São Silvestre Geodetic Marker

Viana do Castelo (Portugal) Geodetic Marker

Key Facts

  • Source: RGN
  • Coordinates: 41.72194186, -8.74651350
  • RGN sheet: 05A
  • Marker type: BOLEMBREANO
  • Top altitude: 284.82 m
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São Silvestre 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° 43' 18.9907" N, 08° 44' 47.4486" W (41.72194186, -8.74651350). RGN identification: 1:50,000 sheet 05A, order 3, type BOLEMBREANO. Altimetry: orthometric altitude at the top 284.82 m; at the base 282.32 m; ellipsoidal altitude at the top 339.82 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-05a-sao-silvestre

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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