About what Dawid Cowen speaks at 01:14
" - It can be a collection of information from a tower (?) that you've set up"
About what towers he speaks ?
He leads up to that statement (which is labeled 'made by remote sensing') by saying that you can get data from aircraft and satellites. I believe he's using 'tower' in a generic sense. He's just saying that the data could come from anywhere. For instance, you could have a weather station on a pole in your backyard.