(2) NORTH POLAR REGIONAL MAPS, PJ41-PJ72

There are still some variations in the scale and extent of the maps in the early perijoves in this set, but from PJ49 onwards, they are routinely presented down to 45°N at the edges, at 30 px/deg.  Before PJ49, maps were generally compiled as described for the previous batch.  From PJ49 onwards, G.E. used a semi-automated assembly method, eliminating the need for manual compilation.

PJ41-PJ50_N-polar-maps
PJ51-PJ72_N-polar-maps