Geography of Kazakhstan with an elevation of 7,010 meters, or 22,999 feet above sea level; the lowest point is the bottom of the Karagiye depression at 132 meters, or 433 feet below sea level, in the Mangystau province east of the Caspian Sea. Most of the country lies at between 200 and 300 meters above sea level, but Kazakhstan's Caspian shore includes some of the lowest elevations on Earth. The peak Khan Tengri in the Tian Shan Mountains (and on the border with Kyrgyzstan and China) is Kazakhstan highest elevation at 6995m (7010m with ice cap). Many of the peaks of the Altay
Sea level part of Africa as official sea level. Elsewhere in Europe vertical elevation references (European Vertical Reference System) are made to the Amsterdam Peil elevation, which dates back to the 1690s. Satellite altimeters have been making precise measurements of sea level since the launch of TOPEX/Poseidon in 1992. A joint mission of NASA and CNES, TOPEX/Poseidon was followed by Jason-1 in 2001 and the Ocean Surface Topography Mission on the Jason-2 satellite in 2008. "Height above mean sea level" ("AMSL") is the elevation (on the ground) or altitude (in the air) of an object, relative to the average sea level datum.