Orthophotos, medium scale, black and white, recording 1997-2000

Digital black and white orthophotos of Flanders and Brussels, aerial shot spread over 4 years with flight scale 1/53,000 in 1997 or 1/52,000 in 1998-2000, georeferenced in the Lambert 72/50 coordinate system and cut into squares of 2 by 2 km with ground resolution 1 m.