The data in the GIS system comes from many different sources. Each of the layers was processed by different individuals using a variety of methods and original sources. The result is that sometimes the layers do not line up well with each other. For example, the road network does not always match the right-of-ways in the parcel database.
Currently, the Public Land Survey System (Township & Range) and the 2002 Aerial Photos serve as our base map. Where possible, other layers have been adjusted to this base. In some cases, however, it is not possible or feasible to adjust individual layers.