MCLIO Landing Page

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New Service Site and Web Mapping Application

The MCLIO has undergone a couple large migrations over the past year.  These include migrating all of our GIS services, GIS data, and creating a new Web Mapping Application.  This will effect the public in mulitple ways.

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New Services for 2015 Aerial Photo

As of Monday December 11, 2017 our existing 2015 Aerial Photo services will no longer be available. New services are available now!

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Cadastral Data Update

Our cadastral data is now current as of Febrary 9, 2018 for downloading and viewing!

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Pictometry Online Update

Pictometry Online will no longer be in service as of December 21, 2017. All users should transition to Pictometry Connect.

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Online Applications 

Web Mapping Application

  • The MCLIO Interactive Mapping Application can be used for viewing cadastral and property information data throughout Milwaukee County as well as downloading cadastral documents.
  • Request Access to secured mapping

Mobile Parcel Viewer

  • The Mobile Parcel Viewer is a simplified, mobile friendly version of the Web Mapping Application.  This can be used for viewing parcel information.




Pictometry Connect


1910 Sanborn Fire Insurance Swipe App

  • The MCLIO, in partnership with the UWM AGSL, has georectified the 1910 Sanborn Fire Insurance maps of Milwaukee County.  This raster dataset was created by taking high resolution scans of over 900 large-format sheets, georeferencing, and then mosaicing them together. These incredibly detailed maps are still used today by environmental surveyors, historians, and urban planners; now they have been made more accessible than ever with this web application.

Cadastral Viewer with Property Information

  • Similarly to the Interactive Web Mapping Application, this app can be used to view and download cadastral and property information data.  The URL to docuements is embedded directly in the cadastral attibute table. 









GIS Data Downloads

Data Download App

  • Available by Township, Section in CAD and GDB format.





Open Data

  • Available in Shapefile, KML, or Spreadsheet form.





Data Download Form

  • Access a variety of county-wide data
  • Formats: GDB, LAF, TIF, SID





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