<sect1 id="PostGIS_GeographyFunctions">\r
<title>PostGIS Geography Support Functions</title>\r
<para>The functions and operators given below are PostGIS functions/operators that take as input or return as output a <link linkend="PostGIS_Geography">geography</link> data type object.</para>\r
+ <note><para>Functions with a (T) are not native geodetic functions, and use a ST_Transform call to and from geometry to do the operation. As a result, they may not behave as expected when going over dateline, poles, \r
+ and for large geometries or geometry pairs that cover more than one UTM zone. Basic tranform - (favoring UTM, polar stereographic and falling back on mercator in worst case scenario)</para></note>\r
<itemizedlist>\r
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