The area being worked falls within a bounding box of
WEST LONGITUDE=40.900618° E
NORTH LATITUDE=64.514710° N
EAST LONGITUDE=80.466861° E
SOUTH LATITUDE=30.922578° N
COVERED AREA=4278335 sq mi
give or take a bit, I've been awake to long to nudge much in Global Mapper to get much more accurate. I posted a pick, ( in wagnerhammer, joost cause oi loike it).
here, because I couldn't find the ones done by Waldronate, he beat me to it.
SeerBlue