also: です
noun
spit of land; sandspit
A narrow point of land extending into a body of water, formed by deposition. A geographical term.
この海岸には長い出洲が伸びている。
A long spit of land extends from this coast.
地図で見ると、出洲の先端に灯台がある。
Looking at the map, there is a lighthouse at the tip of the sandspit.
Variant kanji spelling; 州 is a common simplification of 洲.
Alternate reading; may be confused with the copula です.
砂嘴 is a more technical term for a sandspit, while 出洲 is a less common, perhaps more literary or descriptive term.
Compound of 出 (de, 'protruding') and 洲 (su, 'sandbank, shoal'). The reading です is a variant, possibly influenced by rendaku or dialect.