EPSG
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EPSG null and copy transformations to WGS 84
IOGP Report 373-07-05 Download -
EPSG geodetic parameter relational database – developers guide
IOGP Report 373-07-4 Download -
Using the EPSG geodetic parameter dataset
IOGP Report 373-07-01 Download -
IOGP Report 373-07-02 – Coordinate conversions and transformation including formulas
IOGP Report 373-07-02 Download -
EPSG geodetic parameter registry – developers guide
IOGP Report 373-07-03 Download