PostGIS 1.5.1 Manual267 / 315

Synopsis

float ST_YMax(box3d aGeomorBox2DorBox3D);

Description

Returns Y maxima of a bounding box 2d or 3d or a geometry.

NoteAlthough this function is only defined for box3d, it will work for box2d and geometry because of the auto-casting behaviordefined for geometries and box2d. However you can not feed it a geometry or box2d text represenation, since that willnot auto-cast.

This function supports 3d and will not drop the z-index.

This method supports Circular Strings and Curves

Examples

SELECT ST_YMax(’BOX3D(1 2 3, 4 5 6)’);st_ymax-------5

SELECT ST_YMax(ST_GeomFromText(’LINESTRING(1 3 4, 5 6 7)’));st_ymax-------6

SELECT ST_YMax(CAST(’BOX(-3 2, 3 4)’ As box2d));st_ymax-------4--Observe THIS DOES NOT WORK because it will try to autocast the string representation to a ←↩

BOX3DSELECT ST_YMax(’LINESTRING(1 3, 5 6)’);

--ERROR: BOX3D parser - doesnt start with BOX3D(

SELECT ST_YMax(ST_GeomFromEWKT(’CIRCULARSTRING(220268 150415 1,220227 150505 2,220227 ←↩150406 3)’));

st_ymax--------150506.126829327

See Also

ST_XMin, ST_XMax, ST_YMin, ST_ZMax, ST_ZMin

7.12.14 ST_YMin

Name

ST_YMin – Returns Y minima of a bounding box 2d or 3d or a geometry.

PostGIS 1.5.1 Manual268 / 315

Synopsis

float ST_YMin(box3d aGeomorBox2DorBox3D);

Description

Returns Y minima of a bounding box 2d or 3d or a geometry.

NoteAlthough this function is only defined for box3d, it will work for box2d and geometry because of the auto-casting behaviordefined for geometries and box2d. However you can not feed it a geometry or box2d text represenation, since that willnot auto-cast.

This function supports 3d and will not drop the z-index.

This method supports Circular Strings and Curves

Examples

SELECT ST_YMin(’BOX3D(1 2 3, 4 5 6)’);st_ymin-------2

SELECT ST_YMin(ST_GeomFromText(’LINESTRING(1 3 4, 5 6 7)’));st_ymin-------3

SELECT ST_YMin(CAST(’BOX(-3 2, 3 4)’ As box2d));st_ymin-------2--Observe THIS DOES NOT WORK because it will try to autocast the string representation to a ←↩

BOX3DSELECT ST_YMin(’LINESTRING(1 3, 5 6)’);

--ERROR: BOX3D parser - doesnt start with BOX3D(

SELECT ST_YMin(ST_GeomFromEWKT(’CIRCULARSTRING(220268 150415 1,220227 150505 2,220227 ←↩150406 3)’));

st_ymin--------150406

See Also

ST_GeomFromEWKT, ST_XMin, ST_XMax, ST_YMax, ST_ZMax, ST_ZMin

7.12.15 ST_ZMax

Name

ST_ZMax – Returns Z minima of a bounding box 2d or 3d or a geometry.