I think your putting to much enphasis on locale. This is from greg maxwell's website: http://www.finegtps.com/Geographic_races.html
Mainland chondros are far more variable than the two island races. New Guinea is large and rugged, and there are many populations of GTPs that are not geographically isolated from each other. This results in the blending of traits, making mainland animals more difficult to describe and identify.
Several mainland towns have lent their names to chondro "localities", but in fact these are simply human population centers where the collection and exportation of the pythons have been facilitated. Sorong and Jayapura are two commonly used names, and "Sorong" has come to be closely identified with certain mainland traits. PNG is used to designate animals believed to have their roots from the Papaua New Guinea side of the Island country. (Irian Jaya, the western half of the island, is now called West Papua.)
The only way to know an exact locale is to go out collect the animal and GPS the cordinates.