Lake County Illinois Street Centerlines with NG911 Specifications

Lake County, Illinois, provides a street centerline dataset for all public and selected private roads. The data follows NG911 and State of Illinois specifications, includes a StreetNameAlias table and a full network topology for Esri Network Analyst, and was used to conflate U.S. Census Bureau TIGER road features. It was last updated on 2026-03-21.

Use Cases

• Building E-911 response systems based on the NG911/State of Illinois data specifications.
• Creating cartographic base maps for spatial analysis based on the street centerline geometry.
• Performing network routing analysis based on the included full network topology for Esri Network Analyst.
• Conflating or improving other road datasets based on the data's use by the U.S. Census Bureau.

Strengths

• Follows NG911 and State of Illinois data specifications, indicating adherence to a formal standard.
• Includes a full network topology for use with Esri Network Analyst extension.
• Should satisfy National Map Accuracy Standards for a 1:1200 scale product.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Freshness should be verified despite the last update date of 2026-03-21.

Provenance

Source

Lake County, Illinois

Collection Method

Roads initially entered using recorded documents and later adjusted using current aerial photography.

Time Range

null

Freshness

Last updated 2026-03-21 21:57:27.603437

Geography

Lake County, Illinois