the barrio # 2 of Latina (Ciudad) [http://opengeofiction.net/relation/718] was planed for 100 990 inhabitants on the 12,43 km² - means moderate 8982 inhabitants each km². Meanwhile roundabout 3090 houses there are buildt - most with 4 floors and ground floor and 12 or 24 flats in a house. Only few houses are smaller. So we can calculate 3090 * 15 flats are 46 350 flats in all. Let in each live 4 persons as average, so we get 185 400 possible inhabitants = 14 500 each km² (I hope, I did not miscalculate me).
O.k. - that is only a rough calculation. But it is to see, that 100 990 inhabitants are too few for this central dense urbanisated area. So now I set 170.990 for this area. Sure the "new" 70 000 inhabitants will be substracted in other barrios, to let the total inhabitants of Latina (Ciudad) on the same level.
So we can see, that the planed inhabitants can be fixed only after the step, that all houses are drawn