Once users have selected a map scale for exploration, they can activate individual landscape areas or buildings, i.e. they can search spatially. And they can do this making complex and robust relationships:

Users can mouse over the screen and individual elements will be identified by a pop-up window.

They can specify their searches by date ranges (see bottom bar).

They can specify themes:
Made Land
Cultural Patina
Underground Skeleton

as well as individual types within these categories.

Finally, users can further articulate queries by Event Class:

Political + Official

To simulate this on a very simple level, click on Simmons College.

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