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Tag: para
Returns <varname>TRUE</varname> if this <varname>LINESTRING</varname> is both <xref linkend="ST_IsClosed"/> (<code>ST_StartPoint(g) ~= ST_Endpoint(g)</code>) and <xref linkend="ST_IsSimple"/> (does not self intersect).
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Tests if a geometry is empty.
 
Returns true if this Geometry is an empty geometry. If true, then this Geometry represents an empty geometry collection, polygon, point etc.
 
SQL-MM defines the result of ST_IsEmpty(NULL) to be 0, while PostGIS returns NULL.
SQL-MM вызначае вынік <code>ST_IsEmpty(NULL)</code> як 0, у PostGIS вяртаецца <varname>NULL</varname>.
&sqlmm_compliant; SQL-MM 3: 5.1.7
&sqlmm_compliant; SQL-MM 3: 5.1.7
Changed: 2.0.0 In prior versions of PostGIS ST_GeomFromText('GEOMETRYCOLLECTION(EMPTY)') was allowed. This is now illegal in PostGIS 2.0.0 to better conform with SQL/MM standards
Змены: 2.0.0 - раней дапускаўся ST_GeomFromText('GEOMETRYCOLLECTION(EMPTY)'). Цяпер гэта забаронена для лепшай адпаведнасці SQL/MM.
Tests if Polygons have exterior rings oriented counter-clockwise and interior rings oriented clockwise.
 
Returns true if all polygonal components of the input geometry use a counter-clockwise orientation for their exterior ring, and a clockwise direction for all interior rings.
 
Returns true if the geometry has no polygonal components.
 
Closed linestrings are not considered polygonal components, so you would still get a true return by passing a single closed linestring no matter its orientation.
 
If a polygonal geometry does not use reversed orientation for interior rings (i.e., if one or more interior rings are oriented in the same direction as an exterior ring) then both ST_IsPolygonCW and ST_IsPolygonCCW will return false.
Калі ўнутраныя кальцы не процілеглай арыентацыі (супадаюць з знешнім), то і ST_IsPolygonCW, і ST_IsPolygonCCW вернуць false.
Availability: 2.4.0
Даступнасць: 2.4.0
, <xref linkend="ST_ForcePolygonCCW"/>, <xref linkend="ST_IsPolygonCW"/>
, <xref linkend="ST_ForcePolygonCCW"/>, <xref linkend="ST_IsPolygonCW"/>
Tests if Polygons have exterior rings oriented clockwise and interior rings oriented counter-clockwise.
Правярае, ці знешнія кальцы па гадзіннікавай, а ўнутраныя - супраць.
Returns true if all polygonal components of the input geometry use a clockwise orientation for their exterior ring, and a counter-clockwise direction for all interior rings.
 
Tests if a LineString is closed and simple.
Правярае, ці LINESTRING замкнёны і просты.
Returns <varname>TRUE</varname> if this <varname>LINESTRING</varname> is both <xref linkend="ST_IsClosed"/> (<code>ST_StartPoint(g) ~= ST_Endpoint(g)</code>) and <xref linkend="ST_IsSimple"/> (does not self intersect).
Вяртае TRUE, калі <varname>LINESTRING</varname> адначасова <xref linkend="ST_IsClosed"/> (<code>ST_StartPoint(g) ~= ST_EndPoint(g)</code>) і <xref linkend="ST_IsSimple"/> (не мае самаперасячэнняў).
&sqlmm_compliant; SQL-MM 3: 7.1.6
&sqlmm_compliant; SQL-MM 3: 7.1.6
SQL-MM defines the result of <code>ST_IsRing(NULL)</code> to be 0, while PostGIS returns <varname>NULL</varname>.
SQL-MM вызначае вынік <code>ST_IsRing(NULL)</code> як 0, у PostGIS вяртаецца <varname>NULL</varname>.
, <xref linkend="ST_IsSimple"/>, <xref linkend="ST_StartPoint"/>, <xref linkend="ST_EndPoint"/>
 
Tests if a geometry has no points of self-intersection or self-tangency.
 
Returns true if this Geometry has no anomalous geometric points, such as self-intersection or self-tangency. For more information on the OGC's definition of geometry simplicity and validity, refer to <link linkend="OGC_Validity">"Ensuring OpenGIS compliance of geometries"</link>
 
SQL-MM defines the result of ST_IsSimple(NULL) to be 0, while PostGIS returns NULL.
 
&sqlmm_compliant; SQL-MM 3: 5.1.8
 
Returns the M coordinate of a Point.
 
Return the M coordinate of a Point, or NULL if not available. Input must be a Point.
 
This is not (yet) part of the OGC spec, but is listed here to complete the point coordinate extractor function list.
 
&sqlmm_compliant;
 
, <xref linkend="ST_X"/>, <xref linkend="ST_Y"/>, <xref linkend="ST_Z"/>
 
Returns the amount of memory space a geometry takes.
 
Returns the amount of memory space (in bytes) the geometry takes.
 
This complements the PostgreSQL built-in <link xlink:href="https://www.postgresql.org/docs/current/functions-admin.html#FUNCTIONS-ADMIN-DBOBJECT">database object functions</link> pg_column_size, pg_size_pretty, pg_relation_size, pg_total_relation_size.
 

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Translation uploaded

  1. postgis
  2. PostGIS Manual
  3. Belarusian
Returns <varname>TRUE</varname> if this <varname>LINESTRING</varname> is both <xref linkend="ST_IsClosed"/> (<code>ST_StartPoint(g) ~= ST_Endpoint(g)</code>) and <xref linkend="ST_IsSimple"/> (does not self intersect).
Вяртае TRUE, калі <varname>LINESTRING</varname> адначасова <xref linkend="ST_IsClosed"/> (<code>ST_StartPoint(g) ~= ST_EndPoint(g)</code>) і <xref linkend="ST_IsSimple"/> (не мае самаперасячэнняў).
2 days ago
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  1. postgis
  2. PostGIS Manual
  3. Belarusian
Returns <varname>TRUE</varname> if this <varname>LINESTRING</varname> is both <xref linkend="ST_IsClosed"/> (<code>ST_StartPoint(g) ~= ST_Endpoint(g)</code>) and <xref linkend="ST_IsSimple"/> (does not self intersect).
 
2 weeks ago
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Glossary

English Belarusian
LINESTRING Glossary
ST_EndPoint Glossary
ST_IsClosed Glossary
ST_IsSimple Glossary
ST_StartPoint Glossary

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Source string description
Tag: para
Flags
no-c-format
String age
2 weeks ago
Last updated
2 weeks ago
Source string age
2 years ago
Translation file
doc/po/be/postgis-manual.po, string 1532