I have a website that is hand written in HTML5 and CSS.
I want to include a map on a single page with the functionality of a CMS, without converting the whole site to the CMS - so essentially I am looking for a map module/plug-in and a CMS to run the map.
I anticipate that I will need to create a blank page/article and use an iframe to embed the map within the HTML of my page.
Can you see an issue with your map extension and Joomla accomplishing this. (I realise this question covers more than the simple implementation of your extension.)

The extension needs to
[ul]
[li]display a simple Google Map[/li]
[li]load quickly[/li]
[li]display 5,000 - 10,000 unique markers[/li]
[li]allow a callout that displays an image, text and URL link[/li]
[li]cluster multiple markers in close proximity to each other[/li]
[li]be stable in operation[/li]
[li]be secure from hacks[/li]
[li]allow a visitor to add a new marker to the map by entering co-ordinates or by drag and drop[/li]
[li]allow a visitor to add a new marker to the map by entering the name of a location[/li]
[li]allow a visitor to select that new marker from a number of different markers ie; a legend displaying different markers for different categories[/li]
[li]give directions from a point on the map to a marker[/li]
[li]give directions from one marker on the map to another marker[/li]
[li]allow a visitor to add an image, description and URL link to the new marker[/li]
[li]notify me when a visitor has added a new marker[/li]
[li]allow me to add dozens or hundreds of new markers all at once[/li]
[li]allow a visitor to add a new marker without having to register[/li]
[/ul]

Sorry for all the questions but I'm looking to commit to a CMS as well as a map extension and I need to get it right first time.
Using Joomla or any other CMS to accomplish this doesn't thrill me but I don't see any other way out without lots of hand coding JS.
If you know of another way to implement your extension into a HTML site I'd like to hear about it.

Regards C