On Aug 17, 1:12 pm, eladzaa <[email protected]> wrote:

> I've read the documentation but still have some questions. Thanks for
> answers to some of them and/or links to answers.

I think almost all of the questions are answered either in the
documentation or the FAQ (http://code.google.com/apis/maps/faq.html)

> 1. Can you detect and launch an event when the user moves the map by
> click and press on some point and move the mouse? I want to know if
> I'll be able to switch the visibility of GMarkers according to the
> map's visible area to the user and according to the zoom level.

This operation is called dragging. There are drag* event listeners.

> 2. Is there maximum amount of different routes (created from a
> GDirections object) that you can display on one map? Is there maximum
> amount of different points that you can add to a single route?

Theoretically, no. Practical maximum depends on the browser. More
routes/points per route will degrade browser performance.

> 3. Can any 2 (lat,lng) points be connected in a route? If no, in which
> cases (when there is no highway between 2 points, when there is an
> ocean between 2 points, etc.)?

Obviously the routing engine can only find routes where one actually
exists. It will find a route from A to B if A and B are within a
certain distance of a navigable road and a route actually exists.

The routing engine does use the Channel Tunnel between England and
France and can use ferries. Directions are not available in all
territories.

> 4.Is there any limitation of the number of queries that a site can
> request per a time unit?

Yes. This is an FAQ: 15000/day. There is a maximum rate too which is
faster than the average of 15000/day, but that rate limit isn't
published and appears to vary depending on server load.

> 5. Are there any differences between using maps.google.com and using
> the api?

Yes. The API doesn't have all the built-in functionality of
maps.google.com, although all (or almost all) the functionality can be
built using the API.

> 6. What is the main difference between api v2 and v3? Should I
> consider working with v3 and is there any capabilities it isn't
> supports?

Version 3 is a lightweight API designed principally for mobile
devices. It is very different from v2 and has its own Group (see the
Posting Guidelines for a link). It's very much in Beta.

Andrew
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