Calvo Geodetic Marker

Calvo 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° 06' 2.6355" N, 09° 19' 8.2438" W (39.10073208, -9.31895661). RGN identification: 1:50,000 sheet 30C, order 4, type BOLEMBREANO.

Altimetry: orthometric altitude at the top 81.11 m; at the base 78.58 m; ellipsoidal altitude at the top 135.06 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-30c-calvo