Column Formulas
Enter a formula for each column on a separate line. Use simple distances in multiples of 5 (km) up to 200 km. Or enter formulas like "25km/50km". Variables must be of that form: #km where the number is a multiple of 5 up to 200. Use +, -, *, /, ^, (), sqrt, min/max, and other constants.
Sort/Filter
Click a column header to sort by that column. Click again for reverse sort.
Click a cell to filter by that value.
Clicking a country will limit to that country. Click again to remove the filter.
Clicking a population value will show any cities with at least that value. Clicking a different value in that column will set a max value. Clicking again removes the filter.
Data is in millions of people. Data comes from https://sedac.ciesin.columbia.edu/data/collection/gpw-v4 and is based on squares about 5km wide so it isnt very accurate at small radii. The 200 cities are a somewhat arbitrary but geographically diverse collection of large cities.