What are the geodetic vertices?

Vértices geodésicos en España
Have you ever climbed a mountain and you have found on top with a concrete cylinder? Well those are the geodetic vertices, points in time used as a reference for developing cartographic maps. Spain has about 11,000.
Knowing the altitude and the exact position of each, and taking into account that is placed to be seen with each other, we could draw accurate maps. These divided Spanish territory in triangular sections, so each milestone, on paper, representing the apex of a triangle.
Indeed, since 1975 are protected by the “Law on Geodetic and Geophysical Signals, ” so it is not advisable to make them a “graffiti”, plus there must be an unconscious to do that with an element that has already passed part of our history

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