A facility or location at which observations have been collected. A site may have instruments or equipment installed and may contain multiple other sampling features (e.g., a stream gage, weather station, observation well, etc.). Additionally, many specimen sampling features may be collected at a site. Sites are also often referred to as stations. A site is represented as a point, but it may have a geographical footprint that is not a point. The site coordinates serve as a reference for the site and offsets may be specified from this reference location.