Drawing districts is difficult. There are many factors to be taken into account:
- Number of cells on a map: ranges from 150-1000 cells.
- Number of cells within a city: usually 1/3rd of the map cells.
- Number of districts: ranges from 0 to 20
- Max percentage of city covered in districts: If your city has a market, education and arena, you need to reserve some part for "everything else".
- Max percentage of city covered by one district: If your city has 2 districts, can one be 100% of the city? of course not.
- Number of cells in a district: how many cells are in each district, given the limitations above?