Please can you edit your post as it is almost unreadable - I think I can figure out what you are answering - there is the quote option " or you can put the original question in bold, in either case, put the question first, then the answer.
The latitude & longitudes have spaces in them that mean they don’t have to be edited for Google Maps to understand them:
15 ° 49 ′ 02 ″ north, 9 ° 24 ′ 39 ″ west → 15°49′02″N, 9°24′39″W
Not really, water level sensors for rivers & reservoirs are common enough.
I can address the other points once you’ve edited your post - it’s the pencil option at the bottom of your post.