Double Match Triangulator (DMT)
Double Match Triangulator is an autosomal DNA analysis tool for Windows. DMT determines all the segment triangulations that two people share with some third person. DMT will help you determine the ancestral paths of your matches and put your people into clusters. The results are given to you in Excel files with details for each match, and a summary of all people. You also get a file containing ancestral paths than can be uploaded to DNA Painter. DMT can accept data from FamilyTreeDNA, 23andMe, MyHeritage DNA, or GEDmatch.*** Oct 2023: 23andMe "temporarily" disabled their "Relatives Data Download".
*** Oct 2023: MyHeritage removed their "Export shared DNA segment info" capability and may or may not bring it back.
Family Tree DNA reactived (August 2024) their DNA option to download segment data, however people with many matches have noted that the download just times out and the little circle just goes round and rount and never completes.
So currently only GEDmatch and possibly Family Tree DNA can download the segment data DMT needs.
DMT will still work with files you have previously downloaded from Family Tree DNA, 23andMe and MyHeritage.
Download and Try Double Match Triangulator:
Latest Version:
5.2.1, 12 Jul 2023
Download
The program has been code-signed for your protection. DMT runs on Windows 7, 8, 10 or 11.
The unlicensed version of DMT is fully functional, but only displays chromosome 1.
See the History page for what's new in each version.
Buy a Lifetime License. 60 Day Moneyback Guarantee:
Only $40 US
for a lifetime license
Buy Now!
Secure online transaction: Credit card, PayPal, or wire transfer
Activation key supplied instantly
And all upgrades are free forever!
What DMT Does
DMT combines segment match data of two or more people to find all the double matches and segment triangulations they share. Using known common ancestors of known relatives, DMT determines ancestral paths to indicate the ancestral path that the DNA passed through and it organizes these into triangulation groups for you. DNA relatives who match in a triangulation group may have a common ancestor along or beyond the ancestral path who passed this segment to to all the people in the group. The assignment of ancestral paths to segments of your DNA is known as Chromosome Mapping. The determination of triangulation groups has for a long time been a very labour intensive manual procedure that few people have accomplished. DMT automates this for you and calculates ancestral paths based on common ancestors that you supply, and makes this type of analysis available to anyone. DMT reads two or more segment match files that you can download from several DNA services. The processing of "Double Matching" that DNA uses is able to find every segment triangulation that two people share with a third. A triangulating segment is a indication that the matching segment may be passed down from a common ancestor of the three people. The DMT main window looks like this:
DMT lets you enter the match file for Person A and the match file for Person B or a directory containing Person B match files to compare Person A with. The DMT Chromosome Map page looks like this:
Double Match Triangulator encloses matches in boxes that approximate triangulation groups helping you identify segments people who may have the same common ancestor. The DMT People file looks like this:
DMT can also create a file that can be uploaded to Jonny Perl's DNA Painter. The result in DNA Painter looks like this:
Requirements
Double Match Triangulator requires Windows and has been tested back to Windows 7. It will produce formatted Excel files in .xlsx format that can be read by most spreadsheet programs. Mac users: Sorry but there is only a Windows version. If you have Excel on your Mac, you can still read the Excel files that DMT produces. You can ask one of your DNA relatives to run the program and send you the Excel output files. If you want to run it yourself, I've been told that DMT "runs like a charm on a Mac using Crossover or some other software that lets you run Windows applications." But even better, I've also been told that "DMT runs smoothly with PlayOnMac" which is a free, simple to use emulator for the Mac that doesn't need a reboot or a Windows license. Unix users: DMT should run under Wine. If you don't have Excel: I have been told that on Windows, LibreOffice works better with DMT files than OpenOffice. The latter is poor at handling large Excel files. Google sheets will also open DMT files. DMT works with segment match information. Here's the download instructions for:Using the Program
I've included a fairly comprehensive help file with the program that you can access on this website via the Help link at the top. Please read it. From the program, press the Help button to open the help file locally. The last page of the help file contains ideas, tips and tricks. You can also download the complete DMT Help File in PDF format.DMT won 3rd Place at the 2017 RootsTech Innovator Showdown
