São Sebastião Geodetic Marker

Geodetic Marker

Key Facts

  • Source: RGN
  • Coordinates: 40.67617664, -7.75606744
  • RGN sheet: 17A
  • Marker type: BOLEMBREANO
  • Top altitude: 524.34 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: 40° 40' 34.2359" N, 07° 45' 21.8428" W (40.67617664, -7.75606744). RGN identification: 1:50,000 sheet 17A, type BOLEMBREANO.

Altimetry: orthometric altitude at the top 524.34 m; at the base 521.33 m; ellipsoidal altitude at the top 579.94 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-17a-sao-sebastiao

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