Silveira Geodetic Marker

Key Facts

  • Source: RGN
  • Coordinates: 39.57857825, -7.78428289
  • RGN sheet: 28A
  • Marker type: PILAR TRONCO-CÓNICO
  • Top altitude: 241.66 m

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Silveira Geodetic Marker is a point in the Portuguese National Geodetic Network (RGN), the reference network used for mapping, surveying and geographic measurement in Portugal. Coordinates: 39° 34' 42.8817" N, 07° 47' 3.4184" W (39.57857825, -7.78428289). RGN identification: 1:50,000 sheet 28A, type PILAR TRONCO-CÓNICO. Altimetry: orthometric altitude at the top 241.66 m; at the base 239.05 m; ellipsoidal altitude at the top 296.82 m. This record is based on official RGN coordinate data and is useful for understanding the landscape, planning map work or identifying a precise geographic reference point. Local access conditions can vary, so check the terrain before visiting. RGN source ID: rgn-28a-silveira

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