SVG (scalable vector graphics) is a relatively new vector graphics format. It is XML or text based and is supported by an increasing number of  software applications. 

SVG files can be opened directly into Illustrator versions 10 or greater.

Our SVG files are fully vector and contain no raster data (i.e. they do not lose resolution the more you zoom in).  They are fully layered and these layers are fully maintained when the SVG file is imported into Illustrator...  you can modify your map a whole layer at a time, turn layers on and off, etc.

Adobe provides a free download of its SVG viewer here:
http://www.adobe.com/svg/
Which will work as a plug-in to your MS Explorer Internet browser and allow you to view the files.

In addition to SVG, we are able to offer our maps in many other vector formats, including PDF and Illustrator.