Calendar Planner comes with out-of-the-box support for Google Maps, which will let you geo-tag your events and show them on a map.
Assigning a location to an event is the easiest thing to do. You just need to start typing the name of the place, and the form will automatically suggest you locations based on what you're typing, providen by Google Maps API. When you find the location you're looking for, simply click enter and the form will import all relevant data, like Location's name, short name, latitude and longitude, and will show the pin on a map
Start typing for suggestions
Click enter to assign the location
Show events on a map
Using the Map view for events, you can show all upcoming events on a map