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[FEATURE][processing] Add 'Project points (cartesian)' algorithm
Projects points from an input point layer by a specified distance and bearing (azimuth). Supports dynamic parameters for the distance and bearing so that they can use field values or expressions.
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<?xml version="1.0" encoding="utf-8" ?> | ||
<ogr:FeatureCollection | ||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" | ||
xsi:schemaLocation="http://ogr.maptools.org/ projected_multipoints.xsd" | ||
xmlns:ogr="http://ogr.maptools.org/" | ||
xmlns:gml="http://www.opengis.net/gml"> | ||
<gml:boundedBy> | ||
<gml:Box> | ||
<gml:coord><gml:X>-0.5</gml:X><gml:Y>-5</gml:Y></gml:coord> | ||
<gml:coord><gml:X>7.5</gml:X><gml:Y>3</gml:Y></gml:coord> | ||
</gml:Box> | ||
</gml:boundedBy> | ||
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<gml:featureMember> | ||
<ogr:projected_multipoints fid="points.9"> | ||
<ogr:d>5</ogr:d> | ||
</ogr:projected_multipoints> | ||
</gml:featureMember> | ||
<gml:featureMember> | ||
<ogr:projected_multipoints fid="points.0"> | ||
<ogr:geometryProperty><gml:MultiPoint srsName="EPSG:4326"><gml:pointMember><gml:Point><gml:coordinates>0.5,1.0</gml:coordinates></gml:Point></gml:pointMember><gml:pointMember><gml:Point><gml:coordinates>1.5,2.0</gml:coordinates></gml:Point></gml:pointMember><gml:pointMember><gml:Point><gml:coordinates>2.5,3.0</gml:coordinates></gml:Point></gml:pointMember></gml:MultiPoint></ogr:geometryProperty> | ||
<ogr:d>1</ogr:d> | ||
</ogr:projected_multipoints> | ||
</gml:featureMember> | ||
<gml:featureMember> | ||
<ogr:projected_multipoints fid="points.3"> | ||
<ogr:geometryProperty><gml:MultiPoint srsName="EPSG:4326"><gml:pointMember><gml:Point><gml:coordinates>4.5,2.0</gml:coordinates></gml:Point></gml:pointMember><gml:pointMember><gml:Point><gml:coordinates>3.5,1.0</gml:coordinates></gml:Point></gml:pointMember></gml:MultiPoint></ogr:geometryProperty> | ||
<ogr:d>2</ogr:d> | ||
</ogr:projected_multipoints> | ||
</gml:featureMember> | ||
<gml:featureMember> | ||
<ogr:projected_multipoints fid="points.5"> | ||
<ogr:geometryProperty><gml:MultiPoint srsName="EPSG:4326"><gml:pointMember><gml:Point><gml:coordinates>-0.5,-5.0</gml:coordinates></gml:Point></gml:pointMember><gml:pointMember><gml:Point><gml:coordinates>7.5,-1.0</gml:coordinates></gml:Point></gml:pointMember></gml:MultiPoint></ogr:geometryProperty> | ||
<ogr:d>3</ogr:d> | ||
</ogr:projected_multipoints> | ||
</gml:featureMember> | ||
<gml:featureMember> | ||
<ogr:projected_multipoints fid="points.7"> | ||
<ogr:geometryProperty><gml:MultiPoint srsName="EPSG:4326"><gml:pointMember><gml:Point><gml:coordinates>6.5,-1.0</gml:coordinates></gml:Point></gml:pointMember><gml:pointMember><gml:Point><gml:coordinates>-0.5,-1.0</gml:coordinates></gml:Point></gml:pointMember></gml:MultiPoint></ogr:geometryProperty> | ||
<ogr:d>4</ogr:d> | ||
</ogr:projected_multipoints> | ||
</gml:featureMember> | ||
</ogr:FeatureCollection> |
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<?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="projected_multipoints" type="ogr:projected_multipoints_Type" substitutionGroup="gml:_Feature"/> | ||
<xs:complexType name="projected_multipoints_Type"> | ||
<xs:complexContent> | ||
<xs:extension base="gml:AbstractFeatureType"> | ||
<xs:sequence> | ||
<xs:element name="geometryProperty" type="gml:MultiPointPropertyType" nillable="true" minOccurs="0" maxOccurs="1"/> | ||
<xs:element name="d" 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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<?xml version="1.0" encoding="utf-8" ?> | ||
<ogr:FeatureCollection | ||
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" | ||
xsi:schemaLocation="http://ogr.maptools.org/ projected_points.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>-5</gml:Y></gml:coord> | ||
<gml:coord><gml:X>9</gml:X><gml:Y>3</gml:Y></gml:coord> | ||
</gml:Box> | ||
</gml:boundedBy> | ||
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<gml:featureMember> | ||
<ogr:projected_points fid="points.0"> | ||
<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>2,1</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
<ogr:id>1</ogr:id> | ||
<ogr:id2>2</ogr:id2> | ||
</ogr:projected_points> | ||
</gml:featureMember> | ||
<gml:featureMember> | ||
<ogr:projected_points fid="points.1"> | ||
<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>4,3</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
<ogr:id>2</ogr:id> | ||
