Name
ST_ShiftLongitude — Shifts the longitude coordinates of a geometry between -180..180 and 0..360.
Synopsis
geometry ST_ShiftLongitude(geometry geom);
Descrizione
Reads every point/vertex in a geometry, and shifts its longitude coordinate from -180..0 to 180..360 and vice versa if between these ranges. This function is symmetrical so the result is a 0..360 representation of a -180..180 data and a -180..180 representation of a 0..360 data.
![[Note]](../images/note.png)
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This is only useful for data with coordinates in longitude/latitude; e.g. SRID 4326 (WGS 84 geographic) |
![[Warning]](../images/warning.png)
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Pre-1.3.4 bug prevented this from working for MULTIPOINT. 1.3.4+ works with MULTIPOINT as well. |
Questa funzione supporta il 3d e non distrugge gli z-index.
Miglioramento nella version 2.0.0: introdotto il supporto per superfici poliedriche e TIN.
NOTE: this function was renamed from "ST_Shift_Longitude" in 2.2.0
Questa funzione supporta le Polyhedral Surface.
Questa funzione supporta i Triangoli e le Triangulated Irregular Network Surfaces (TIN).
Esempi
--single point forward transformation
SELECT ST_AsText(ST_ShiftLongitude('SRID=4326;POINT(270 0)'::geometry))
st_astext
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POINT(-90 0)
--single point reverse transformation
SELECT ST_AsText(ST_ShiftLongitude('SRID=4326;POINT(-90 0)'::geometry))
st_astext
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POINT(270 0)
--for linestrings the functions affects only to the sufficient coordinates
SELECT ST_AsText(ST_ShiftLongitude('SRID=4326;LINESTRING(174 12, 182 13)'::geometry))
st_astext
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LINESTRING(174 12,-178 13)