The horizon is the border between [[earth (planet)|]] and [[sky]]. As the horizon is usually obscured by trees, mountains, buildings, etc., it is most visible in settings dominated by the [[ocean]] or other [[desert|featureless]] [[field|terrain]].

When the outline of a city is visible over the horizon, this is known as a [[skyline]].

If the horizon is tilted with respect to the picture frame, the result is a [[dutch angle]].

h4. See also

* [[Mountainous horizon]]
* [[Tag group:Image Composition]]
地平線 地平线 水平線 水平线