The height of mountains on Earth are measured from sea level, but what reference point is used for planets with no seas like Mars? - Quora
![The Measure of a Mountain: Beauty and Terror on Mount Rainier: Amazon.co.uk: Barcott, Bruce: 9781570615214: Books The Measure of a Mountain: Beauty and Terror on Mount Rainier: Amazon.co.uk: Barcott, Bruce: 9781570615214: Books](https://m.media-amazon.com/images/I/61soTmTkmjL._AC_UF894,1000_QL80_.jpg)
The Measure of a Mountain: Beauty and Terror on Mount Rainier: Amazon.co.uk: Barcott, Bruce: 9781570615214: Books
![Do you know? How to measure the altitude of the mountains? Altitude is measured from the sea level. Sea level is an average level of surf… | High, Sea level, World Do you know? How to measure the altitude of the mountains? Altitude is measured from the sea level. Sea level is an average level of surf… | High, Sea level, World](https://i.pinimg.com/1200x/2e/52/63/2e5263c7aa1191dbb447e00895e52683.jpg)