Hi All,

I am new to google map api. first, I have read the instruction for
posting new discussion, but I haven't even started writing a script
yet so there is no url I can post. I did search the group for
discussions related to my questions, but didn't get any useful
results.

I read the official basics api guide and several pages after, and it
seems to me that instead of defining boundary coordinates in a map, I
would define the central coordinate and the zoom level. Is there a way
to back out the boundary coordinates (or any information that allows
me to backtrack the coordinates of the four corners?)

And here's a random/newbie questions about markers. I am trying to
create a map which shows markers to my geotagged pictures. Is there a
good way to still show all the pictures if they are geotagged at
exactly the same coordinates? I am thinking about something like
google earth where multiple thumbnails would appear when a single
marker is clicked, but I haven't seen such an application for maps on
the web. I am not expecting any detailed codes, but just some
guidelines/tips so that I can start trying myself.

Thanks much in advance!

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