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[FEATURE][processing] Interpolate point on line algorithm
This algorithm creates a point geometry interpolated at a set distance along line (or polygon boundary) geometries.
This commit is contained in:
Nyall Dawson
parent
7ef5631d6b
commit
8365335fd3
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48
python/plugins/processing/tests/testdata/expected/interpolate_point_lines.gml
vendored
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48
python/plugins/processing/tests/testdata/expected/interpolate_point_lines.gml
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@ -0,0 +1,48 @@
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<?xml version="1.0" encoding="utf-8" ?>
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<ogr:FeatureCollection
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://ogr.maptools.org/ interpolate_point_lines.xsd"
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xmlns:ogr="http://ogr.maptools.org/"
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xmlns:gml="http://www.opengis.net/gml">
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<gml:boundedBy>
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<gml:Box>
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<gml:coord><gml:X>0</gml:X><gml:Y>-3</gml:Y></gml:coord>
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<gml:coord><gml:X>8</gml:X><gml:Y>2</gml:Y></gml:coord>
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</gml:Box>
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</gml:boundedBy>
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<gml:featureMember>
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<ogr:interpolate_point_lines fid="lines.0">
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<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>7,2</gml:coordinates></gml:Point></ogr:geometryProperty>
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</ogr:interpolate_point_lines>
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</gml:featureMember>
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<gml:featureMember>
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<ogr:interpolate_point_lines fid="lines.1">
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<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>0,-1</gml:coordinates></gml:Point></ogr:geometryProperty>
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</ogr:interpolate_point_lines>
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</gml:featureMember>
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<gml:featureMember>
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<ogr:interpolate_point_lines fid="lines.2">
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<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>2,1</gml:coordinates></gml:Point></ogr:geometryProperty>
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</ogr:interpolate_point_lines>
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</gml:featureMember>
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<gml:featureMember>
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<ogr:interpolate_point_lines fid="lines.3">
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<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>4,1</gml:coordinates></gml:Point></ogr:geometryProperty>
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</ogr:interpolate_point_lines>
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</gml:featureMember>
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<gml:featureMember>
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<ogr:interpolate_point_lines fid="lines.4">
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<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>8,-3</gml:coordinates></gml:Point></ogr:geometryProperty>
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</ogr:interpolate_point_lines>
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</gml:featureMember>
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<gml:featureMember>
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<ogr:interpolate_point_lines fid="lines.5">
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<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>6.70710678118655,-2.29289321881345</gml:coordinates></gml:Point></ogr:geometryProperty>
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</ogr:interpolate_point_lines>
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</gml:featureMember>
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<gml:featureMember>
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<ogr:interpolate_point_lines fid="lines.6">
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</ogr:interpolate_point_lines>
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</gml:featureMember>
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</ogr:FeatureCollection>
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23
python/plugins/processing/tests/testdata/expected/interpolate_point_lines.xsd
vendored
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23
python/plugins/processing/tests/testdata/expected/interpolate_point_lines.xsd
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@ -0,0 +1,23 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<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">
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<xs:import namespace="http://www.opengis.net/gml" schemaLocation="http://schemas.opengis.net/gml/2.1.2/feature.xsd"/>
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<xs:element name="FeatureCollection" type="ogr:FeatureCollectionType" substitutionGroup="gml:_FeatureCollection"/>
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<xs:complexType name="FeatureCollectionType">
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<xs:complexContent>
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<xs:extension base="gml:AbstractFeatureCollectionType">
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<xs:attribute name="lockId" type="xs:string" use="optional"/>
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<xs:attribute name="scope" type="xs:string" use="optional"/>
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</xs:extension>
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</xs:complexContent>
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</xs:complexType>
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<xs:element name="interpolate_point_lines" type="ogr:interpolate_point_lines_Type" substitutionGroup="gml:_Feature"/>
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<xs:complexType name="interpolate_point_lines_Type">
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<xs:complexContent>
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<xs:extension base="gml:AbstractFeatureType">
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<xs:sequence>
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<xs:element name="geometryProperty" type="gml:PointPropertyType" nillable="true" minOccurs="0" maxOccurs="1"/>
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</xs:sequence>
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</xs:extension>
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</xs:complexContent>
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</xs:complexType>
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</xs:schema>
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61
python/plugins/processing/tests/testdata/expected/interpolate_point_polys.gml
vendored
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61
