Nusatenggara means the southeastern islands. It’s a 1500 km long island range, with a surface of 88,500 km2.
The northern islands are a continuation of the volcanic chain which runs from Sumatra to the Molucca island Banda. They are much more mountainous than Sumatra and Java and have little arable ground. The Southern islands are not volcanic.

The geographic of Lombok.
Lombok has a surface of 4739 km2. The distance from North too south amounts 80 km and from west to the east the island is 70 km breit. Geographically lombok can be classified in four areas. Exactly like Bali is lombok dominated by volcanic mountains in the north of the island. This forms a link in the chain of still active volcanos on Nusa Tenggara. In the centre of the mountains lies the 3800 meters high Rinjani one of the highest volcanos of Indonesia.
The second area is located north of the mountains. It is a narrow counterfoil country, which shows savanne-like landscape and a extreem low, season-tied know rain fall. In the middle of lombok, at the south of the mountains, lies the third area: an exceptionally fertile
lower plain. Especially the western part of this, fed by mountainrivers and natural sources is very suitable for wet rice construction. In this prosperous area lies also the three large cities of lombok. The fourth area is a west in the direction of the island Nusa Penida at bali extends himself. Here the landscape very dry. There is hardly flowing water that is why it is a poor and thinly populated area.

The geographic of Sumbawa
With 15,260 km2 is the island three times as bigger as its neighbour Lombok. From East to West the island is 272 km long, from north to south on its largest breadth it's 95 km. The capricious form of the island is the consequence of enormous volcano breaking out in the past, from which Tambora is the most known.