This made me wonder...are (most) of the (undisputed) borders of the world actually stored somewhere? Or are some stones and posts still the "official" borders?
You can see some examples here, with the numbers and type of landmarks (apparently there are 1010 stone marks, other types of marks are wet marks for example, like rivers and lakes): https://pt.wikipedia.org/wiki/Lista_de_tro%C3%A7os_da_raia_(...
https://en.wikipedia.org/wiki/Olivenza#Claims_of_sovereignty
The re routing Spain is doing is contributing to the destruction of a massive portion of Portugal ecosystems.
This is all geo referenced against the OSGB coordinate system.
I could see interesting challenges in doing this for international borders where both countries use different coordinate systems and projections for their mapping, and the potential for slithers of no-mans-land. I guess at a certain point, you need to refer back to what's on the ground, as over decades the land erodes from the sea, and rock formations collapse and shift as the earth moves etc. The definition of location gets far easier when you have satellites offering precision navigation and timing!
You'd think location via GPS or similar framework was easy but it's not nearly as easy as you'd think. Among other things, the land is moving. Both continental plates and then also local features like river beds. See e.g. https://www.youtube.com/watch?v=_TX--Fku9NQ
Likewise, the exact location of borders between properties is usually ill-defined. Only borders that have gone through a painstaking process of surveying and registering (usually after a dispute or on a new build) are exactly defined. Usually, when you move into a new house, you have a fence around your property, and the boundary is generally assumed to be inside the fence (with conventions for whose land the fence sits on that aren't always followed).
Adverse possession makes it more complicated. A neighbour decided to put up a new fence, and weren't nice about it. I stipulated (in line with the law) that no part of the new fence could be placed on my property (except parts under the ground surface). They decided to put the fence in the "wrong" way round, with the vertical posts on their property, and the fence attached on their side of the posts, effectively giving me sole access to the area of land in-between their fence posts. If I were to sell my house, the new owner would be quite reasonable in assuming that that land was theirs. After the requisite time, I could apply to have the land legally registered as mine, although the new laws mean that the neighbour would be informed and given a chance to "evict" me from the land - they would have to tear down their fence and rebuild it the right way round so that I don't have sole access to it any more. In this way, adverse possession effectively resets the boundary to where the actual fence is in practice every now and again, which means that the land registry doesn't need to store exact boundary locations.
The white area being roads and non-registered land (mainly stuff that hasn't sold for decades and roads).
It's great, I can find a unique owner for any bit of field I have a question about, the size of the plot, etc.
The downside is that to get a copy of the actual entry in the register (to see who owns it and any covenants on the property there are), you have to pay £3. The entire process is digital and automated, IMO it should be free, but I suppose it's not a terrible price.
ex, in my country forest owners get spammed and targeted by forest-management companies that want to cut it down.
“Follow river such and so, then on that one field of farmer Jones turn left until the tree, turn right and walk in a straight line to that pointy rock, then walk back to the river etc. etc.”?