Layers:

Layer: PM2_5 (18)


Name: PM2_5

Display Field: COUNTY

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: The Maryland land county boundaries were built using political county boundaries and the National Hydrology Data (NHD). Land boundaries are a key geographic featue in our mapping process.This data has been modifed from its original form. Please see the process steps for more details.

Copyright Text: MD iMAP, SHA

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: -8723372.5342
YMin: 4615533.4865
XMax: -8466928.6064
YMax: 4825709.1472
Spatial Reference: 102100 (3857)


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: DISTRICT

Fields:
• OBJECTID (type: esriFieldTypeOID, alias: GIS Object ID, SQL Type: sqlTypeOther, length: 0, nullable: false, editable: false)
• COUNTY (type: esriFieldTypeString, alias: County, SQL Type: sqlTypeOther, length: 18, nullable: true, editable: true)
• DISTRICT (type: esriFieldTypeDouble, alias: District, 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: 0
Name: 0
Domains:

Templates:

Name: 0
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

• DISTRICT: 0

---

ID: 3
Name: 3
Domains:

Templates:

Name: 3
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

• DISTRICT: 3

---

ID: 4
Name: 4
Domains:

Templates:

Name: 4
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

• DISTRICT: 4

---

ID: 5
Name: 5
Domains:

Templates:

Name: 5
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

• DISTRICT: 5

---

ID: 6
Name: 6
Domains:

Templates:

Name: 6
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

• DISTRICT: 6

---

ID: 7
Name: 7
Domains:

Templates:

Name: 7
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

• DISTRICT: 7

---


Is Data Versioned: false

Has Contingent Values: false

Supports Rollback On Failure Parameter: true

Last Edit Date: 2/24/2026 6:51:43 PM

Schema Last Edit Date: 2/24/2026 6:51:43 PM

Data Last Edit Date: 2/24/2026 6:51:43 PM