Drilling within a map using a calculated dimension
Edit the layer expression
QlikMaps 2.1 introduced true multilayer support, with multiple layers displayed on a map at once. To do this, you'll use an expression similar to:
=IF(COUNT(DISTINCT TOTAL YourValue) < 500, 'ObjectID', '')
Note: This example uses a Polygon object for the high-level view and adds a Points object for the detailed view, but you can use any combination of Points/Polygon objects in your Multilayer object.