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Information page for the WashCoGIS viewer

CVTGIS is now WashCoGIS (7/9/14)

CVTGIS is now WashCoGIS.  Application URLs on this page have been updated.  You will need to update any bookmarks you have.

The WashCoGIS viewer provides access to the latest parcel maps and property data available from Washtenaw County through an interactive map viewer. The viewer shows a variety of property data for the entire county including parcels, aerial photos, topography, schools, and natural features.


We've set up a collection of screencasts showing you how to use CVTGIS. Please visit the training video page here

Authorization and Documentation

Access to the WashCoGIS viewer requires a login. Your existing logins from the CVTGIS viewer will work with WashCoGIS. 

If you have not already received credentials for entry into the site, please contact Nate Arnold at or 734-222-6792 to register.

Please remember that WashCoGIS is intended for use by employees of Washtenaw County and its cities, villages, and townships.  Do not distribute your user credentials to people outside of your organization.  Much of the same information on WashCoGIS is available on our public site, MapWashtenaw, so please refer the public and consultants there instead.   


Read our guide on how to use the application here.

Are you using BS&A Assessing? 

.NET Assessing

The steps to enable the Map It button are: 

  1. Launch the Equalizer Application. 
  2. Go to Program Setup. 
  3. Go to Tab 2 “Program Settings”. 
  4. Go to the “General Settings” button. 
  5. To the right of the heading “Custom Mapping System URL” towards the bottom of the page is a text box 
  6. In that box, copy and paste the following exactly as it appears below (note this is all on one line):<parcel>

Be sure to watch for the proper capitalization and include all symbols, such as question marks (?), equals signs (=), and angle brackets (< >). 

Pervasive Assessing

You can link directly to the new mapping site by using this format (note this is all on one line):,PIN,<PARCEL>

Put this text into the Program Management --> Accessory Programs --> Mapping system URL box in BS&A Assessing.  Your Map button will then automatically zoom to the selected parcel when the site launches. 


The information provided through this mapping application is for informational purposes only and are provided without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability and fitness for a particular purpose. The map layers are compiled from a variety of sources and should not be used for site-specific decision making.  I understand that the credentials provided to me for accessing this site are not to be distributed to people outside of my city, village, or township.

***** I agree to these terms. Launch the CVTGIS viewer. *****


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