Coordinate Frame rotation & Cartesian Grid Offsets by Grid Interpolation (HEPOS)

Attributes

Data source: EPSG

Information source: Ktimatologio S.A. (Hellenic Cadastre) Geodetic Department, "Coordinate Transformation Model between the HEPOS Reference System (HTRS07) and the Hellenic Geodetic Reference System (GGRS87)", October 2008. https://www.hepos.gr/

Revision date: 2026-07-21

Remarks: This method is an operation pipeline consisting of (i) a Helmert 7-parameter transformation (Coordinate Frame rotation convention), and (ii) application of a correction surface made through Cartesian grid offsets derived by bi-linear interpolation of grid files.

Covered area powered by MapTiler

Formula

See Ktimatologio S.A. (Hellenic Cadastre) Geodetic Department, "Coordinate Transformation Model between the HEPOS Reference System (HTRS07) and the Hellenic Geodetic Reference System (GGRS87)", October 2008. https://www.hepos.gr/

Example

See Ktimatologio S.A. (Hellenic Cadastre) Geodetic Department, "Coordinate Transformation Model between the HEPOS Reference System (HTRS07) and the Hellenic Geodetic Reference System (GGRS87)", October 2008. https://www.hepos.gr/

EPSG:1163