São João Geodetic Marker

São João 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: 39° 10' 27.2044" N, 09° 03' 36.5722" W (39.17422344, -9.06015894). RGN identification: 1:50,000 sheet 30B, type PILAR S/ IGREJA.

Altimetry: orthometric altitude at the top 665.17 m; at the base 660.6 m; ellipsoidal altitude at the top 719.26 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-30b-sao-joao