Alva Geodetic Marker

Alva 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° 17' 59.8143" N, 08° 07' 1.9125" W (40.29994842, -8.11719792). RGN identification: 1:50,000 sheet 20A, order 4, type BOLEMBREANO.

Altimetry: orthometric altitude at the top 261.13 m; at the base 258.63 m; ellipsoidal altitude at the top 316.48 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-alva