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[FEATURE][processing] K Means clustering algorithm
Adds a native k-means clustering algorithm. Based on a port of PostGIS' ST_ClusterKMeans function, this new algorithm adds a new cluster ID field to a set of input features identify the feature's cluster based on the k-means clustering approach. If non-point geometries are used as input, the clustering is based off the centroid of the input geometries.
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- BIN python/plugins/processing/tests/testdata/custom/circular_strings.gpkg
- +55 −0 python/plugins/processing/tests/testdata/expected/kmeans_lines.gml
- +30 −0 python/plugins/processing/tests/testdata/expected/kmeans_lines.xsd
- +86 −0 python/plugins/processing/tests/testdata/expected/kmeans_points_3.gml
- +44 −0 python/plugins/processing/tests/testdata/expected/kmeans_points_3.xsd
- +86 −0 python/plugins/processing/tests/testdata/expected/kmeans_points_5.gml
- +44 −0 python/plugins/processing/tests/testdata/expected/kmeans_points_5.xsd
- +67 −0 python/plugins/processing/tests/testdata/expected/kmeans_polys.gml
- +50 −0 python/plugins/processing/tests/testdata/expected/kmeans_polys.xsd
- +52 −0 python/plugins/processing/tests/testdata/qgis_algorithm_tests.yaml
- +2 −1 src/analysis/CMakeLists.txt
- +371 −0 src/analysis/processing/qgsalgorithmkmeansclustering.cpp
- +77 −0 src/analysis/processing/qgsalgorithmkmeansclustering.h
- +2 −0 src/analysis/processing/qgsnativealgorithms.cpp
- +6 −0 src/core/geometry/qgsgeometry.cpp
- +60 −0 tests/src/analysis/testqgsprocessingalgs.cpp
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| @@ -0,0 +1,55 @@ | ||
| <?xml version="1.0" encoding="utf-8" ?> | ||
| <ogr:FeatureCollection | ||
| xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" | ||
| xsi:schemaLocation="http://ogr.maptools.org/ kmeans_lines.xsd" | ||
| xmlns:ogr="http://ogr.maptools.org/" | ||
| xmlns:gml="http://www.opengis.net/gml"> | ||
| <gml:boundedBy> | ||
| <gml:Box> | ||
| <gml:coord><gml:X>-1</gml:X><gml:Y>-3</gml:Y></gml:coord> | ||
| <gml:coord><gml:X>11</gml:X><gml:Y>5</gml:Y></gml:coord> | ||
| </gml:Box> | ||
| </gml:boundedBy> | ||
|
|
||
| <gml:featureMember> | ||
| <ogr:kmeans_lines fid="lines.0"> | ||
| <ogr:geometryProperty><gml:LineString srsName="EPSG:4326"><gml:coordinates>6,2 9,2 9,3 11,5</gml:coordinates></gml:LineString></ogr:geometryProperty> | ||
| <ogr:CLUSTER_ID>1</ogr:CLUSTER_ID> | ||
| </ogr:kmeans_lines> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_lines fid="lines.1"> | ||
| <ogr:geometryProperty><gml:LineString srsName="EPSG:4326"><gml:coordinates>-1,-1 1,-1</gml:coordinates></gml:LineString></ogr:geometryProperty> | ||
| <ogr:CLUSTER_ID>0</ogr:CLUSTER_ID> | ||
| </ogr:kmeans_lines> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_lines fid="lines.2"> | ||
| <ogr:geometryProperty><gml:LineString srsName="EPSG:4326"><gml:coordinates>2,0 2,2 3,2 3,3</gml:coordinates></gml:LineString></ogr:geometryProperty> | ||
| <ogr:CLUSTER_ID>0</ogr:CLUSTER_ID> | ||
| </ogr:kmeans_lines> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_lines fid="lines.3"> | ||
| <ogr:geometryProperty><gml:LineString srsName="EPSG:4326"><gml:coordinates>3,1 5,1</gml:coordinates></gml:LineString></ogr:geometryProperty> | ||
| <ogr:CLUSTER_ID>0</ogr:CLUSTER_ID> | ||
| </ogr:kmeans_lines> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_lines fid="lines.4"> | ||
