EGSA ’87 is the official national coordinate system used in Greece for the preparation of topographic diagrams. All modern topographic diagrams must be referenced to this system in order to ensure a consistent and accurate spatial reference.

Using EGSA ’87 ensures that the exact location of a property is accurately defined and can be properly linked with the Cadastre, building permits and other official records. Topographic diagrams that are not referenced to EGSA ’87 are often not accepted in legal or administrative procedures.

The correct use of the coordinate system is essential to avoid errors, overlaps or future issues with property boundaries. For this reason, topographic diagrams should always be prepared by a qualified land surveyor.