The Control Panel
Most operations will be done by using this control panel. The panel will floating steady in you browser so that you don't need to go back and forth to find the control bars if you move around/zoom the map.
The first slider bar with two sliders can be used to view specific deaths on the map by selecting a window of age.
The second slider bar with two sliders can be used to view specific deaths on the map by selecting a window of date.
Checkboxes can be used to view map by different gender, both or none.
Zoom In / Zoom Out buttons are obvious.