| <ogr:geometryProperty><gml:LineString srsName="EPSG:4326"><gml:coordinates>7,-3 10,-3</gml:coordinates></gml:LineString></ogr:geometryProperty> | ||
| <ogr:CLUSTER_ID>1</ogr:CLUSTER_ID> | ||
| </ogr:kmeans_lines> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_lines fid="lines.5"> | ||
| <ogr:geometryProperty><gml:LineString srsName="EPSG:4326"><gml:coordinates>6,-3 10,1</gml:coordinates></gml:LineString></ogr:geometryProperty> | ||
| <ogr:CLUSTER_ID>1</ogr:CLUSTER_ID> | ||
| </ogr:kmeans_lines> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_lines fid="lines.6"> | ||
| <ogr:CLUSTER_ID xsi:nil="true"/> | ||
| </ogr:kmeans_lines> | ||
| </gml:featureMember> | ||
| </ogr:FeatureCollection> |
| @@ -0,0 +1,30 @@ | ||
| <?xml version="1.0" encoding="UTF-8"?> | ||
| <xs:schema targetNamespace="http://ogr.maptools.org/" xmlns:ogr="http://ogr.maptools.org/" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:gml="http://www.opengis.net/gml" elementFormDefault="qualified" version="1.0"> | ||
| <xs:import namespace="http://www.opengis.net/gml" schemaLocation="http://schemas.opengis.net/gml/2.1.2/feature.xsd"/> | ||
| <xs:element name="FeatureCollection" type="ogr:FeatureCollectionType" substitutionGroup="gml:_FeatureCollection"/> | ||
| <xs:complexType name="FeatureCollectionType"> | ||
| <xs:complexContent> | ||
| <xs:extension base="gml:AbstractFeatureCollectionType"> | ||
| <xs:attribute name="lockId" type="xs:string" use="optional"/> | ||
| <xs:attribute name="scope" type="xs:string" use="optional"/> | ||
| </xs:extension> | ||
| </xs:complexContent> | ||
| </xs:complexType> | ||
| <xs:element name="kmeans_lines" type="ogr:kmeans_lines_Type" substitutionGroup="gml:_Feature"/> | ||
| <xs:complexType name="kmeans_lines_Type"> | ||
| <xs:complexContent> | ||
| <xs:extension base="gml:AbstractFeatureType"> | ||
| <xs:sequence> | ||
| <xs:element name="geometryProperty" type="gml:LineStringPropertyType" nillable="true" minOccurs="0" maxOccurs="1"/> | ||
| <xs:element name="CLUSTER_ID" nillable="true" minOccurs="0" maxOccurs="1"> | ||
| <xs:simpleType> | ||
| <xs:restriction base="xs:integer"> | ||
| <xs:totalDigits value="10"/> | ||
| </xs:restriction> | ||
| </xs:simpleType> | ||
| </xs:element> | ||
| </xs:sequence> | ||
| </xs:extension> | ||
| </xs:complexContent> | ||
| </xs:complexType> | ||
| </xs:schema> |
| @@ -0,0 +1,86 @@ | ||
| <?xml version="1.0" encoding="utf-8" ?> | ||
| <ogr:FeatureCollection | ||
| xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" | ||
| xsi:schemaLocation="http://ogr.maptools.org/ kmeans_points_3.xsd" | ||
| xmlns:ogr="http://ogr.maptools.org/" | ||
| xmlns:gml="http://www.opengis.net/gml"> | ||
| <gml:boundedBy> | ||
| <gml:Box> | ||
| <gml:coord><gml:X>0</gml:X><gml:Y>-5</gml:Y></gml:coord> | ||
| <gml:coord><gml:X>8</gml:X><gml:Y>3</gml:Y></gml:coord> | ||
| </gml:Box> | ||
| </gml:boundedBy> | ||
|
|
||
| <gml:featureMember> | ||
| <ogr:kmeans_points_3 fid="points.0"> | ||
| <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>1,1</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
| <ogr:id>1</ogr:id> | ||
| <ogr:id2>2</ogr:id2> | ||
| <ogr:CLUSTER_ID>2</ogr:CLUSTER_ID> | ||
| </ogr:kmeans_points_3> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_points_3 fid="points.1"> | ||
| <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>3,3</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
