Category: Twitter

@grahamguy That’d be the sort of thing I had in mind. Something that could be dropped like lawn-darts from a distance. Cheap & hands-off.

They also require line of sight from a single centre point.

A theodolite & reflectors is how subsidence is monitored currently. Theodolites are really expensive & delicate though.

The viral footage of landslides makes me wonder if there’s a low-power way of accurately monitoring the relative location of many sensors.

RT @markthomasinfo: Sorry for last tweet, half asleep. Should have read- Brexit negative: Expats working in EU return to UK.