Data can be filtered by using a radius from a certain location.  The nearby filter can be used by following these steps when creating a map:

1. Click ‘Show Advanced Options‘
2. Enable ‘directions & nearby filter‘ (see Image)
3. Update or create the map, then save the map.

To Use the nearby filter on the map follow these steps:

1. Click ‘More Options‘ in the upper left
2. Click the ‘Nearby‘ link

A video to demo adding a radius filter and exporting