Definition of triangulation from the Merriam-Webster dictionary: A method of finding a distance or location by measuring the distance between two points whose exact location is known and then measuring the angles between each point and a third unknown point.
Cheri's tweak for genealogy and DNA: A method of finding a common ancestor by analyzing the DNA between two paper trail descendants of the common ancestor and then using that information to figure out the 3rd descendant. This can be done with anyone. I just chose this one because it's hard. This person, in the example below, does NOT know his paternal ancestry. Think "pai incognito." And my dad, whose grandparents are double first cousins, has DNA that's probably a bit misleading. Look at the chart below (hope this works): Ancestor Total cMs Longest Relation George M.Anto - Vic 155.0426.37 2CCheri M.Anto - Vic 70.4923.03 4C Todd B.Anto - Vic 58.2520.4 3C Shirley A.Anto - Anto49.44 16.36 4C Gail E.Anto - Franco 26.0310.16 5C Paul S.Anto - Jose ?19 Everyone in the chart comes from Antonio and Constancia. I abbreviated that as Anto. Everyone in the chart also has a paper trail back to Antonio. But we come through different sons. My dad, George, me, and Todd B, come through the son, Victorino. Shirley comes through the son, Antonio. Gail comes through the son Francisco. Paul tested with another company, so I put him at the bottom. When he tests with FTDNA, I'll rerun the chart. So the man whose DNA is "pai incognito" is coming from Antonio, through his son Victorino. As more descendants from Victorino test, we'll figure out who the next generation is. The triangulation part: My dad (George), me, and Todd are the 3 that descend from Victorino that is tying this man with a "pai incognito" into our tree. -- Cheri Mello Listowner, Azores-Gen Researching: Vila Franca, Ponta Garca, Ribeira Quente, Ribeira das Tainhas, Achada -- For options, such as changing to List, Digest, Abridged, or No Mail (vacation) mode, log into your Google account and visit this group at http://groups.google.com/group/Azores. Click in the blue area on the right that says "Join this group" and it will take you to "Edit my membership." --- You received this message because you are subscribed to the Google Groups "Azores Genealogy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/azores.
