Click here for full contact information. General Questions/Inquiries GIS Staff gis@wilco.org GIS Director Richard Semple rsemple@wilco.org (512) 943-1489 Addressing Teresa Baker tbaker@wilco.org (512) 943-3707 Addressing Page Elections GIS Candi Zaccheus czaccheus@wilco.org (512) 943-1629 Elections Page
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Williamson County makes a variety of GIS data available to the public. The table below is our online catalog, and most of data are available for immediate download. Other data must be requested via our request form, and still others are linked from other agencies that provide data for Williamson County.
For more information about a data set, please click the metadata link under the data column. If you have questions or need additional information, please feel free to contact us.
All of the data provided by Williamson County will be in ESRI Shapefile format. The files will be in a zipped folder (.ZIP file extension) to conserve bandwidth. Information is provided below on the file formats used and software programs that may be used to access this data.
Williamson County GIS Data Catalog
Shapefile Information: Description of the File format: Wikipedia Technical Documentation of Shapefile: ESRI White Paper (PDF link)
ZIP File Information: The ZIP format is a compressed version of files and data in a single "package" format that makes it easy to transfer. Many software packages can open ZIP format files, including many operating systems. There are many freely available programs, so we have selected a good one at random: ALZip from ALTools (Windows) (Freeware).
Williamson County GIS data can be used natively or imported into a variety of commercial programs. To name the most popular:
In addition to the commercial software, there are some free resources for interacting with our GIS data. At this time Williamson County cannot provide support or assistance for using our data with these products, but there are a number of good guides and tutorials available on the internet.
The maps and data on this site are for general planning purposes only. The underlying basemap conforms to National Map Accuracy Standards in unobstructed areas. Williamson County makes no warranty, representation or guarantee as to the content, sequence, accuracy, timeliness or completeness of any of the database information or spatial locations depicted. Furthermore, all warranties on merchantability and fitness for a particular purpose are hereby disclaimed. In no event shall Williamson County be liable to the recipient or any other party for damages of any type, including but not limited to incidental, consequential or exemplary damages arising out of the use or inability to use these materials.