| <ogr:id>2</ogr:id> | ||
| <ogr:id2>1</ogr:id2> | ||
| <ogr:CLUSTER_ID>2</ogr:CLUSTER_ID> | ||
| </ogr:kmeans_points_3> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_points_3 fid="points.2"> | ||
| <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>2,2</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
| <ogr:id>3</ogr:id> | ||
| <ogr:id2>0</ogr:id2> | ||
| <ogr:CLUSTER_ID>2</ogr:CLUSTER_ID> | ||
| </ogr:kmeans_points_3> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_points_3 fid="points.3"> | ||
| <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>5,2</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
| <ogr:id>4</ogr:id> | ||
| <ogr:id2>2</ogr:id2> | ||
| <ogr:CLUSTER_ID>2</ogr:CLUSTER_ID> | ||
| </ogr:kmeans_points_3> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_points_3 fid="points.4"> | ||
| <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>4,1</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
| <ogr:id>5</ogr:id> | ||
| <ogr:id2>1</ogr:id2> | ||
| <ogr:CLUSTER_ID>2</ogr:CLUSTER_ID> | ||
| </ogr:kmeans_points_3> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_points_3 fid="points.5"> | ||
| <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>0,-5</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
| <ogr:id>6</ogr:id> | ||
| <ogr:id2>0</ogr:id2> | ||
| <ogr:CLUSTER_ID>1</ogr:CLUSTER_ID> | ||
| </ogr:kmeans_points_3> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_points_3 fid="points.6"> | ||
| <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>8,-1</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
| <ogr:id>7</ogr:id> | ||
| <ogr:id2>0</ogr:id2> | ||
| <ogr:CLUSTER_ID>0</ogr:CLUSTER_ID> | ||
| </ogr:kmeans_points_3> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_points_3 fid="points.7"> | ||
| <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>7,-1</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
| <ogr:id>8</ogr:id> | ||
| <ogr:id2>0</ogr:id2> | ||
| <ogr:CLUSTER_ID>0</ogr:CLUSTER_ID> | ||
| </ogr:kmeans_points_3> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_points_3 fid="points.8"> | ||
| <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>0,-1</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
| <ogr:id>9</ogr:id> | ||
| <ogr:id2>0</ogr:id2> | ||
| <ogr:CLUSTER_ID>2</ogr:CLUSTER_ID> | ||
| </ogr:kmeans_points_3> | ||
| </gml:featureMember> | ||
| </ogr:FeatureCollection> |
| @@ -0,0 +1,44 @@ | ||
| <?xml version="1.0" encoding="UTF-8"?> | ||
| <xs:schema targetNamespace="http://ogr.maptools.org/" xmlns:ogr="http://ogr.maptools.org/" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:gml="http://www.opengis.net/gml" elementFormDefault="qualified" version="1.0"> | ||
| <xs:import namespace="http://www.opengis.net/gml" schemaLocation="http://schemas.opengis.net/gml/2.1.2/feature.xsd"/> | ||
| <xs:element name="FeatureCollection" type="ogr:FeatureCollectionType" substitutionGroup="gml:_FeatureCollection"/> | ||
| <xs:complexType name="FeatureCollectionType"> | ||
| <xs:complexContent> | ||
| <xs:extension base="gml:AbstractFeatureCollectionType"> | ||
| <xs:attribute name="lockId" type="xs:string" use="optional"/> | ||
| <xs:attribute name="scope" type="xs:string" use="optional"/> | ||
| </xs:extension> | ||
| </xs:complexContent> | ||
| </xs:complexType> | ||
| <xs:element name="kmeans_points_3" type="ogr:kmeans_points_3_Type" substitutionGroup="gml:_Feature"/> | ||
