Land A location on the surface of the earth that is not normally saturated with water. Land sites are appropriate for sampling vegetation, overland flow of water, or measuring land-surface properties such as temperature. (See also: Wetland). Land Sites Adapted from USGS Site Types. http://wdr.water.usgs.gov/nwisgmap/help/sitetype.html ODM2 SiteType Controlled Vocabulary ODM2 Working Group A vocabulary for describing the type of a data collection Site. To some extent, these types represent the ultimate feature of interest that the site was established to measure. For example, a Stream Site was established to measure properties of a Stream.