Corridor watching for canals, aqueducts and pipelines

Operators of long linear water assets can't walk thousands of kilometres often enough to catch encroachment, illegal tapping, erosion or blockage. ETD differences 1 m visual and 2 m multispectral along the corridor centreline against its own recent baseline and prices per kilometre — so an entire national network is monitored on one schedule instead of paying tasking fees per pass. The packaged Corridor Watching service is in development; today ETD delivers the frequent visual and multispectral layers, and the change reads, it is built on.