Potrero Hill has a North and a South Slope, with the North Slope generally more coveted due to its proximity to downtown. There is no clear dividing line between North and South as there are hill apexes in various places. The demographics of the two are mostly similar with the exception of two public housing projects (Potrero Terrace and Potrero Annex) situated on the South Slope. The projects occupy over one third of the South Slope. The poorly designed, curvy and diagonal grids of the housing projects isolate their residents from the greater neighborhood.