Silveira Geodetic Marker

Alter do Chão (Portugal) Geodetic Marker

Key Facts

  • Source: RGN
  • Coordinates: 39.19296078, -7.58356011
  • RGN sheet: 32B
  • Marker type: PILAR TRONCO-CÓNICO
  • Top altitude: 352.07 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° 11' 34.6588" N, 07° 35' 0.8164" W (39.19296078, -7.58356011). RGN identification: 1:50,000 sheet 32B, type PILAR TRONCO-CÓNICO. Altimetry: orthometric altitude at the top 352.07 m; at the base 349.35 m; ellipsoidal altitude at the top 407.08 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-32b-silveira

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