ArcMap

ST_Is3d

Definition

ST_Is3d takes an ST_Geometry as an input parameter and returns 1 (Oracle and SQLite) or t (PostgreSQL) if the given geometry has z-coordinates; otherwise, it returns 0 (Oracle and SQLite) or f (PostgreSQL).

Syntax

Oracle and PostgreSQL

sde.st_is3d (geometry1 sde.st_geometry)

SQLite

st_is3d (geometry1 geometryblob)

Return type

Boolean

Example

This example creates a table, is3d_test, and populates it with records.

Next, using ST_Is3d, check to see whether any of the records has a z-coordinate.

Oracle

CREATE TABLE is3d_test (
 id integer,
 geo sde.st_geometry
);

INSERT INTO IS3D_TEST VALUES (
 1902,
 sde.st_geometry ('polygon ((40 120, 90 120, 90 150, 40 150, 40 120))', 4326)
);

INSERT INTO IS3D_TEST VALUES (
 1903,
 sde.st_geometry ('multipoint m(10 10 5, 50 10 6, 10 30 8)' , 4326)
);

INSERT INTO IS3D_TEST VALUES (
 1904,
 sde.st_geometry ('linestring z(10 10 166, 20 10 168)', 4326)
);

INSERT INTO IS3D_TEST VALUES (
 1905,
 sde.st_geometry ('point zm(10 10 16 30)', 4326)
);

SELECT id, sde.st_is3d (geo) Is_3D
 FROM IS3D_TEST;

        ID      IS_3D

      1902          0
      1903          0
      1904          1
      1905          1

PostgreSQL

CREATE TABLE is3d_test (
 id integer,
 geo sde.st_geometry
);

INSERT INTO IS3D_TEST VALUES (
 1902,
 sde.st_geometry ('polygon ((40 120, 90 120, 90 150, 40 150, 40 120))', 4326)
);

INSERT INTO IS3D_TEST VALUES (
 1903,
 sde.st_geometry ('multipoint m(10 10 5, 50 10 6, 10 30 8)' , 4326)
);

INSERT INTO IS3D_TEST VALUES (
 1904,
 sde.st_geometry ('linestring z(10 10 166, 20 10 168)', 4326)
);

INSERT INTO IS3D_TEST VALUES (
 1905,
 sde.st_geometry ('point zm(10 10 16 30)', 4326)
);

SELECT id, sde.st_is3d (geo) 
 AS Is_3D
 FROM is3d_test;

        id      is_3d

      1902          f
      1903          f
      1904          t
      1905          t

SQLite

CREATE TABLE is3d_test (
 id integer
);

SELECT AddGeometryColumn (
 NULL,
 'is3d_test',
 'geo',
 4326,
 'geometryzm',
 'xyzm',
 'null'
);

INSERT INTO is3d_test VALUES (
 1902,
 st_geometry ('polygon ((40 120, 90 120, 90 150, 40 150, 40 120))', 4326)
);

INSERT INTO is3d_test VALUES (
 1903,
 st_geometry ('multipoint m(10 10 5, 50 10 6, 10 30 8)' , 4326)
);

INSERT INTO is3d_test VALUES (
 1904,
 st_geometry ('linestring z(10 10 166, 20 10 168)', 4326)
);

INSERT INTO is3d_test VALUES (
 1905,
 st_geometry ('point zm(10 10 16 30)', 4326)
);

SELECT id, st_is3d (geo)
 AS "Is_3D"
 FROM is3d_test;

      id      Is_3D

      1902          0
      1903          0
      1904          1
      1905          1

Related topics