The user assumes the entire risk as to the accuracy and the use of this data. The data may be used, copied and distributed subject to the following conditions
Table 1: permitted modifications of data
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As given in EPSG Dataset |
Permitted change for vendors / users to adopt |
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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. |
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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 (1 SP) method with projection parameters φO and kO. |
Mercator (2 SP) method with projection parameter φ1. |
3b |
Mercator (2 SP) method with projection parameter φ1. |
Mercator (1 SP) method with projection parameters φO and kO. |
4a |
Hotine Oblique Mercator method with projection parameters FE and FN. |
Oblique Mercator method with projection parameters EC and NC. |
4b |
Oblique Mercator method with projection parameters EC and NC. |
Hotine Oblique Mercator 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. |
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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. |
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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. |