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Inaccurate values in pj_auth.c #93

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proj4-bot opened this issue May 22, 2015 · 2 comments
Closed

Inaccurate values in pj_auth.c #93

proj4-bot opened this issue May 22, 2015 · 2 comments
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bug C: Core P: major
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4.8.0

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Reported by tharan on 8 Feb 2011 21:49 UTC
Checked out proj4 development version 1962 on 2011/02/04. Running make using cc --version cc (SUSE Linux) 4.3.2 revision 141291 on uname -a Linux snow 2.6.27.54-0.2-default #1 SMP 2010-10-19 18:40:07 +0200 x86_64 x86_64 x86_64 GNU/Linux.

Replaced Pxx values used by inverse CEA ellipsoid with more accurate values, and added comments that document the exact ratios that the Pxx values represent.
In particular, the old value of P20 .01641501294219154443 was apparently a representation of the incorrect ratio 761 / 46360. The correct ration (from Snyder pg 82 is 761 / 45360 represented by the new value .01677689594356261023.

Migrated-From: https://trac.osgeo.org/proj/ticket/93
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Comment by warmerdam on 8 Feb 2011 23:28 UTC
Change applied in trunk (5c012e61 (SVN rev1966)). I will email Gerald to ensure the P20 change makes sense to him.

@proj4-bot proj4-bot added this to the 4.8.0 milestone May 22, 2015
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Attachment added by tharan on 8 Feb 2011 21:49 UTC
https://trac.osgeo.org/proj/attachment/ticket/93/pj_auth.c

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