Name
ST_ShiftLongitude — Shifts the longitude coordinates of a geometry between -180..180 and 0..360.
Synopsis
geometry ST_ShiftLongitude(geometry geom);
설명
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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1.3.4 미만 버전에서는 버그 때문에 멀티포인트를 입력받지 못 했습니다. 1.3.4 버전부터 멀티포인트도 입력할 수 있습니다. |
This function supports 3d and will not drop the z-index.
개선 사항: 2.0.0 버전부터 다면체 표면(polyhedral surface) 및 TIN을 지원합니다.
주의: 2.2.0 미만 버전에서, 이 함수의 명칭은 "ST_Shift_Longitude"였습니다.
This function supports Polyhedral surfaces.
This function supports Triangles and Triangulated Irregular Network Surfaces (TIN).
예시
--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)