<ogr:id2>1</ogr:id2> | ||
</ogr:projected_points> | ||
</gml:featureMember> | ||
<gml:featureMember> | ||
<ogr:projected_points fid="points.2"> | ||
<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>3,2</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
<ogr:id>3</ogr:id> | ||
<ogr:id2>0</ogr:id2> | ||
</ogr:projected_points> | ||
</gml:featureMember> | ||
<gml:featureMember> | ||
<ogr:projected_points fid="points.3"> | ||
<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>6,2</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
<ogr:id>4</ogr:id> | ||
<ogr:id2>2</ogr:id2> | ||
</ogr:projected_points> | ||
</gml:featureMember> | ||
<gml:featureMember> | ||
<ogr:projected_points fid="points.4"> | ||
<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>5,1</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
<ogr:id>5</ogr:id> | ||
<ogr:id2>1</ogr:id2> | ||
</ogr:projected_points> | ||
</gml:featureMember> | ||
<gml:featureMember> | ||
<ogr:projected_points fid="points.5"> | ||
<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>1,-5</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
<ogr:id>6</ogr:id> | ||
<ogr:id2>0</ogr:id2> | ||
</ogr:projected_points> | ||
</gml:featureMember> | ||
<gml:featureMember> | ||
<ogr:projected_points fid="points.6"> | ||
<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>9.0,-1.0</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
<ogr:id>7</ogr:id> | ||
<ogr:id2>0</ogr:id2> | ||
</ogr:projected_points> | ||
</gml:featureMember> | ||
<gml:featureMember> | ||
<ogr:projected_points fid="points.7"> | ||
<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>8.0,-1.0</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
<ogr:id>8</ogr:id> | ||
<ogr:id2>0</ogr:id2> | ||
</ogr:projected_points> | ||
</gml:featureMember> | ||
<gml:featureMember> | ||
<ogr:projected_points fid="points.8"> | ||
<ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>1.0,-1.0</gml:coordinates></gml:Point></ogr:geometryProperty> | ||
<ogr:id>9</ogr:id> | ||
<ogr:id2>0</ogr:id2> | ||
</ogr:projected_points> | ||
</gml:featureMember> | ||
</ogr:FeatureCollection> |
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<?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="projected_points" type="ogr:projected_points_Type" substitutionGroup="gml:_Feature"/> | ||
<xs:complexType name="projected_points_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:sequence> | ||
</xs:extension> | ||
</xs:complexContent> | ||
</xs:complexType> | ||
</xs:schema> |
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/*************************************************************************** | ||
qgsalgorithmprojectpointcartesian.cpp | ||
--------------------- | ||
begin : April 2017 | ||
copyright : (C) 2017 by Nyall Dawson | ||
email : nyall dot dawson at gmail dot com | ||
***************************************************************************/ | ||
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/*************************************************************************** | ||
* * | ||
* 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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#include "qgsalgorithmprojectpointcartesian.h" | ||
#include "qgsmultipoint.h" | ||
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///@cond PRIVATE | ||
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QString QgsProjectPointCartesianAlgorithm::name() const | ||
{ | ||
return QStringLiteral( "projectpointcartesian" ); | ||
} | ||
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QString QgsProjectPointCartesianAlgorithm::displayName() const | ||
{ | ||
return QObject::tr( "Project points (Cartesian)" ); | ||
} | ||
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QStringList QgsProjectPointCartesianAlgorithm::tags() const | ||
{ | ||
return QObject::tr( "bearing,azimuth,distance,angle" ).split( ',' ); | ||
} | ||
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QString QgsProjectPointCartesianAlgorithm::group() const | ||
{ | ||
return QObject::tr( "Vector geometry" ); | ||
} | ||
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QString QgsProjectPointCartesianAlgorithm::groupId() const | ||
{ | ||
return QStringLiteral( "vectorgeometry" ); | ||
} | ||
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QString QgsProjectPointCartesianAlgorithm::outputName() const | ||
{ | ||
return QObject::tr( "Projected" ); | ||
} | ||
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QString QgsProjectPointCartesianAlgorithm::shortHelpString() const | ||
