Pavement A surface site where the land surface is covered by a relatively impermeable material, such as concrete or asphalt. Pavement sites are typically part of transportation infrastructure, such as roadways, parking lots, or runways. 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.