My map has several hundred markers within a city. Usually no more than a 20 mile radius. I\'ve read through the documentation and haven\'t found a way to set the init to automat
See this other SO answer about using javascript's setInterval
function to create a periodic function that calls panBy
on your map: Can Google Maps be set to a slow constant pan? Like a globe revolution?
This can be used to pan the map by x pixels on each call to panBy, allowing you to slow down the panBy rate (since you are only telling gmaps to panTo a short distance).