After a bit of discussion on IRC I have decided to work on a Python script for merging images as height maps and terrain maps, it will not do anything else mind you. Now the proposed method of doing this is as follows:
Create an empty map in the editor, setting up the dimensions and terrain type, then saving it uncompressed.
Enter command in the script's directory python wmf_merge.py "path/map.wmf" "path/heightimage.png" "path/terrainimage.png"
Load the map into the editor to add in the details.
The purpose of this is to make using real world lands easier as well as offer an easier and faster alternative for the primary layout design. Hopefully it will encourage more maps, though I came up with the idea because I want to do a campaign for the ships once the other features of seafaring are implemented. Any ideas or suggestions to perhaps make this a bit more robust.
Note: Some things will be impossible to merge with this sort of script, like player locations, because the script will use subpixel locations and averaging terms for determining actual values so the map and image can be different sizes.
Edit: Here it is, if there is interest I'll open a Sourceforge page for it.
If your browser doesn't recognize the file type, right click on the link itself then "save as."