[SEDONA-351] Support XYZM coordinate

common/src/main/java/org/apache/sedona/common/utils/GeomUtils.java

@@ -171,15 +171,14 @@ public static String getEWKT(Geometry geometry) {
         if (srid != 0) {
             sridString = "SRID=" + String.valueOf(srid) + ";";
         }
-
-        return sridString + new WKTWriter(GeomUtils.getDimension(geometry)).write(geometry);
+        return sridString + new WKTWriter(4).write(geometry);
     }
 
     public static String getWKT(Geometry geometry) {
         if (geometry == null) {
             return null;
         }
-        return new WKTWriter(GeomUtils.getDimension(geometry)).write(geometry);
+        return new WKTWriter(4).write(geometry);
     }
 
     public static byte[] getEWKB(Geometry geometry) {

common/src/test/java/org/apache/sedona/common/FunctionsTest.java

@@ -66,6 +66,82 @@ private Coordinate[] coordArray3d(double... coordValues) {
         return coords;
     }
 
+    @Test
+    public void asEWKT() throws Exception{
+        GeometryFactory geometryFactory = new GeometryFactory(new PrecisionModel(), 4236);
+        Geometry geometry = geometryFactory.createPoint(new Coordinate(1.0, 2.0));
+        String actualResult = Functions.asEWKT(geometry);
+        String expectedResult = "SRID=4236;POINT (1 2)";
+        Geometry acutal = Constructors.geomFromEWKT(expectedResult);
+        assertEquals(geometry, acutal);
+        assertEquals(expectedResult, actualResult);
+
+        geometry = geometryFactory.createPoint(new Coordinate(1.0, 2.0, 3.0));
+        actualResult = Functions.asEWKT(geometry);
+        expectedResult = "SRID=4236;POINT Z(1 2 3)";
+        acutal = Constructors.geomFromEWKT(expectedResult);
+        assertEquals(geometry, acutal);
+        assertEquals(expectedResult, actualResult);
+
+        geometry = geometryFactory.createPoint(new CoordinateXYM(1.0, 2.0, 3.0));
+        actualResult = Functions.asEWKT(geometry);
+        expectedResult = "SRID=4236;POINT M(1 2 3)";
+        acutal = Constructors.geomFromEWKT(expectedResult);
+        assertEquals(geometry, acutal);
+        assertEquals(expectedResult, actualResult);
+
+        geometry = geometryFactory.createPoint(new CoordinateXYZM(1.0, 2.0, 3.0, 4.0));
+        actualResult = Functions.asEWKT(geometry);
+        expectedResult = "SRID=4236;POINT ZM(1 2 3 4)";
+        acutal = Constructors.geomFromEWKT(expectedResult);
+        assertEquals(geometry, acutal);
+        assertEquals(expectedResult, actualResult);
+    }
+
+    @Test
+    public void asWKT() throws Exception {
+        Geometry geometry = GEOMETRY_FACTORY.createPoint(new Coordinate(1.0, 2.0));
+        String actualResult = Functions.asWKT(geometry);
+        String expectedResult = "POINT (1 2)";
+        Geometry acutal = Constructors.geomFromEWKT(expectedResult);
+        assertEquals(geometry, acutal);
+        assertEquals(expectedResult, actualResult);
+
+        geometry = GEOMETRY_FACTORY.createPoint(new Coordinate(1.0, 2.0, 3.0));
+        actualResult = Functions.asWKT(geometry);
+        expectedResult = "POINT Z(1 2 3)";
+        acutal = Constructors.geomFromEWKT(expectedResult);
+        assertEquals(geometry, acutal);
+        assertEquals(expectedResult, actualResult);
+
+        geometry = GEOMETRY_FACTORY.createPoint(new CoordinateXYM(1.0, 2.0, 3.0));
+        actualResult = Functions.asWKT(geometry);
+        expectedResult = "POINT M(1 2 3)";
+        acutal = Constructors.geomFromEWKT(expectedResult);
+        assertEquals(geometry, acutal);
+        assertEquals(expectedResult, actualResult);
+
+        geometry = GEOMETRY_FACTORY.createPoint(new CoordinateXYZM(1.0, 2.0, 3.0, 4.0));
+        actualResult = Functions.asWKT(geometry);
+        expectedResult = "POINT ZM(1 2 3 4)";
+        acutal = Constructors.geomFromEWKT(expectedResult);
+        assertEquals(geometry, acutal);
+        assertEquals(expectedResult, actualResult);
+    }
+
+    @Test
+    public void asWKB() throws Exception{
+        Geometry geometry = GEOMETRY_FACTORY.createPoint(new Coordinate(1.0, 2.0));
+        byte[] actualResult = Functions.asWKB(geometry);
+        Geometry expected = Constructors.geomFromWKB(actualResult);
+        assertEquals(expected, geometry);
+
+        geometry = GEOMETRY_FACTORY.createPoint(new Coordinate(1.0, 2.0, 3.0));
+        actualResult = Functions.asWKB(geometry);
+        expected = Constructors.geomFromWKB(actualResult);
+        assertEquals(expected, geometry);
+    }
+
     @Test
     public void splitLineStringByMultipoint() {
         LineString lineString = GEOMETRY_FACTORY.createLineString(coordArray(0.0, 0.0, 1.5, 1.5, 2.0, 2.0));

docs/api/flink/Function.md

@@ -269,6 +269,7 @@ Introduction: Return the Extended Well-Known Binary representation of a geometry
 EWKB is an extended version of WKB which includes the SRID of the geometry.
 The format originated in PostGIS but is supported by many GIS tools.
 If the geometry is lacking SRID a WKB format is produced.
+It will ignore the M coordinate if present.
 
