This suggestion was rejected by reviewers of my company. I believe there are some legal/licensing complications involved in using the scheme. I had proposed aerial surveillance of underground petroleum pipelines' ROW (right of way i.e. a stretch of land 60 feet wide running across the country) by a GPS guided Hexacopter, to minimize theft attempts.
I shall be obliged if the problems in the scheme are pointed out, so that I may revise & resubmit the scheme.