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Geodetic marks of the Utilitarian Network of Catalonia
Geodetic networks are made up of a group of points in the territory, called trig points, which are used to measure the land accurately and are usually pillars or markers.
Geodetic marks of the Utilitarian Network of Catalonia
Geodetic networks are made up of a group of points in the territory, called trig points, which are used to measure the land accurately and are usually pillars or markers.
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