hello if you wanna greate a realistic lookin new york i give you an tip, this tip is for the other members to :-)
all you need is to download a NYC map made by Menno
i tooked the map with hole staten Island on it
the map is 40 X 40 or 10 x 10 Large city
in the first time u think its realistic but if u want build all 51 blocks that runs south to north at the central park and all 25 blocks from the central park to the empire state building, and all other block, you came to a point that the north - south strech of Manhatten is to small
but if u want that it looks realistic you must change this south north stretch in photoshop or something to 52 x 40 Pixel or High 52 x Wide 40 Pixel
now you have a map with 13 big cities from the south to the nord and 10 cities from east to west
so you can easily put all 200 or more blocks from manhattan in the game with a size of 4 tiles on each block from south to north and the wide of the block is changing sometimes from 9 over 13 and 11 tiles from the upper eastside to the upperwestside the 13 tiles wide block is important for the rockefeller center its 13 x 4 tiles wide
so good luck
and sorry for my bad english
ICH BIN DEUTSCHER / I