标准编号:ISO 19162:2015
中文名称:地理信息 坐标参考系统熟知的文本表示
英文名称:Geographic information — Well-known text representation of coordinate reference systems
发布日期:2015-08
标准范围
This International Standard defines the structure and content of a text string implementation of the abstractmodel for coordinate reference systems described in ISO 19111:2007 and ISO 19111-2:2009. The stringdefines frequently needed types of coordinate reference systems and coordinate operations in a selfcontainedform that is easily readable by machines and by humans. The essence is its simplicity; as aconsequence there are some constraints upon the more open content allowed in ISO 19111:2007. To retainsimplicity in the well-known text (WKT) description of coordinate reference systems and coordinate operations,the scope of this International Standard excludes parameter grouping and pass-through coordinate operations.The text string provides a means for humans and machines to correctly and unambiguously interpret andutilise a coordinate reference system definition with look-ups or cross references only to define coordinateoperation mathematics. Because it omits metadata about the source of the data and may omit metadata aboutthe applicability of the information, the WKT string is not suitable for the storage of definitions of coordinatereference systems or coordinate operations.