So I'm developing a web app that will display data on a map with GIS technology. I need to use Leaflet to draw stuff, and the web app will most likely be single page, like this: http://www.fiveninetyone.com/final/ . I will also need to do some analysis, but the result of that will also be datapoints displayed on the map.

Now I am not sure about differences between the two. It seems Web Api is what I want, since then I can use stuff like Angular for front end, but then I read some recent posts that "MVC 6 kills Web Api" etc. And what if I need more than 1 page, will this render Web Api approach unusable? I have so many questions, I have never developed a proper web app.

If it helps, my DB will be SQL, and would very much prefer to use Entity Framework, which is the reason I didn't choose Node.js or Django (was I right not to?)

So which one should I use? It has to "support" Leaflet though.