Mapped chromosomes down to 12cMs

Here's my 2018 end of year snapshot overall chromosome map, down to 12cM segments, by assigned Grandparent to give me as good a picture as I can as at now - both for ease of reference and as a measure of progress at the end of 2019.

It was a bit easier than I thought it might be to update the chromosome maps from yesterday down from the 15cMs used for those to the 12cMs minimum segment size used for the below. I had apparently been keeping up with the new smaller matches after all.

Gained a whole 6% more mapped DNA but it took over 450 more segments (from 12 to 15cMs) to add that 6%.

Dec 2018 Chromosome Map, by Grandparent, of 12+cM segments - DNAPainter

Still way too many yellow/orange/brown mysteries in there, hopefully disguising good clues to the brickwalls.

FWIW a table of the numbers of mapped segments per Side and Grandparent, split by 12-15cMs and over 15cMs is thrown in for contemplation.


-->

Side	GrdParent	12-15	GT15	Total Result
A	Paternal? or Maternal? Side A	4	6	10
B	Paternal? or Maternal? Side B	1	6	7
M	Ern ANDREWS b. 1881 (TNK)	60	103	163
	Ern ANDREWS b. 1881 (TNK) assumed	25	24	49
	Honor ROWE b. 1886 (TNK)	43	144	187
	Honor ROWE b. 1886 (TNK) assumed	6	8	14
	Maternal - branch unknown	86	143	229
	Maternal assumed - branch unknown	6	15	21
P	Agnes Manson DAVIDSON b. 1885 (OTG)	49	64	113
	Agnes Manson DAVIDSON b. 1885 (OTG) assumed	7	3	10
	Archibald HENDERSON b. 1883 (OTG)	106	176	282
	Archibald HENDERSON b. 1883 (OTG) assumed	20	22	42
	Paternal - branch unknown	51	29	80
	Paternal assumed - branch unknown	12	12	24
Total Result		476	755	1231
		39%	61%	100%

The data comes from the main testing companies, FamilyTreeDNA, MyHeritage, 23andme, ie the ones who actually supply the segment level detail necessary (ie excludes Ancestry who refuses too). With many testers only on their original company it is not always possible to compare matches with known relatives at the right spots for accurate assignments, hence the "assumed" and "unknown" categories.
Do please consider transferring your DNA file to GEDMatch where cross company comparisons may be made!