São Gião Geodetic Marker

São Gião 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° 19' 54.112" N, 07° 47' 9.9325" W (40.33169778, -7.78609236). RGN identification: 1:50,000 sheet 20A, type BOLEMBREANO.

Altimetry: orthometric altitude at the top 820.06 m; at the base 817.54 m; ellipsoidal altitude at the top 876.04 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-20a-sao-giao