Purpose
Many borders were created as the invisible lines of latitude or longitude, which often created a need to mark these borders on the ground, as closely as possible to these lines, using the available technology of the day. The advances in GPS technology proves that there are many inaccurately marked borders on the ground.
Boundary markers have often been used to mark critical points on boundaries between countries, states or local administrations but have also been used to mark out the limits of private land-holdings especially in areas where fences or walls are impractical or unnecessary.
Boundary markers may be used to mark property boundaries (land-ownership), or political boundaries. In developed countries use of markers for land-ownership has in many places been replaced by maps and land ownership registration. Markers are still used extensively for marking international borders; international boundary markers are placed and can be maintained by mutual agreement of the bordering countries.
Read more about this topic: Boundary Marker
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