The Tampa Bay data has a weird outlier that it making the map kind of useless: https://kwelia.com/maps/cbsa_census_tract?cbsa=Tampa-St.%20Petersburg-Clearwater

The Tampa Bay data has a weird outlier that it making the map kind of useless: https://kwelia.com/maps/cbsa_census_tract?cbsa=Tampa-St.%20Petersburg-Clearwater,%20FL# https://kwelia.com/maps/cbsa_census_tract?cbsa=Tampa-St.%20P... Notice the one red spot at the top level, and everything else falling within the first 3 levels, which are 30% each. If the data is correct, perhaps the algorithm to pick the scaling factors could be improved to ignore outliers at the top and bottom?