[Google Maps API v3] Using googlemap feature NOT for the map

Hi everyone I want to use googlemap feature to develop a special family tree displaying picture overlay of every branch of the family using zoom for changing picture and dig deeper in the descending child tree .. First... is it DoAble ? What is the difference between ground overlay, custom overlay

[Google Maps API v3] Google Maps Directions API Usage Limits

What is the limit of allowed waypoints in the free plan of Google Maps Directions API? Their site indicates this: Up to 23 waypoints allowed in each request containing an API key, or up to > 8 waypoints when no API key is supplied, or up to 8 waypoints when using > the Directions service in the