Bureau's 2024 TIGER/Line Shapefiles.

Copyright Text:

Min. Scale: 0

Max. Scale: 0

Default Visibility: true

Max Record Count: 2000

Supported query Formats: JSON, geoJSON, PBF

Use Standardized Queries: True

Extent:

Drawing Info:

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HasZ: false

HasM: false

Has Attachments: false

Has Geometry Properties: true

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Object ID Field: OBJECTID

Unique ID Field:

Global ID Field:

Type ID Field:

Fields:

OBJECTID (type: esriFieldTypeOID, alias: OBJECTID, SQL Type: sqlTypeOther, length: 0, nullable: false, editable: false)
SOURCE_ID (type: esriFieldTypeInteger, alias: SOURCE_ID, SQL Type: sqlTypeOther, nullable: false, editable: true)
ChicagoTracts_SNAP_PC_Chicago (type: esriFieldTypeDouble, alias: SNAP_PC_Chicago, SQL Type: sqlTypeOther, nullable: true, editable: true)
GiZScore (type: esriFieldTypeDouble, alias: GiZScore Fixed 3003, SQL Type: sqlTypeOther, nullable: true, editable: true)
GiPValue (type: esriFieldTypeDouble, alias: GiPValue Fixed 3003, SQL Type: sqlTypeOther, nullable: true, editable: true)
NNeighbors (type: esriFieldTypeInteger, alias: NNeighbors Fixed 3003, SQL Type: sqlTypeOther, nullable: true, editable: true)
Gi_Bin (type: esriFieldTypeInteger, alias: Gi_Bin Fixed 3003, SQL Type: sqlTypeOther, nullable: true, editable: true)
Shape__Area (type: esriFieldTypeDouble, alias: Shape__Area, SQL Type: sqlTypeDouble, nullable: true, editable: false)
Shape__Length (type: esriFieldTypeDouble, alias: Shape__Length, SQL Type: sqlTypeDouble, nullable: true, editable: false)

Templates:

SOURCE_ID: 0

Is Data Versioned: false

Has Contingent Values: false

Supports Rollback On Failure Parameter: true

Last Edit Date: 4/23/2026 2:38:03 AM

Schema Last Edit Date: 4/23/2026 2:38:03 AM

Data Last Edit Date: 4/23/2026 2:38:03 AM

Supported Operations: Query Query Pivot Query Top Features Query Analytic Query Bins Generate Renderer Validate SQL Get Estimates ConvertFormat