Spot on observations!
I use Google Earth every day to search out new swims. YouTube has many videos of river fishing in France, it's amazing what clues you can find with a bridge in the background, even an easily identified hill can get you close on Google Earth.
Not many locals give away their marks on my local rivers, but there is still enough info online to get me started on a new swim most weeks.
I still have to tramp the banks or get the boat out - but it's great to have some clues first!
Should you feel a little "precious" about one of your better swims it's still best to say absolutely nothing!
Me? I am usually happy to put others on the mark. So little fishing pressure from the locals, there are times I would be glad to see another angler!
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That's my Google Earth project started during one of the lock-downs. Since that screen shot was taken I must have doubled the number of swims I now know, the majority of them I have caught fish from.
Would love to see a few more UK anglers down here! ?