U.S. Congressional Districts
This map is a transparent overlay showing the congressional districts of the United States, as of the 110th session of congress (January 2007 - January 2009). The districts remain the same for the 111th session (January 2009 - January 2011), so the information is still up-to-date. Here is a detail break down listing the United States congressional districts and redistricting.
To take advantage of the transparent aspect of this map it is best used as an overlay, such as with the World-Light tileset. There are no labels, so it is ideal for situations where further data will appear on top of it. If labels are desired, they would be ideally handled by the web application to take advantage of hovering & other dynamic capabilities.
Sources
License
Free for use in accordance with Terms of Service and with attribution. © Copyright MapBox.
