Sorry - while I did compose this reply with additional remarks I was not aware that you went further on your own special path.
Please do not take this as an interruption of your contemplation - but since I think it maybe useful to other readers I'll post it and won't intrude further.
Your last sentence ...
A number of points made in sand would leave 0 or 1 points, if you reduce the point away in pairs. Geomancy uses 1 and 2 points, I-Ching an unbroken line and a broken line.
shows where you miss(understand) the system(s) because if you "reduce" the counted (and so added) points "away" in pairs a line of points leaves you with 1 or TWO points!! Odd or Even!! Those 1 or 2 points (and NOT 1 or 0) are NOTED to compose the 4 Mothers & 2 Daughters - and in the same way the Grand Daughter (the answer to the question! > please see the 2 dropbox links below.)
Geomancy considers 2 points as STRONG what can also be noted for the oracle as ONE UN-BROKEN LINE:
These JPGs are from:
5-How the STRUCTURE of the 16 Sign is based on the 8-folded Star from the BEGNNING+2. Form
https://www.dropbox.com/sh/zzabpvkfqp8e ... gxHua?dl=0
These JPGs are from:
6-Meaning is a matter of PERSPECTIVE
https://www.dropbox.com/sh/7bn39pseo1uv ... Kd-Wa?dl=0
So even on this absolute foundation level of 1 element - line and dot - those 2 systems are diametrically opposed to each other and your idea that they are connected seems to stem from your misunderstanding of these fundamental defining fact that your thinking stems from:
Geomancy uses 1 and 2 points, I-Ching an unbroken line and a broken line.
... what I read as:
1 point in Geomancy equals the UNbroken line in I-Ching &
2 points in Geomancy equal the BROKEN line in I-Ching.
What is - as I said above - YOUR misconception!
Why the 16 signs of Geomancy are based on ODD and EVEN I explained in the link ...
2-How the Geomantic ORACLE works
https://www.dropbox.com/sh/65099zo7i856 ... VqHma?dl=0
The I-Ching with it's 64 signs that each consist of 6 levels or "lines" and every line can have 2 possible modes of appearance (whole/strong/male or broken/weak/female).
These hexagrams (hexa... > 6) derive their whole meaning from the placement of each line (broken or whole) in the upper or lower 3 line cluster (trigram) because those trigrams (8 of them are possible and in themselves were considered to illustrate the 8 basic cosmic principles like:
(A lot of easily understandable info there too!)
From these 8 trigrams the universe was build and to understand them is a complicated matter that forces one to try to understand the 5 principles of change first (often falsely compared to the western/Greek 4 elements) which demonstrate HOW ONE energy flows in a circular motion on 2 different paths (destruction or nourishment) THROUGH the whole system of the world/body/matter.
Acupuncture is derived from that too and the whole ancient Chinese medicine.
And scholars believe that those trigrams were the first strata on which the I-Ching was developed - but in ancient times used as an oracle of 8 signs.
As I said these trigrams consist each of 3 lines - and each line can be "broken" or "whole" but this does NOT mean for example: whole = good or broken = bad.
To interpret each sign of the 64 further the trigrams were also forced to work on other levels that you mention:
The CORE-trigrams which add (only in theory!) 2 MORE trigrams to the hexagram of 6 lines
These are the SAME structures as the above cosmic trigrams ONLY used in another thought-system.
http://www.no2do.com/synopse/en/i-ching ... a-hexagram
So no system of 16 here. Or did I misread your (to be corrected) model somehow? (<< this is now after your above post only to be considered a rhetorical question of course