Dunes and People - Dune Worlds: How Windblown Sand Shapes Planetary Landscapes - page 263

Fig. 23.4 Image from the International Space Station of the villages
and plantations in the Liwa Oasis, United Arab Emirates. The
megabarchans here (see also Fig. 7.16 ) are about 2 km across, and if
you look closely, you'll see the southern slip faces of the dunes

generally define a sharp northern edge to the plantations, while the
southern side of the plantations is often irregularly-placed in the
sabkha between the dunes. Image NASA/JSC/EOL