{ | ||
return QObject::tr( "This algorithm projects point geometries by a specified distance and bearing (azimuth), creating a new point layer with the projected points.\n\n" | ||
"The distance is specified in layer units, and the bearing in degrees clockwise from North." ); | ||
} | ||
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QList<int> QgsProjectPointCartesianAlgorithm::inputLayerTypes() const | ||
{ | ||
return QList<int>() << QgsProcessing::TypeVectorPoint; | ||
} | ||
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QgsProcessing::SourceType QgsProjectPointCartesianAlgorithm::outputLayerType() const | ||
{ | ||
return QgsProcessing::TypeVectorPoint; | ||
} | ||
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QgsProjectPointCartesianAlgorithm *QgsProjectPointCartesianAlgorithm::createInstance() const | ||
{ | ||
return new QgsProjectPointCartesianAlgorithm(); | ||
} | ||
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void QgsProjectPointCartesianAlgorithm::initParameters( const QVariantMap & ) | ||
{ | ||
std::unique_ptr< QgsProcessingParameterNumber > bearing = qgis::make_unique< QgsProcessingParameterNumber >( QStringLiteral( "BEARING" ), QObject::tr( "Bearing (degrees from North)" ), QgsProcessingParameterNumber::Double, false ); | ||
bearing->setIsDynamic( true ); | ||
bearing->setDynamicPropertyDefinition( QgsPropertyDefinition( QStringLiteral( "Bearing" ), QObject::tr( "Bearing (degrees from North)" ), QgsPropertyDefinition::Double ) ); | ||
bearing->setDynamicLayerParameterName( QStringLiteral( "INPUT" ) ); | ||
addParameter( bearing.release() ); | ||
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std::unique_ptr< QgsProcessingParameterNumber > distance = qgis::make_unique< QgsProcessingParameterNumber >( QStringLiteral( "DISTANCE" ), QObject::tr( "Distance" ), QgsProcessingParameterNumber::Double, false ); | ||
distance->setIsDynamic( true ); | ||
distance->setDynamicPropertyDefinition( QgsPropertyDefinition( QStringLiteral( "Distance" ), QObject::tr( "Projection distance" ), QgsPropertyDefinition::Double ) ); | ||
distance->setDynamicLayerParameterName( QStringLiteral( "INPUT" ) ); | ||
addParameter( distance.release() ); | ||
} | ||
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bool QgsProjectPointCartesianAlgorithm::prepareAlgorithm( const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingFeedback * ) | ||
{ | ||
mBearing = parameterAsDouble( parameters, QStringLiteral( "BEARING" ), context ); | ||
mDynamicBearing = QgsProcessingParameters::isDynamic( parameters, QStringLiteral( "BEARING" ) ); | ||
if ( mDynamicBearing ) | ||
mBearingProperty = parameters.value( QStringLiteral( "BEARING" ) ).value< QgsProperty >(); | ||
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mDistance = parameterAsDouble( parameters, QStringLiteral( "DISTANCE" ), context ); | ||
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 QgsProjectPointCartesianAlgorithm::processFeature( const QgsFeature &feature, QgsProcessingContext &context, QgsProcessingFeedback * ) | ||
{ | ||
QgsFeature f = feature; | ||
if ( f.hasGeometry() && QgsWkbTypes::geometryType( f.geometry().wkbType() ) == QgsWkbTypes::PointGeometry ) | ||
{ | ||
double distance = mDistance; | ||
if ( mDynamicDistance ) | ||
distance = mDistanceProperty.valueAsDouble( context.expressionContext(), distance ); | ||
double bearing = mBearing; | ||
if ( mDynamicBearing ) | ||
bearing = mBearingProperty.valueAsDouble( context.expressionContext(), bearing ); | ||
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QgsGeometry g = f.geometry(); | ||
if ( QgsWkbTypes::isMultiType( g.wkbType() ) ) | ||
{ | ||
const QgsMultiPoint *mp = static_cast< const QgsMultiPoint * >( g.constGet() ); | ||
std::unique_ptr< QgsMultiPoint > result = qgis::make_unique< QgsMultiPoint >(); | ||
for ( int i = 0; i < mp->numGeometries(); ++i ) | ||
{ | ||
const QgsPoint *p = static_cast< const QgsPoint * >( mp->geometryN( i ) ); | ||
result->addGeometry( p->project( distance, bearing ).clone() ); | ||
} | ||
f.setGeometry( QgsGeometry( std::move( result ) ) ); | ||
} | ||
else | ||
{ | ||
const QgsPoint *p = static_cast< const QgsPoint * >( g.constGet() ); | ||
QgsPoint result = p->project( distance, bearing ); | ||
f.setGeometry( QgsGeometry( result.clone() ) ); | ||
} | ||
} | ||
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return QgsFeatureList() << f; | ||
} | ||
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///@endcond | ||
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