So, the regions are defined by upper left, and lower right corner, with 0,0 - 100,100 being the whole map.
Lets mark upper left coordinates as x1,y1 and lower right as x2,y2. After rotation - clockwise, the new coordinates are X1,Y1 and X2, Y2
X1 = 100-y2
Y1 = x1
X2 = 100-y1
Y2 = x2