Glacier Body of land ice that consists of recrystallized snow accumulated on the surface of the ground and moves slowly downslope (WSP-1541A) over a period of years or centuries. Since glacial sites move, the lat-long precision for these sites is usually coarse. Glacier 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.