Columbia County, Georgia implemented 3D mapping data which is accessible through a simple viewer or through ArcMap and AutoCAD. It is also accessible in the field with laptops via wireless VPN connections.
The article describes it, “Think of Google Street View, but with the added bonus of measuring the height and depth of structures along the streets”. Sounds similar to Pictometry Online but it was developed by Earthmine.
http://www.govtech.com/geospatial/Many-Benefits-3-D-Maps.html
