Generating CITIES - any straightforward strategies without crashing?

Hi, I would lile to generate a 3D model of the whole city of Vienna, but my computer doesn’t seem to hold more than 1000 meters of data.

I figured out a tehcnique: Divide the city to longitude and latitude locations that would form a 20km * 20 Puzzle like grid. But I needed to know how does meters translate to coordinates…

Then Ifound this thread on stackflow on how to calculate new longitudes/latitudes from old ones (Lat/long + n Meters) https://stackoverflow.com/questions/7477003/calculating-new-longitude-latitude-from-old-n-meters - But I couldn’t translate it into a grasshopper script…

This would be of great help if someone can make it work for it would be a nice thread to this pulgin’s community.

Cheers,