The map doesn't seem to work for me. When I hit view it goes back to dates and archies filters.
Happy Hockey
Also, the filters are subtractive (so to speak). When you uncheck a box, all of the matching points disappear. And if there are no matching points to plot, the map section doesn't display (not even a blank map).
So, make sure (All) is selected for Architects and Year.
If you want to see only courses in a certain year: leave the Architect (All) selected, uncheck Year (All), then check the specific years you want to see.
Likewise to see all of the courses by an architect, make sure the Year (All) is selected, then unselect the Architect (All), then select the specific architect check boxes.
In each of these scenarios, when you uncheck (All), the map area will go blank. When you then start checking specific boxes the map will re-draw, and do so with a focus that captures only the selected courses.