python/plugins/processing/tests/testdata/expected/interpolate_point_polys.gml
vendored
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@ -0,0 +1,61 @@
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<?xml version="1.0" encoding="utf-8" ?>
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<ogr:FeatureCollection
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://ogr.maptools.org/ interpolate_point_polys.xsd"
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xmlns:ogr="http://ogr.maptools.org/"
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xmlns:gml="http://www.opengis.net/gml">
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<gml:boundedBy>
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<gml:Box>
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<gml:coord><gml:X>-1</gml:X><gml:Y>1</gml:Y></gml:coord>
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<gml:coord><gml:X>8</gml:X><gml:Y>6</gml:Y></gml:coord>
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</gml:Box>
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</gml:boundedBy>
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<gml:featureMember>
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<ogr:interpolate_point_polys fid="polys.0">
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<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>-1,1</gml:coordinates></gml:Point></ogr:geometryProperty>
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<ogr:name>aaaaa</ogr:name>
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<ogr:intval>33</ogr:intval>
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<ogr:floatval>44.123456</ogr:floatval>
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</ogr:interpolate_point_polys>
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</gml:featureMember>
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<gml:featureMember>
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<ogr:interpolate_point_polys fid="polys.1">
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<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>5.41421356237309,4.0</gml:coordinates></gml:Point></ogr:geometryProperty>
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<ogr:name>Aaaaa</ogr:name>
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<ogr:intval>-33</ogr:intval>
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<ogr:floatval>0</ogr:floatval>
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</ogr:interpolate_point_polys>
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</gml:featureMember>
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<gml:featureMember>
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<ogr:interpolate_point_polys fid="polys.2">
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<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>3,6</gml:coordinates></gml:Point></ogr:geometryProperty>
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<ogr:name>bbaaa</ogr:name>
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<ogr:intval xsi:nil="true"/>
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<ogr:floatval>0.123</ogr:floatval>
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</ogr:interpolate_point_polys>
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</gml:featureMember>
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<gml:featureMember>
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<ogr:interpolate_point_polys fid="polys.3">
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<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>8,1</gml:coordinates></gml:Point></ogr:geometryProperty>
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<ogr:name>ASDF</ogr:name>
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<ogr:intval>0</ogr:intval>
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<ogr:floatval xsi:nil="true"/>
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</ogr:interpolate_point_polys>
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</gml:featureMember>
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<gml:featureMember>
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<ogr:interpolate_point_polys fid="polys.4">
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<ogr:name xsi:nil="true"/>
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<ogr:intval>120</ogr:intval>
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<ogr:floatval>-100291.43213</ogr:floatval>
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</ogr:interpolate_point_polys>
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</gml:featureMember>
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<gml:featureMember>
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<ogr:interpolate_point_polys fid="polys.5">
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<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>4.89736659610103,1.36754446796632</gml:coordinates></gml:Point></ogr:geometryProperty>
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<ogr:name>elim</ogr:name>
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<ogr:intval>2</ogr:intval>
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<ogr:floatval>3.33</ogr:floatval>
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</ogr:interpolate_point_polys>
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</gml:featureMember>
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</ogr:FeatureCollection>
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43
python/plugins/processing/tests/testdata/expected/interpolate_point_polys.xsd
vendored
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43
python/plugins/processing/tests/testdata/expected/interpolate_point_polys.xsd
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@ -0,0 +1,43 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<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">
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<xs:import namespace="http://www.opengis.net/gml" schemaLocation="http://schemas.opengis.net/gml/2.1.2/feature.xsd"/>
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<xs:element name="FeatureCollection" type="ogr:FeatureCollectionType" substitutionGroup="gml:_FeatureCollection"/>
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<xs:complexType name="FeatureCollectionType">
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<xs:complexContent>
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<xs:extension base="gml:AbstractFeatureCollectionType">
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<xs:attribute name="lockId" type="xs:string" use="optional"/>
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<xs:attribute name="scope" type="xs:string" use="optional"/>
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</xs:extension>
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</xs:complexContent>
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</xs:complexType>
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<xs:element name="interpolate_point_polys" type="ogr:interpolate_point_polys_Type" substitutionGroup="gml:_Feature"/>
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<xs:complexType name="interpolate_point_polys_Type">
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<xs:complexContent>
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<xs:extension base="gml:AbstractFeatureType">
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<xs:sequence>
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<xs:element name="geometryProperty" type="gml:PointPropertyType" nillable="true" minOccurs="0" maxOccurs="1"/>
