In a map, I have lat & long as dimensions and I get incorrect percentiles computed. When lat and long are measures, there's no issue. I don't understand why it's wrong. You will see in the tab, compare box that the same zip is put in two different percentiles. I editing the calc to compute using zip, lat, and long and I get the wrong percentiles computed. I did a case study (percentile1,2,3) in this same workbook to show that the ID (zip) should be able to compute using several fields and always give the correct answer. Any thoughts?