| <xs:complexType name="kmeans_points_3_Type"> | ||
| <xs:complexContent> | ||
| <xs:extension base="gml:AbstractFeatureType"> | ||
| <xs:sequence> | ||
| <xs:element name="geometryProperty" type="gml:PointPropertyType" nillable="true" minOccurs="0" maxOccurs="1"/> | ||
| <xs:element name="id" nillable="true" minOccurs="0" maxOccurs="1"> | ||
| <xs:simpleType> | ||
| <xs:restriction base="xs:integer"> | ||
| <xs:totalDigits value="10"/> | ||
| </xs:restriction> | ||
| </xs:simpleType> | ||
| </xs:element> | ||
| <xs:element name="id2" nillable="true" minOccurs="0" maxOccurs="1"> | ||
| <xs:simpleType> | ||
| <xs:restriction base="xs:integer"> | ||
| <xs:totalDigits value="10"/> | ||
| </xs:restriction> | ||
| </xs:simpleType> | ||
| </xs:element> | ||
| <xs:element name="CLUSTER_ID" nillable="true" minOccurs="0" maxOccurs="1"> | ||
| <xs:simpleType> | ||
| <xs:restriction base="xs:integer"> | ||
| <xs:totalDigits value="10"/> | ||
| </xs:restriction> | ||
| </xs:simpleType> | ||
| </xs:element> | ||
| </xs:sequence> | ||
| </xs:extension> | ||
| </xs:complexContent> | ||
| </xs:complexType> | ||
| </xs:schema> |
| @@ -0,0 +1,86 @@ | ||
| <?xml version="1.0" encoding="utf-8" ?> | ||
| <ogr:FeatureCollection | ||
| xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" | ||
| xsi:schemaLocation="http://ogr.maptools.org/ kmeans_points_5.xsd" | ||
| xmlns:ogr="http://ogr.maptools.org/" | ||
| xmlns:gml="http://www.opengis.net/gml"> | ||
| <gml:boundedBy> | ||
| <gml:Box> | ||
| <gml:coord><gml:X>0</gml:X><gml:Y>-5</gml:Y></gml:coord> | ||
| <gml:coord><gml:X>8</gml:X><gml:Y>3</gml:Y></gml:coord> | ||
| </gml:Box> | ||
| </gml:boundedBy> | ||
|
|
||
| <gml:featureMember> | ||
| <ogr:kmeans_points_5 fid="points.0"> | ||
| <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>1,1</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
| <ogr:id>1</ogr:id> | ||
| <ogr:id2>2</ogr:id2> | ||
| <ogr:CLUSTER_ID5>2</ogr:CLUSTER_ID5> | ||
| </ogr:kmeans_points_5> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_points_5 fid="points.1"> | ||
| <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>3,3</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
| <ogr:id>2</ogr:id> | ||
| <ogr:id2>1</ogr:id2> | ||
| <ogr:CLUSTER_ID5>2</ogr:CLUSTER_ID5> | ||
| </ogr:kmeans_points_5> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_points_5 fid="points.2"> | ||
| <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>2,2</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
| <ogr:id>3</ogr:id> | ||
| <ogr:id2>0</ogr:id2> | ||
| <ogr:CLUSTER_ID5>2</ogr:CLUSTER_ID5> | ||
| </ogr:kmeans_points_5> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_points_5 fid="points.3"> | ||
| <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>5,2</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
| <ogr:id>4</ogr:id> | ||
| <ogr:id2>2</ogr:id2> | ||
| <ogr:CLUSTER_ID5>4</ogr:CLUSTER_ID5> | ||
| </ogr:kmeans_points_5> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_points_5 fid="points.4"> | ||
| <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>4,1</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
| <ogr:id>5</ogr:id> | ||
| <ogr:id2>1</ogr:id2> | ||
| <ogr:CLUSTER_ID5>4</ogr:CLUSTER_ID5> | ||
| </ogr:kmeans_points_5> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_points_5 fid="points.5"> | ||
| <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>0,-5</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
