Interestingly these three entries show close association with each other
ECSD
www.kannapedia.net
SOUR D
www.kannapedia.net
NYCD
www.kannapedia.net
So I guess this site, should you want to submit a sample, can tell you which if any other samples they have collected are a close match.
for example here is another ECSD sample that doesn’t match the other 3 listed above.
www.kannapedia.net
And interestingly, they have a sample AJ Sour Diesel and Original Diesel which show a relation
AJ
www.kannapedia.net
Original Diesel
www.kannapedia.net