São Mamede Geodetic Marker

São Mamede 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: 38° 58' 19.6038" N, 09° 13' 43.0319" W (38.97211217, -9.22861997). RGN identification: 1:50,000 sheet 30D, type BOLEMBREANO.

Altimetry: orthometric altitude at the top 280.15 m; at the base 277.65 m; ellipsoidal altitude at the top 334.11 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-30d-sao-mamede