All honor of the online solution goes to my friend/genius Brian Suda: http://www.suda.co.uk, though I worked with him on the design and supplied data. 3d,drawing+painting+coding=you don´t wanna know, I tend to shock most customers with initial estimates, which is why most of the projects are self initiated, like this one.

Yes I can imagine that is expensive. But I was just wondering if this kind of software was possible in, per example, cities with "less stable economies", once I know that is expensive and take a lot of hours working on all this details.

yes of course, we´ve used this map zoom solution on a number of our own projects and for different clients. There´s a beautifully simple admin system behind it to add and edit points etc.