São Sebastião Geodetic Marker

Viana do Castelo (Portugal) Geodetic Marker

Key Facts

  • Source: RGN
  • Coordinates: 41.64970364, -8.78147633
  • RGN sheet: 05A
  • Marker type: TORRE DE IGREJA
  • Top altitude: 55.4 m
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São Sebastião 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: 41° 38' 58.9331" N, 08° 46' 53.3148" W (41.64970364, -8.78147633). RGN identification: 1:50,000 sheet 05A, type TORRE DE IGREJA.

Altimetry: orthometric altitude at the top 55.4 m; at the base 34.07 m; ellipsoidal altitude at the top 110.4 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-05a-sao-sebastiao

Sobre Viana do Castelo

Capital of Alto Minho, with the iconic Basilica of Santa Luzia overlooking the Lima estuary. City of maritime traditions, crafts and pilgrimages.

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