The major factors in the type of settlement are: location of water sources, organisation of agriculture and landholding, and likelihood of flooding. For example, in areas such as the Lincolnshire Wolds, the villages are often found along the spring line halfway down the hillsides, and originate as spring line settlements, with the original open field systems around the village. In northern Scotland, most villages are planned to a grid pattern located on or close to major roads, whereas in areas such as the Forest of Arden, woodland clearances produced small hamlets around village greens. Because of the topography of the Clent Hills the north Worcestershire village of Clent is an example of a village with no centre but instead consists of series of hamlets scattered on and around the Hills.