EPSG Dataset Terms of Use
Revised 8 April 2016
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Table 1: Permitted modifications of data
AS GIVEN IN EPSG DATASET | PERMITTED CHANGE FOR VENDORS/USERS TO ADOPT | |
---|---|---|
Change of ellipsoid defining parameters. | ||
1a | Ellipsoid parameters a and b. | a and 1/f ; a and f; a and e; a and e2. |
1b | Ellipsoid parameters a and 1/f. | a and b; a and f; a and e; a and e2. |
Change of projection method | ||
2a | Lambert Conic Conformal (1 SP) method with projection parameters φO and kO. | Lambert Conic Conformal (2 SP) method with projection parameters φ1 and φ2. |
2b | Lambert Conic Conformal (2 SP) method with projection parametersφ1 and φ2. | Lambert Conic Conformal (1 SP) method with projection parameters φO and kO. |
3a | Mercator (variant A) method with projection parameters φO and kO. | Mercator (variant B) method with projection parameter φ1. |
3b | Mercator (variant B) method with projection parameter φ1. | Mercator (variant A) method with projection parameters φO and kO. |
4a | Hotine Oblique Mercator (variant A) method with projection parameters FE and FN. | Hotine Oblique Mercator (variant B) method with projection parameters EC and NC. |
4b | Hotine Oblique Mercator (variant B) method with projection parameters EC and NC. | Hotine Oblique Mercator (variant A) method with projection parameters FE and FN. |
5a | Polar Stereographic (Variant A) method with projection parameters φO and kO. | Polar Stereographic (Variant B) method with projection parameter φF. |
5b | Polar Stereographic (Variant B) method with projection parameter φF. | Polar Stereographic (Variant A) method with projection parameters φO and kO. |
5c | Polar Stereographic (Variant A) method with projection parameters φO, kO, FE and FN. | Polar Stereographic (Variant C) method with projection parameters φF, EF and NF. |
5d | Polar Stereographic (Variant C) method with projection parameters φF, EF and NF. | Polar Stereographic (Variant A) method with projection parameters φO, kO, FE and FN. |
5e | Polar Stereographic (Variant B) method with projection parameter FE and FN. | Polar Stereographic (Variant C) method with projection parameters EF and NF. |
5f | Polar Stereographic (Variant C) method with projection parameters EF and NF. | Polar Stereographic (Variant B) method with projection parameter FE and FN. |
Change of transformation method | ||
6a | Position Vector 7-parameter transformation method parameters RX RY and RZ. | Coordinate Frame transformation method with signs of position vector parameters RX RY and RZ reversed. |
6b | Coordinate Frame transformation method parameters RX RY and RZ. | Position Vector 7-parameter transformation method with signs of coordinate frame parameters RX RY and RZ reversed. |
7 | Concatenated transformation using geocentric methods (Geocentric translations, Position Vector 7-parameter transformation, Coordinate Frame rotation). | Equivalent single geocentric transformation in which for each parameter the parameter values of the component steps have been summed. |
Change of units | ||
8 | NTv2 method grid file filename. | NTv2 method grid file relative storage path with file name including removal (if necessary) of “special characters” [spaces, parentheses, etc] which are replaced by underscore characters. |
9 | Parameter value. | Convert unit to another, for example from microradian to arc-second, using conversion factors obtained from the EPSG dataset Unit table. |
Revision history
28 August 2007 | Revised to include on-line registry. |
6 November 2014 | Revised for OGP/IOGP rebranding. |
8 April 2016 | Corrected reference to GN 7-1 in Section 6, Subsection V. |