GEODETIC CONTROL POINTS
HMGS has established and maintains the National Trigonometric Network which includes 26,739 trigonometric control points of 1st and 2nd order, with accurate measured coordinates.
Also a number of 201 GPS control points of 1st order exists.
For each control point, you can obtain:
- Geographic coordinates (ellipsoid)
- Planar X,Y coordinates
- Astronomical coordinates
Coordinates can be given in WGS84, UTM, HATT or EGSA87 (Hellenic Geodetic Reference System)