I read the word tiled, so I guess this method would mean a lot of work to load each ter apart, eventually covering a large expanse. As that's what I gather is needed.
I would think repeated image maps and some appropriate masking would be easier, but then you'd have to convert your ters to 16-bit grey image maps for displacement. It would be easy to do the same for the textures, so they'd cover the right similarly masked areas.