São Martinho Geodetic Marker

São Martinho 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° 40' 17.2182" N, 08° 10' 55.1417" W (39.67144950, -8.18198381). RGN identification: 1:50,000 sheet 23D, type PILAR TRONCO-CÓNICO.

Altimetry: orthometric altitude at the top 355.56 m; at the base 352.77 m; ellipsoidal altitude at the top 410.73 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-23d-sao-martinho