| <ogr:id>6</ogr:id> | ||
| <ogr:id2>0</ogr:id2> | ||
| <ogr:CLUSTER_ID5>1</ogr:CLUSTER_ID5> | ||
| </ogr:kmeans_points_5> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_points_5 fid="points.6"> | ||
| <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>8,-1</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
| <ogr:id>7</ogr:id> | ||
| <ogr:id2>0</ogr:id2> | ||
| <ogr:CLUSTER_ID5>0</ogr:CLUSTER_ID5> | ||
| </ogr:kmeans_points_5> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_points_5 fid="points.7"> | ||
| <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>7,-1</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
| <ogr:id>8</ogr:id> | ||
| <ogr:id2>0</ogr:id2> | ||
| <ogr:CLUSTER_ID5>0</ogr:CLUSTER_ID5> | ||
| </ogr:kmeans_points_5> | ||
| </gml:featureMember> | ||
| <gml:featureMember> | ||
| <ogr:kmeans_points_5 fid="points.8"> | ||
| <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>0,-1</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
| <ogr:id>9</ogr:id> | ||
| <ogr:id2>0</ogr:id2> | ||
| <ogr:CLUSTER_ID5>3</ogr:CLUSTER_ID5> | ||
| </ogr:kmeans_points_5> | ||
| </gml:featureMember> | ||
| </ogr:FeatureCollection> |
| @@ -0,0 +1,44 @@ | ||
| <?xml version="1.0" encoding="UTF-8"?> | ||
| <xs:schema targetNamespace="http://ogr.maptools.org/" xmlns:ogr="http://ogr.maptools.org/" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:gml="http://www.opengis.net/gml" elementFormDefault="qualified" version="1.0"> | ||
| <xs:import namespace="http://www.opengis.net/gml" schemaLocation="http://schemas.opengis.net/gml/2.1.2/feature.xsd"/> | ||
| <xs:element name="FeatureCollection" type="ogr:FeatureCollectionType" substitutionGroup="gml:_FeatureCollection"/> | ||
| <xs:complexType name="FeatureCollectionType"> | ||
| <xs:complexContent> | ||
| <xs:extension base="gml:AbstractFeatureCollectionType"> | ||
| <xs:attribute name="lockId" type="xs:string" use="optional"/> | ||
| <xs:attribute name="scope" type="xs:string" use="optional"/> | ||
| </xs:extension> | ||
| </xs:complexContent> | ||
| </xs:complexType> | ||
| <xs:element name="kmeans_points_5" type="ogr:kmeans_points_5_Type" substitutionGroup="gml:_Feature"/> | ||
| <xs:complexType name="kmeans_points_5_Type"> | ||
| <xs:complexContent> | ||
| <xs:extension base="gml:AbstractFeatureType"> | ||
| <xs:sequence> | ||
| <xs:element name="geometryProperty" type="gml:PointPropertyType" nillable="true" minOccurs="0" maxOccurs="1"/> | ||
| <xs:element name="id" nillable="true" minOccurs="0" maxOccurs="1"> | ||
| <xs:simpleType> | ||
| <xs:restriction base="xs:integer"> | ||
| <xs:totalDigits value="10"/> | ||
| </xs:restriction> | ||
| </xs:simpleType> | ||
| </xs:element> | ||
| <xs:element name="id2" nillable="true" minOccurs="0" maxOccurs="1"> | ||
| <xs:simpleType> | ||
| <xs:restriction base="xs:integer"> | ||
| <xs:totalDigits value="10"/> | ||
| </xs:restriction> | ||
| </xs:simpleType> | ||
| </xs:element> | ||
| <xs:element name="CLUSTER_ID5" nillable="true" minOccurs="0" maxOccurs="1"> | ||
| <xs:simpleType> | ||
| <xs:restriction base="xs:integer"> | ||
| <xs:totalDigits value="10"/> | ||
| </xs:restriction> | ||
| </xs:simpleType> | ||
| </xs:element> | ||
| </xs:sequence> | ||
| </xs:extension> | ||
| </xs:complexContent> | ||
| </xs:complexType> | ||
| </xs:schema> |
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