One of the main aims of urban planning in Europe since the 1980’s has been to avoid a destruction of the soul of the historical areas through the insertion of large scale offices. This is something that can be quite controversial, as in some areas it has led to no offices but no population either. In Madrid we can see a minute mix of uses. In many cases GIS would not return a value as it is a division by zero (and here I can hear residents of the area, as some lots have clearly a lot of offices, but the fact is that cadastral data considers them other uses). This is somehow as mixed as uses can get in Madrid.