I haven't touched GIS stuff in ages but last I worked with maps they were bought by the corporation and not quite cheap from what I've heard. So I totally don'

I haven't touched GIS stuff in ages but last I worked with maps they were bought by the corporation and not quite cheap from what I've heard. So I totally don't see somebody uploading the map to your server, not to mention they were rather huge, so not the kind of file you attached to an email. This really needs to be some desktop tool although I see why you would do it as a website (no piracy).