I found 3 little problems on this map
.
1- The Houses. In the north of caen the Caen stone is very used especially in the little village which have lot of old houses.
There is no granite house, but many of them have of filler of ciment in the walls.
2-The Church. There is NO church at Lebisey
. The only church near Lebisey is at Montmorency and it look like that.
You can see a typical house with filler on the left, maybe the old city hall.
3-The Manor at headquarters. I think the color isn't really realistic. Maybe white or Off-white (right?) would have been true.
This my little feedback take it like you want.