 Format: `ST_AsEWKB (A:geometry)`
 
@@ -293,6 +294,7 @@ EWKT is an extended version of WKT which includes the SRID of the geometry.
 The format originated in PostGIS but is supported by many GIS tools.
 If the geometry is lacking SRID a WKT format is produced.
 [See ST_SetSRID](#ST_SetSRID)
+It will support M coodinate if present since v1.5.0.
 
 Format: `ST_AsEWKT (A:geometry)`
 
@@ -309,6 +311,30 @@ Output:
 SRID=4326;POLYGON ((0 0, 0 1, 1 1, 1 0, 0 0))
 ```
 
+Example:
+
+```sql
+SELECT ST_AsEWKT(ST_MakePointM(1.0, 1.0, 1.0))
+```
+
+Output:
+
+```
+POINT M(1 1 1)
+```
+
+Example:
+
+```sql
+SELECT ST_AsEWKT(ST_MakePoint(1.0, 1.0, 1.0, 1.0))
+```
+
+Output:
+
+```
+POINT ZM(1 1 1 1)
+```
+
 ## ST_AsGeoJSON
 
 Introduction: Return the [GeoJSON](https://geojson.org/) string representation of a geometry
@@ -379,7 +405,8 @@ Output:
 
 ## ST_AsText
 
-Introduction: Return the Well-Known Text string representation of a geometry
+Introduction: Return the Well-Known Text string representation of a geometry.
+It will support M coodinate if present since v1.5.0.
 
 Format: `ST_AsText (A:geometry)`
 
@@ -397,6 +424,30 @@ Output:
 POINT (1 1)
 ```
 
+Example:
+
+```sql
+SELECT ST_AsText(ST_MakePointM(1.0, 1.0, 1.0))
+```
+
+Output:
+
+```
+POINT M(1 1 1)
+```
+
+Example:
+
+```sql
+SELECT ST_AsText(ST_MakePoint(1.0, 1.0, 1.0, 1.0))
+```
+
+Output:
+
+```
+POINT ZM(1 1 1 1)
+```
+
 ## ST_Azimuth
 
 Introduction: Returns Azimuth for two given points in radians null otherwise.

docs/api/sql/Function.md

@@ -264,6 +264,7 @@ EWKB is an extended version of WKB which includes the SRID of the geometry.
 The format originated in PostGIS but is supported by many GIS tools.
 If the geometry is lacking SRID a WKB format is produced.
 [Se ST_SetSRID](#ST_SetSRID)
+It will ignore the M coordinate if present.
 
 Format: `ST_AsEWKB (A:geometry)`
 
@@ -288,6 +289,7 @@ EWKT is an extended version of WKT which includes the SRID of the geometry.
 The format originated in PostGIS but is supported by many GIS tools.
 If the geometry is lacking SRID a WKT format is produced.
 [See ST_SetSRID](#ST_SetSRID)
+It will support M coodinate if present since v1.5.0.
 
 Format: `ST_AsEWKT (A:geometry)`
 
@@ -305,6 +307,30 @@ Output:
 SRID=4326;POLYGON ((0 0, 0 1, 1 1, 1 0, 0 0))
 ```
 
+Example:
+
+```sql
+SELECT ST_AsEWKT(ST_MakePointM(1.0, 1.0, 1.0))
+```
+
+Output:
+
+```
+POINT M(1 1 1)
+```
+
+Example:
+
+```sql
+SELECT ST_AsEWKT(ST_MakePoint(1.0, 1.0, 1.0, 1.0))
+```
+
+Output:
+
+```
+POINT ZM(1 1 1 1)
+```
+
 ## ST_AsGeoJSON
 
 Introduction: Return the [GeoJSON](https://geojson.org/) string representation of a geometry
@@ -376,7 +402,8 @@ Output:
 
 ## ST_AsText
 
-Introduction: Return the Well-Known Text string representation of a geometry
+Introduction: Return the Well-Known Text string representation of a geometry.
+It will support M coodinate if present since v1.5.0.
 
 Format: `ST_AsText (A:geometry)`
 
@@ -394,6 +421,30 @@ Output:
 POINT (1 1)
 ```
 
+Example:
+
+```sql
+SELECT ST_AsText(ST_MakePointM(1.0, 1.0, 1.0))
+```
+
+Output:
+
+```
+POINT M(1 1 1)
+```
+
+Example:
+
+```sql
+SELECT ST_AsText(ST_MakePoint(1.0, 1.0, 1.0, 1.0))
+```
+
+Output:
+
+```
+POINT ZM(1 1 1 1)
+```
+
 ## ST_Azimuth
 
 Introduction: Returns Azimuth for two given points in radians null otherwise.

flink/src/main/java/org/apache/sedona/flink/expressions/Functions.java

@@ -455,7 +455,7 @@ public static class ST_AsText extends ScalarFunction {
         @DataTypeHint("String")
         public String eval(@DataTypeHint(value = "RAW", bridgedTo = org.locationtech.jts.geom.Geometry.class) Object o) {
             Geometry geom = (Geometry) o;
-            return org.apache.sedona.common.Functions.asEWKT(geom);
+            return org.apache.sedona.common.Functions.asWKT(geom);
         }
     }