GENBOX-L ArchivesArchiver > GENBOX > 2005-01 > 1105312441
From: Kathy Lenerz <>
Subject: Re: [GENBOX] Ancestry Chart problem-- bug??
Date: Sun, 09 Jan 2005 18:15:42 -0500
wim prange wrote:
> Unlike the Ahnentafel-numberingsystem (based exclusively on child-parent
> links), the Generation-levels numbering of Genbox also takes spouse-links
> into account: it has the assumption that spouses belong to the same
> generation-level. When there are marriages between generations (and
> producing 'shortcuts' in the chart), Genbox will take the longest route for
> it's numbering and tries to 'level' other generations out across the chart
> (over several levels). As I see it, Genbox tries to line up contemporaries,
> not Ahnentafel nrs.
I really appreciate the detailed attention you have devoted to this issue.
It sure is a puzzler.
I'm not sure how one would define or compute contemporaries, but as a
statistician, I'd look at reducing the variability among the birthdates
within a generation. By that standard, GB has not lined up contemporaries.
Birthdates in Birthdates in Chart
Chart Produced as it Should be
Gen 4 Gen 5 Gen 3 Gen 4
1848 1814 1848 1814
1851 1823 1851 1823
1833 1806 1860 1806
1843 1807 1863 1807
1835 1825 1833
1837 1819 1843
Range 18 47 15 37
std 6.69 13.42 6.18 13.42
(std = standard deviation)
[Note that because part of generations 2&3 have been shoved back a
generation in GB's chart, I've chosen the most comparable generations for
The difference between earliest and latest birthdate, as well as the
variability among birthdates within a given generation is smaller in the
chart as I think it should be constructed than in the chart GB produced.
Whatever algorithm GB is using, the generations produced by the pedigree
report and the ancestor chart are inconsistent.