ArcMap

ST_MaxM

Definition

ST_MaxM takes a geometry as an input parameter and returns its maximum m-coordinate.

Syntax

Oracle and PostgreSQL

sde.st_maxm (geometry1 sde.st_geometry)

SQLite

st_maxm (geometry1 geometryblob)

Return type

Oracle and PostgreSQL

Number

If no m values are present, NULL is returned.

SQLite

Double precision

If no m values are present, NULL is returned.

Example

The table, maxm_test, is created and two polygons inserted to it. Then, ST_MaxM is run to determine the maximum m-value in each polygon.

Oracle

CREATE TABLE maxm_test (
 id integer,
 geometry sde.st_geometry
);

INSERT INTO MAXM_TEST VALUES (
 1901,
 sde.st_polygon ('polygon zm((110 120 20 3, 110 140 22 3, 120 130 26 4, 110 120 20 3))', 4326)
);

INSERT INTO MAXM_TEST VALUES (
 1902,
 sde.st_polygon ('polygon zm((0 0 40 7, 0 4 35 9, 5 4 32 12, 5 0 31 5, 0 0 40 7))', 4326)
);

SELECT id, sde.st_maxm (geometry) Max_M
 FROM MAXM_TEST;

        ID             MAX_M

      1901                 4
      1902                12

PostgreSQL

CREATE TABLE maxm_test (
 id integer,
 geometry sde.st_geometry
);

INSERT INTO maxm_test VALUES (
 1901,
 sde.st_polygon ('polygon zm((110 120 20 3, 110 140 22 3, 120 130 26 4, 110 120 20 3))', 4326)
);

INSERT INTO maxm_test VALUES (
 1902,
 sde.st_polygon ('polygon zm((0 0 40 7, 0 4 35 9, 5 4 32 12, 5 0 31 5, 0 0 40 7))', 4326)
);

SELECT id, sde.st_maxm (geometry) 
 AS Max_M
 FROM maxm_test;

        id             max_m

      1901                 4
      1902                12

SQLite

CREATE TABLE maxm_test (
 id integer
);

SELECT AddGeometryColumn (
 NULL,
 'maxm_test',
 'geometry',
 4326,
 'polygonzm',
 'xyzm',
 'null'
);

INSERT INTO maxm_test VALUES (
 1901,
 st_polygon ('polygon zm((110 120 20 3, 110 140 22 3, 120 130 26 4, 110 120 20 3))', 4326)
);

INSERT INTO maxm_test VALUES (
 1902,
 st_polygon ('polygon zm((0 0 40 7, 0 4 35 9, 5 4 32 12, 5 0 31 5, 0 0 40 7))', 4326)
);

SELECT id, st_maxm (geometry) 
 AS "Max M"
 FROM maxm_test;

id             Max M

1901           4.0
1902           12.0

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