Maps of the Netherlands with Rough Indications of the Sites to Be Photographed, Reinjan Mulder, 1971
This is a schematic map of the Netherlands with an overlaid grid on the basis of which Mulder determined the sites to photograph for his Objective Netherlands project. The intersections of the grid are found in specific topographic maps, here indicated as a red area. The official numbers of the topographic maps are on the map with text.