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<xs:element name="name" nillable="true" minOccurs="0" maxOccurs="1">
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<xs:simpleType>
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<xs:restriction base="xs:string">
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<xs:maxLength value="5"/>
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</xs:restriction>
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</xs:simpleType>
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</xs:element>
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<xs:element name="intval" nillable="true" minOccurs="0" maxOccurs="1">
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<xs:simpleType>
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<xs:restriction base="xs:integer">
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<xs:totalDigits value="10"/>
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</xs:restriction>
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</xs:simpleType>
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</xs:element>
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<xs:element name="floatval" nillable="true" minOccurs="0" maxOccurs="1">
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<xs:simpleType>
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<xs:restriction base="xs:decimal">
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</xs:restriction>
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</xs:simpleType>
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</xs:element>
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</xs:sequence>
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</xs:extension>
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</xs:complexContent>
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</xs:complexType>
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</xs:schema>
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@ -3606,6 +3606,9 @@ tests:
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OUTPUT:
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name: expected/airportsvoronoidiagram.gml
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type: vector
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compare:
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geometry:
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precision: 2
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- algorithm: native:explodelines
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name: Explode lines
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@ -6056,5 +6059,29 @@ tests:
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name: expected/line_substring.gml
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type: vector
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- algorithm: native:interpolatepoint
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name: Interpolate points (line)
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params:
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DISTANCE: 1.0
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INPUT:
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name: lines.gml
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type: vector
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results:
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OUTPUT:
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name: expected/interpolate_point_lines.gml
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type: vector
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- algorithm: native:interpolatepoint
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name: Interpolate points (polygons)
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params:
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DISTANCE: 2.0
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INPUT:
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name: polys.gml
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type: vector
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results:
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OUTPUT:
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name: expected/interpolate_point_polys.gml
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type: vector
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# See ../README.md for a description of the file format
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@ -47,6 +47,7 @@ SET(QGIS_ANALYSIS_SRCS
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processing/qgsalgorithmfiltervertices.cpp
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processing/qgsalgorithmfixgeometries.cpp
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processing/qgsalgorithmimportphotos.cpp
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processing/qgsalgorithminterpolatepoint.cpp
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processing/qgsalgorithmintersection.cpp
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processing/qgsalgorithmjoinbyattribute.cpp
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processing/qgsalgorithmjoinwithlines.cpp
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127
src/analysis/processing/qgsalgorithminterpolatepoint.cpp
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127
src/analysis/processing/qgsalgorithminterpolatepoint.cpp
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/***************************************************************************
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qgsalgorithminterpolatepoint.cpp
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---------------------
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begin : August 2018
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copyright : (C) 2018 by Nyall Dawson
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email : nyall dot dawson at gmail dot com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include "qgsalgorithminterpolatepoint.h"
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#include "qgsgeometrycollection.h"
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#include "qgscurve.h"
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///@cond PRIVATE
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QString QgsInterpolatePointAlgorithm::name() const
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{
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return QStringLiteral( "interpolatepoint" );
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}
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QString QgsInterpolatePointAlgorithm::displayName() const
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{
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return QObject::tr( "Interpolate point on line" );
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}
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QStringList QgsInterpolatePointAlgorithm::tags() const
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{
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return QObject::tr( "linestring,reference,referencing,distance,interpolate" ).split( ',' );
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}
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QString QgsInterpolatePointAlgorithm::group() const
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{
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return QObject::tr( "Vector geometry" );
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}
