Castelo Velho Geodetic Marker

Mação (Portugal) Geodetic Marker

Key Facts

  • Source: RGN
  • Coordinates: 39.57035581, -7.82599464
  • RGN sheet: 28A
  • Marker type: BOLEMBREANO
  • Top altitude: 436.89 m
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Castelo Velho 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' 13.2809" N, 07° 49' 33.5807" W (39.57035581, -7.82599464). RGN identification: 1:50,000 sheet 28A, order 2, type BOLEMBREANO. Altimetry: orthometric altitude at the top 436.89 m; at the base 434.43 m; ellipsoidal altitude at the top 492.07 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-castelo-velho

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