Layers:

Layer: Independent_System_Operators (0)


Name: Independent_System_Operators

Display Field: NAME

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This feature class/shapefile represents electric power Independent System Operators. Independent System Operators were set up by the Federal Energy Regulatory Commission (FERC) to provide non-discriminatory access to power and to more adequately administer the transmission grid on a regional basis throughout North America. The following updates have been made since the previous release: updated attribution using best available sources.

Copyright Text: Oak Ridge National Laboratory (ORNL), Los Alamos National Laboratory (LANL), Idaho National Laboratory (INL), National Geospatial-Intelligence Agency (NGA) Homeland Security Infrastructure Program (HSIP) Team

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: -124.409708682525
YMin: 25.8370562236333
XMax: -66.9501303830745
YMax: 49.3842705145511
Spatial Reference: 4269 (4269)


Drawing Info:

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HasM: false

Has Attachments: false

Has Geometry Properties: true

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Object ID Field: FID

Unique ID Field:

Name : FID

IsSystemMaintained : True


Global ID Field:

Type ID Field: NAME

Fields:
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• ID (type: esriFieldTypeString, alias: ID, SQL Type: sqlTypeOther, length: 10, nullable: true, editable: true)
• NAME (type: esriFieldTypeString, alias: NAME, SQL Type: sqlTypeOther, length: 80, nullable: true, editable: true)
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• PEAK_LOAD (type: esriFieldTypeDouble, alias: PEAK_LOAD, SQL Type: sqlTypeOther, nullable: true, editable: true)
• AVG_LOAD (type: esriFieldTypeDouble, alias: AVG_LOAD, SQL Type: sqlTypeOther, nullable: true, editable: true)
• YEAR (type: esriFieldTypeString, alias: YEAR, SQL Type: sqlTypeOther, length: 13, nullable: true, editable: true)
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• Shape__Length (type: esriFieldTypeDouble, alias: Shape__Length, SQL Type: sqlTypeDouble, nullable: true, editable: false)

Types:

ID: CALIFORNIA INDEPENDENT SYSTEM OPERATOR
Name: CALIFORNIA INDEPENDENT SYSTEM OPERATOR
Domains:

Templates:

Name: CALIFORNIA INDEPENDENT SYSTEM OPERATOR
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

• NAME: CALIFORNIA INDEPENDENT SYSTEM OPERATOR

---

ID: ELECTRIC RELIABILITY COUNCIL OF TEXAS, INC.
Name: ELECTRIC RELIABILITY COUNCIL OF TEXAS, INC.
Domains:

Templates:

Name: ELECTRIC RELIABILITY COUNCIL OF TEXAS, INC.
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

• NAME: ELECTRIC RELIABILITY COUNCIL OF TEXAS, INC.

---

ID: ISO NEW ENGLAND INC.
Name: ISO NEW ENGLAND INC.
Domains:

Templates:

Name: ISO NEW ENGLAND INC.
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

• NAME: ISO NEW ENGLAND INC.

---

ID: MIDCONTINENT INDEPENDENT TRANSMISSION SYSTEM OPERATOR, INC..
Name: MIDCONTINENT INDEPENDENT TRANSMISSION SYSTEM OPERATOR, INC..
Domains:

Templates:

Name: MIDCONTINENT INDEPENDENT TRANSMISSION SYSTEM OPERATOR, INC..
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

• NAME: MIDCONTINENT INDEPENDENT TRANSMISSION SYSTEM OPERATOR, INC..

---

ID: NEW YORK INDEPENDENT SYSTEM OPERATOR
Name: NEW YORK INDEPENDENT SYSTEM OPERATOR
Domains:

Templates:

Name: NEW YORK INDEPENDENT SYSTEM OPERATOR
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

• NAME: NEW YORK INDEPENDENT SYSTEM OPERATOR

---

ID: PJM INTERCONNECTION, LLC
Name: PJM INTERCONNECTION, LLC
Domains:

Templates:

Name: PJM INTERCONNECTION, LLC
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

• NAME: PJM INTERCONNECTION, LLC

---

ID: SOUTHWEST POWER POOL
Name: SOUTHWEST POWER POOL
Domains:

Templates:

Name: SOUTHWEST POWER POOL
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

• NAME: SOUTHWEST POWER POOL

---


Is Data Versioned: false

Has Contingent Values: false

Supports Rollback On Failure Parameter: true

Last Edit Date: 12/11/2025 11:58:04 PM

Schema Last Edit Date: 12/11/2025 11:58:04 PM

Data Last Edit Date: 12/11/2025 11:58:04 PM