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QString QgsInterpolatePointAlgorithm::groupId() const
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{
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return QStringLiteral( "vectorgeometry" );
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}
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QString QgsInterpolatePointAlgorithm::outputName() const
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{
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return QObject::tr( "Interpolated points" );
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}
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QString QgsInterpolatePointAlgorithm::shortHelpString() const
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{
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return QObject::tr( "This algorithm creates a point geometry interpolated at a set distance along line geometries." );
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}
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QString QgsInterpolatePointAlgorithm::shortDescription() const
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{
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return QObject::tr( "Interpolates a point along lines at a set distance." );
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}
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QList<int> QgsInterpolatePointAlgorithm::inputLayerTypes() const
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{
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return QList<int>() << QgsProcessing::TypeVectorLine << QgsProcessing::TypeVectorPolygon;
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}
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QgsProcessing::SourceType QgsInterpolatePointAlgorithm::outputLayerType() const
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{
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return QgsProcessing::TypeVectorPoint;
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}
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QgsWkbTypes::Type QgsInterpolatePointAlgorithm::outputWkbType( QgsWkbTypes::Type ) const
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{
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return QgsWkbTypes::Point;
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}
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QgsInterpolatePointAlgorithm *QgsInterpolatePointAlgorithm::createInstance() const
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{
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return new QgsInterpolatePointAlgorithm();
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}
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void QgsInterpolatePointAlgorithm::initParameters( const QVariantMap & )
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{
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std::unique_ptr< QgsProcessingParameterDistance> distance = qgis::make_unique< QgsProcessingParameterDistance >( QStringLiteral( "DISTANCE" ),
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QObject::tr( "Distance" ), 0.0, QStringLiteral( "INPUT" ), false, 0 );
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||||
distance->setIsDynamic( true );
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||||
distance->setDynamicPropertyDefinition( QgsPropertyDefinition( QStringLiteral( "DISTANCE" ), QObject::tr( "Distance" ), QgsPropertyDefinition::DoublePositive ) );
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||||
distance->setDynamicLayerParameterName( QStringLiteral( "INPUT" ) );
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||||
addParameter( distance.release() );
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||||
}
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||||
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QgsProcessingFeatureSource::Flag QgsInterpolatePointAlgorithm::sourceFlags() const
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||||
{
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||||
// skip geometry checks - this algorithm doesn't care about invalid geometries
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return QgsProcessingFeatureSource::FlagSkipGeometryValidityChecks;
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}
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bool QgsInterpolatePointAlgorithm::prepareAlgorithm( const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingFeedback * )
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||||
{
|
||||
mDistance = parameterAsDouble( parameters, QStringLiteral( "DISTANCE" ), context );
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||||
mDynamicDistance = QgsProcessingParameters::isDynamic( parameters, QStringLiteral( "DISTANCE" ) );
|
||||
if ( mDynamicDistance )
|
||||
mDistanceProperty = parameters.value( QStringLiteral( "DISTANCE" ) ).value< QgsProperty >();
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||||
|
||||
return true;
|
||||
}
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||||
|
||||
QgsFeatureList QgsInterpolatePointAlgorithm::processFeature( const QgsFeature &feature, QgsProcessingContext &context, QgsProcessingFeedback * )
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||||
{
|
||||
QgsFeature f = feature;
|
||||
if ( f.hasGeometry() )
|
||||
{
|
||||
const QgsGeometry geometry = f.geometry();
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||||
double distance = mDistance;
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||||
if ( mDynamicDistance )
|
||||
distance = mDistanceProperty.valueAsDouble( context.expressionContext(), distance );
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||||
|
||||
f.setGeometry( geometry.interpolate( distance ) );
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||||
}
|
||||
return QgsFeatureList() << f;
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||||
}
|
||||
|
||||
///@endcond
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||||
|
||||
|
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69
src/analysis/processing/qgsalgorithminterpolatepoint.h
Normal file
69
src/analysis/processing/qgsalgorithminterpolatepoint.h
Normal file
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/***************************************************************************
|
||||
qgsalgorithminterpolatepoint.h
|
||||
---------------------
|
||||
begin : August 2018
|
||||
copyright : (C) 2018 by Nyall Dawson
|
||||
email : nyall dot dawson at gmail dot com
|
||||
***************************************************************************/
|
||||
|
||||
/***************************************************************************
|
||||
* *
|
||||
* This program is free software; you can redistribute it and/or modify *
|
||||
* it under the terms of the GNU General Public License as published by *
|
||||
* the Free Software Foundation; either version 2 of the License, or *
|
||||
* (at your option) any later version. *
|
||||
* *
|
||||
***************************************************************************/
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|
||||
#ifndef QGSINTERPOLATEPOINTALGORITHM_H
|
||||
#define QGSINTERPOLATEPOINTALGORITHM_H
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||||
|
||||
#define SIP_NO_FILE
|
||||
|
||||
#include "qgis.h"
|
||||
#include "qgsprocessingalgorithm.h"
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||||
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||||
///@cond PRIVATE
|
||||
|
||||
/**
|
||||
* Native interpolate point on line algorithm.
