# How or where to find out how many percent of the Earth's surface is above/below a certain altitude?

I wonder whether there's a way of learning how much of the Earth's surface is above or below a certain altitude (land on air only, i.e. excluding seas and oceans and land underwater).

E.g. the lowest/deepest point of the Earth's surface on land is the shore of the Dead Sea at 1355 ft below sea level standard. So above 1356 ft (413.3 m) below sea level 100% of the Earth's surface there are. The highest point of the Earth's surface is the summit of Mt Everest so 100% of the Earth's surface are within 29,032 ft (8849 m) above sea level. Now if I wanted to know how much of the Earth's surface is within say 10,000 ft (3048 m) above sea level, is there a good way to find out?

• Maybe more challenging than it sounds? You'd have to use a full elevation dataset of the world and gather the elevation frequencies for every location. A computationally intensive project perhaps? Commented Dec 17, 2022 at 6:36
• @JeopardyTempest I think one needs a topographic map or something. Commented Dec 17, 2022 at 7:01
• Interesting point, I suppose that does shortcut the compiling of the frequency, as it sort of already does that. Think one could reasonably use a GIS package to calculate the area in each topographic layer then, smart thinking. Commented Dec 17, 2022 at 7:09