I’ve made a “deep zoom collection” of the camperdown park graffiti wall, so that you can zoom into it and check the whole west-facing wall out in detail. This was made using PhotoSynth to reconstruct the wall, then my Meshlab to reconstruct a model, then the CameraExport app (I just made) to retexture the model in high-res in 3DS Max.
I can’t embed it, so you’ll have to link to the separate page. It requires the Silverlight plugin, and the wall starts at the very of top of the box. You can go fullscreen.
If your browser setup is not compatible with the Silverlight plugin, you can alternative view a reduced image of the wall reconstruction on Flickr.