Montgomery County IL Topological Faces with Census Geocodes

Topological Faces shapefile from the U.S. Census Bureau's TIGER/Line system for Montgomery County, Illinois. It contains polygon primitives that can be dissolved to build geometries for all Census geographic areas, including key codes for the 2020 Census and annual surveys. The data is part of a seamless national system with no overlaps or gaps.

Use Cases

• Dissolve face geometries on key geographic area codes like Census Tract Number or Block Group to build custom administrative boundaries.
• Join face attributes using the unique topological face identifier (TFID) to other Census datasets for demographic analysis.
• Analyze spatial relationships between different geographic codes such as County Fips Code, 5 digit zip code tabulation area code, and Congressional District Code within the county.

Strengths

• Data originates from the authoritative U.S. Census Bureau Master Address File/TIGER System (MTS), ensuring national consistency.
• Includes key geographic area codes for all areas used in the 2020 Census and annual surveys, enabling multi-year analysis.
• Part of a topologically integrated national file designed with no overlaps or gaps between geographic parts.

Limitations

• Specific row count, column count, and file size are unknown, making it difficult to assess the dataset's scale and structure.
• As a single county extract, analysis is limited to Montgomery County, Illinois unless combined with other TIGER/Line files.

Provenance

Source

U.S. Census Bureau, Department of Commerce

Collection Method

Extract of selected geographic and cartographic information from the Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) System.

Time Range

Includes codes for the 2020 Census and annual estimates/surveys.

Freshness

Last updated on 2025-12-26, indicating recent maintenance.

Geography

Montgomery County, Illinois, United States.