This is the country of Nebrinn on the east coast of Esper. It is a patchwork of duchies, counties, baronies etc. who are all more or less vassals of one of the great noble houses - Aradas (yellow), Barnav (green), Tamar (blue) and Lykin (red) or they are dioceses of the Mabedian Church (orange). The grey areas are either smaller noble houses who managed to remain independent or they are free cities or - in case of Kam and Karan - are territories directly administered by the state. It's just wilderness, mountains and swamps waiting to be colonized and "civilized". By now those territories are just being claimed by the state of Nebrinn and nobody else bothered to disagree.
I tried to give the map a somehow "authentic" 17th century look. There was alsop a phase in the progress of mapmaking where I added some mountains and forrests, but I decided that all this would be too much so I left them out again.