16.20 - Usage Notes - Teradata Database - Teradata Vantage NewSQL Engine

Teradata Vantageā„¢ Geospatial Data Types

Product
Teradata Database
Teradata Vantage NewSQL Engine
Release Number
16.20
Release Date
March 2019
Content Type
Programming Reference
Publication ID
B035-1181-162K
Language
English (United States)
  • The ST_IsValid method can be used to validate converted 2D geometries that were not validated by Make_2D.
  • If the input geometry is already a 2D geometry value, this value is returned unchanged by this method.
  • A well-formed 3D geometry value can become invalid during a 3D to 2D conversion. For example, if a 3D polygon lies in a plane parallel to the y axis, its line segments will self-intersect. Make_2D does not attempt to change the geometry type of the converted geometry from polygon to linestring to account for this, and an invalid 2D geometry can result.