Eastern Province topographic maps

The desert is 1,000 kilometres (620 miles) long, and 500 kilometres (310 miles) wide. Its surface elevation varies from 800 metres (2,600 ft) in the southwest to around sea level in the northeast. The terrain is covered with sand dunes with heights up to 250 metres (820 ft), interspersed with gravel and gypsum…

Average elevation: 183 m

Average elevation: 161 m

Average elevation: 287 m

Average elevation: 8 m

Average elevation: 8 m

Average elevation: 33 m