I hope this is a new idea. I searched key word "pave", then searched in results "stockpile", and again in those results searched "survey" and didnt find anything on this so here's hoping.
Currently you can fill land by terraforming using any dirt stockpile within the survey area. Is it possible to allow a similar mechanic for paving so that if I survey a large area, I can pull from any stockpile in that area for paving?