Lapa Geodetic Marker

Alter do Chão (Portugal) Geodetic Marker

Key Facts

  • Source: RGN
  • Coordinates: 39.21729036, -7.81092861
  • RGN sheet: 32A
  • Marker type: PILAR TRONCO-CÓNICO
  • Top altitude: 198.52 m
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Lapa 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° 13' 2.2453" N, 07° 48' 39.343" W (39.21729036, -7.81092861). RGN identification: 1:50,000 sheet 32A, type PILAR TRONCO-CÓNICO. Altimetry: orthometric altitude at the top 198.52 m; at the base 195.77 m; ellipsoidal altitude at the top 253.26 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-32a-lapa

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