|
||||
*/
|
||||
class QgsInterpolatePointAlgorithm : public QgsProcessingFeatureBasedAlgorithm
|
||||
{
|
||||
|
||||
public:
|
||||
|
||||
QgsInterpolatePointAlgorithm() = default;
|
||||
QString name() const override;
|
||||
QString displayName() const override;
|
||||
QStringList tags() const override;
|
||||
QString group() const override;
|
||||
QString groupId() const override;
|
||||
QString shortHelpString() const override;
|
||||
QString shortDescription() const override;
|
||||
QList<int> inputLayerTypes() const override;
|
||||
QgsProcessing::SourceType outputLayerType() const override;
|
||||
QgsWkbTypes::Type outputWkbType( QgsWkbTypes::Type inputWkbType ) const override;
|
||||
QgsInterpolatePointAlgorithm *createInstance() const override SIP_FACTORY;
|
||||
void initParameters( const QVariantMap &configuration = QVariantMap() ) override;
|
||||
|
||||
protected:
|
||||
QString outputName() const override;
|
||||
QgsProcessingFeatureSource::Flag sourceFlags() const override;
|
||||
bool prepareAlgorithm( const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingFeedback *feedback ) override;
|
||||
QgsFeatureList processFeature( const QgsFeature &feature, QgsProcessingContext &, QgsProcessingFeedback *feedback ) override;
|
||||
|
||||
private:
|
||||
|
||||
double mDistance = 0.0;
|
||||
bool mDynamicDistance = false;
|
||||
QgsProperty mDistanceProperty;
|
||||
|
||||
};
|
||||
|
||||
|
||||
///@endcond PRIVATE
|
||||
|
||||
#endif // QGSINTERPOLATEPOINTALGORITHM_H
|
||||
|
||||
|
||||
@ -46,6 +46,7 @@
|
||||
#include "qgsalgorithmjoinbyattribute.h"
|
||||
#include "qgsalgorithmjoinwithlines.h"
|
||||
#include "qgsalgorithmimportphotos.h"
|
||||
#include "qgsalgorithminterpolatepoint.h"
|
||||
#include "qgsalgorithmintersection.h"
|
||||
#include "qgsalgorithmkmeansclustering.h"
|
||||
#include "qgsalgorithmlineintersection.h"
|
||||
@ -167,6 +168,7 @@ void QgsNativeAlgorithms::loadAlgorithms()
|
||||
addAlgorithm( new QgsFilterVerticesByZ() );
|
||||
addAlgorithm( new QgsFixGeometriesAlgorithm() );
|
||||
addAlgorithm( new QgsImportPhotosAlgorithm() );
|
||||
addAlgorithm( new QgsInterpolatePointAlgorithm() );
|
||||
addAlgorithm( new QgsIntersectionAlgorithm() );
|
||||
addAlgorithm( new QgsJoinByAttributeAlgorithm() );
|
||||
addAlgorithm( new QgsJoinWithLinesAlgorithm() );
|
||||
|
||||
Loading…
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Reference in New Issue
Block a user