For help with Dane County GIS data or software, contact the Land Information Office or your department's GIS Coordinator.

If you identify problems with a GIS dataset, please send an email describing the problem (include a screen shot if possible) to the Land Information Office.  We will work with the data producer(s) to make the appropriate corrections.

Your layer's link to its data is broken.  This can happen if the data has been moved to another directory or the network connection to the data directory is down.  Click on the link to find more info on how to fix this problem.

An aerial photograph and an orthophoto may look alike, but there are several important differences that allow an orthophoto to be used like a map.  You cannot measure distances on an aerial photograph like you can on a map. An aerial photo is not a map. The effects of tilt and relief are removed from the aerial photograph by a mathematical process called rectification. An orthophoto is a uniform-scale image. Since an orthophoto has a uniform scale, it is possible to measure directly on it like other maps. An orthophoto may serve as a base map onto which other map information may be overlain.