Name: Polygons_Project1

Display Field: Name

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This polygon layer displays the modeled travel-time service areas generated from police stations located in or near statistically significant arson hotspot communities in Chicago. Using Network Analyst in ArcGIS Pro, 2-, 5-, and 10-minute response zones were calculated along the Chicago street network. These polygons estimate areas that police units can reach within specified time thresholds, highlighting emergency accessibility to high-risk arson locations.The service area boundaries were created using selected police stations as facilities and modeled with travel-time impedance. Only realistic street paths were considered, with line, point, and polygon barriers applied automatically during routing. This dataset supports public safety planning, hotspot mitigation, and evaluation of emergency service coverage.Temporal Scope: January 1 – December 31, 2020.

Copyright Text: City of Chicago Data Portal (2020), ESRI Network Analyst

Min. Scale: 0

Max. Scale: 0

Default Visibility: true

Max Record Count: 2000

Supported query Formats: JSON, geoJSON, PBF

Use Standardized Queries: True

Extent:

XMin: 1133832.31702566
YMin: 1839607.84444332
XMax: 1193926.15158008
YMax: 1951924.34851812
Spatial Reference: 103037 (6455)

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:

Name : ObjectID

IsSystemMaintained : True

Global ID Field:

Type ID Field: ToBreak

Fields:

• ObjectID (type: esriFieldTypeOID, alias: ObjectID, SQL Type: sqlTypeOther, length: 0, nullable: false, editable: false)
• FacilityID (type: esriFieldTypeInteger, alias: FacilityID, SQL Type: sqlTypeOther, nullable: true, editable: true)
• Name (type: esriFieldTypeString, alias: Name, SQL Type: sqlTypeOther, length: 1024, nullable: true, editable: true)
• FromBreak (type: esriFieldTypeDouble, alias: FromBreak, SQL Type: sqlTypeOther, nullable: true, editable: true)
• ToBreak (type: esriFieldTypeDouble, alias: ToBreak, 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)

Types:

ID: 2
Name: 2-Minutes
Domains:

Templates:

Name: 2
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

• ToBreak: 2

---

ID: 5
Name: 5-Minutes
Domains:

Templates:

Name: 5
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

• ToBreak: 5

---

ID: 10
Name: 10-Minutes
Domains:

Templates:

Name: 10
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

• ToBreak: 10

---

Is Data Versioned: false

Has Contingent Values: false

Supports Rollback On Failure Parameter: true

Last Edit Date: 1/29/2026 9:55:41 PM

Schema Last Edit Date: 1/29/2026 9:55:41 PM

Data Last Edit Date: 1/29/2026 9:55:41 PM

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