PDA

View Full Version : New L2 Distribution Map



DillonResearcher
02-22-2017, 10:52 PM
I came across some mapping software this afternoon that is free for non-commercial use and was playing around with it making heat maps for my terminal SNP when I wondered what an L2 distribution heat map would look like.

I downloaded the raw .KML data file from the maps on the U152 project website and then loaded the file up on Google Earth to remove the testers who are piled up in the middle of the sea (the ones that don't know where their ancestor came from). I then exported this file and converted it to .CSV before loading it into the ArcGIS software and here is what it looks like:
14182
14181

The ArcGIS tool looks quite promising for genetic genealogy, there is the option to make your map publicly viewable and/or embed it into your own website. I have kept the map set to private of course since it is hardly my data. When viewing the map they can swap between heat map and point map views and can click on the dots to bring up the same information that you get on the standard U152 project maps.

Osiris
02-22-2017, 11:28 PM
Neat. I suppose if you wanted to adjust the heat intensity to account for over sampling from certain areas you'd have to do that manually? I never downloaded the files you did but I can imagine that would also be pretty tricky. But cool to see.

DillonResearcher
02-22-2017, 11:41 PM
Neat. I suppose if you wanted to adjust the heat intensity to account for over sampling from certain areas you'd have to do that manually? I never downloaded the files you did but I can imagine that would also be pretty tricky. But cool to see.

I don't know if there is a way to make adjustments for just specific areas other than manually, there might be, I may have not found it yet.

When doing a similar map for the SNP above my terminal one I sorted out the problem of over sampling by only using one sample from a group of related people with the same surname and giving this one sample an average location.
14183

haleaton
03-18-2017, 11:35 AM
I was wondering if there was a good source of major Y Haplgroups distributions currently in Great Britain, unbiased by the large number of Americans who test which could be used in such a mapping tool.

Probably posted previously there is is new surname mapping tool for Great Britain that came out last year based on election records, though I do not know how hard it is to get the original data they use.

http://named.publicprofiler.org/

http://www.citylab.com/design/2016/03/map-british-uk-surname-named-public-profiler/471672/

One neat feature is they let you put in two names and get a joint heat map.

So for fun if you have known ancestry back in the UK you can put in a marriage couples name and many times the tool fairly closely identifies the location they were actually from.

If we had similar maps for current distribution of Y haplogroups we could do a joint heat map of surname and Haplogroup.

With many of the surname projects there are groups with the same name but differing Y haplogroups that are distant and sampling is dominated by colonial emigrants to the New World. It would be interesting if these can be correlated back to possible origins.

Bdeed
03-18-2017, 05:44 PM
I work in a biodiversity information centre (wildlife) and have access to various mapping software with species distribution mapping one primary use of data. I am very much an amateur at human population genetics but I suspect there are a lot of similar principles in terms of data visualisation and analysis. In particular, as mentioned above, accounting for sampling bias. If there is an interest I could have a go at investigating this for L2?

Bdeed
03-18-2017, 05:46 PM
Also, If you like mapping then QGIS is an excellent free open source gis software. Which while offline does have plugins which allow you to present interactive maps on the web.