Most of the time you will see a strategy map represented as a 2D graphic in ConceptDraw PRO or Microsoft Visio which then visually shows all of the dependencies between the identified areas in the company that are being measured and what is being measured. I have built a mind map that does this in a mind map format rather than a static 2D business rendering. The great thing about using a mind map is that once the map is complete it can then easily be exported to PowerPoint, as a slide presentation. This makes it is then easy to communicate to larger groups of stake holders.
The strategy map template I developed, I have placed at MindMapPedia as a free download so any one can download and use it http://www.mindmappedia.com/?id=107455082; if you are interested in a free trial of the mind map software, ConceptDraw MINDMAP, I used to construct the strategy map template you can download that at http://www.conceptdraw.com.