Explanatory Notes on Geodetic Datums in Hong Kong

The "Explanatory Notes on Geodetic Datums in Hong Kong" contains information about Geodetic Datum, Map Projection and Grids, Vertical Datum and Conversion of Coordinates.

  • Download the "Explanatory Notes on Geodetic Datums in Hong Kong." (PDF)

    • Geodetic Datum Transformation and Map Projection Parameters

    You can set the "Datum Transformation and Transformation Parameters" (The "7-parameters") for conversion of coordinates between HK 1980 Grid Systems and WGS 84 Coordinates for your GPS handheld receivers and applications.

  • Download the "Geodetic Datum Transformation and Map Projection Parameters" (PDF)

  • Download the "Schematic Diagram Showing Transformation of Coordinates between WGS84 Geographic Coordinates and Hong Kong 1980 Grid Coordinates" (PDF)