Legislative Technology Services Bureau (LTSB) Announcements:
| DATE | ANNOUNCEMENT |
|---|---|
| 4/16/2026 9:00 AM | The 2026 BAS Collection is complete and data is available for download. The next municipal ward collection will be July 2026. |
Welcome to the
LTSB GeoData Collector
Formerly known as WISE-Decade
The LTSB GeoData Collector is a specialized web platform for Wisconsin counties and local governments to upload and document their official GIS boundaries.
Easy Upload
Upload data layers quickly, easily, and all in one place on the Upload Page.
County Contacts
Manage contact information for your county Land Information Officer and County Clerk.
BAS Documentation Tool
Document legal boundary changes and review boundary corrections.
LTSB's Hub Page
Data is standardized, merged, and publicly distributed as authoritative statewide layers.
BAS Collection
The BAS Data Collection application compares U.S. Census Bureau geography with local municipal data. Using the legal boundary changes submitted to the DOA Municipal Data System, annexation documents can be selected and associated to the specific boundary change for the U.S. Census Bureau to reference. The collection of municipal wards is mandated by state law 5.15(4)(br)1.
LTSB's Help Documentation U.S. Census BAS ProgramParcel Collection
The Statewide Parcel Map Initiative is an effort to update a digital parcel map for Wisconsin by aggregating standardized local parcel datasets utilizing GIS technology, per state statutes 16.967 and 59.72. The Parcel Initiative is a multi-faceted, multi-year collaborative effort of the Department of Administration, State Cartographer's Office, and local governments.
DOA's Parcel Initiative SCO's Statewide Parcel DataSchool District Collection
The Wisconsin Department of Public Instruction (DPI) collects and maintains data from districts and schools that is used to inform education research and data analysis. DPI collects and maintains geospatial data related to school locations, school districts, and public libraries. The DPI Open Data Portal contains these publically-available GIS layers and interactive maps.
DPI's GIS & Maps WebsiteBAS Submission Layers:
The current layers below are from the last completed BAS collection. To view the live data maps for this collection period, please go to the LTSB Hub Page .
