[JeffF.]

I recently got out the maps in the Silmarillion and the map in Unfinished Tales (UT)(which is an updated version of the one in LotR). I realized that the distance from the hill Himring to the Ered Luin mountains in the Silmarillion map is twice that as the island of Himling is from the mountains of Ered Luin in the UT map. To me that indicates that there is a difference in scale between the two maps (since the hill Himring and the island Himling are the same geological feature and that the area were are looking at in the UT map is about twice the size of the area of the Silmarillion map, or more precisely the scale of the Silmarillion map is half that of the UT map.

It does not appear that this difference in scale has been taken into account in the mergin of the two maps in the earlier post.