Silval 1 Geodetic Marker

Geodetic Marker

Key Facts

  • Source: RGN
  • Coordinates: 40.60776028, -8.60825386
  • RGN sheet: 16A
  • Marker type: BOLEMBREANO
  • Top altitude: 61.95 m
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Silval 1 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° 36' 27.937" N, 08° 36' 29.7139" W (40.60776028, -8.60825386). RGN identification: 1:50,000 sheet 16A, type BOLEMBREANO.

Altimetry: orthometric altitude at the top 61.95 m; at the base 57.5 m; ellipsoidal altitude at the top 116.58 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-16a-silval-1

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