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| author | Thomas Knudsen <busstoptaktik@users.noreply.github.com> | 2017-12-19 19:22:30 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2017-12-19 19:22:30 +0100 |
| commit | 91be24dbd637c673f38d670f25913c57e92cea00 (patch) | |
| tree | 27f48d31dc4557d561a62351eb0e4c98186fb672 /docs/plot | |
| parent | a70e8a3579064e80f65b1ae118ae90588142886f (diff) | |
| parent | eadbf1520c493d7c62d62b5f0e54c3fdc26c791a (diff) | |
| download | PROJ-91be24dbd637c673f38d670f25913c57e92cea00.tar.gz PROJ-91be24dbd637c673f38d670f25913c57e92cea00.zip | |
Merge pull request #721 from busstoptaktik/iceland
Reykjavik (1900) datum, prerequisites: Danish (Andræ) ellipsoid, and Copenhagen meridian introduced in support of the Reykjavik 1900 datum (Iceland).
The magnitude of the Danish (1876) ellipsoid was originally given in French toise (fathoms) - the Andræ ellipsoid already in PROJ seems to have been transformed to meters using a conversion factor for German fathoms.
This version, based on a French conversion factor of 1.94903631 m/toise, corresponds to the official value for the semimajor axis used by the Icelandic NMA, Landmælingar Íslands, LMI (Guðmundur Valsson, LMI, pers. comm. 2017-12-15).
This value deviates by approximately one centimeter, compared to the truncated value of 6377019.27 m, given in the EPSG:7051 record.
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