QGIS API Documentation 3.41.0-Master (d5b93354e9c)
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The QgsOgcUtils class provides various utility functions for conversion between OGC (Open Geospatial Consortium) standards and QGIS internal representations. More...
#include <qgsogcutils.h>
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struct | Context |
The Context struct stores the current layer and coordinate transform context. More... | |
class | LayerProperties |
Layer properties. More... | |
Public Types | |
enum | FilterVersion { FILTER_OGC_1_0 , FILTER_OGC_1_1 , FILTER_FES_2_0 } |
OGC filter version. More... | |
enum | GMLVersion { GML_2_1_2 , GML_3_1_0 , GML_3_2_1 } |
GML version. More... | |
Static Public Member Functions | |
static QColor | colorFromOgcFill (const QDomElement &fillElement) |
Parse XML with OGC fill into QColor. | |
static QDomElement | elseFilterExpression (QDomDocument &doc) |
Creates an ElseFilter from doc. | |
static QgsExpression * | expressionFromOgcFilter (const QDomElement &element, FilterVersion version, QgsVectorLayer *layer=nullptr) |
Returns an expression from a WFS filter embedded in a document. | |
static QgsExpression * | expressionFromOgcFilter (const QDomElement &element, QgsVectorLayer *layer=nullptr) |
Parse XML with OGC filter into QGIS expression. | |
static QDomElement | expressionToOgcExpression (const QgsExpression &exp, QDomDocument &doc, QgsOgcUtils::GMLVersion gmlVersion, FilterVersion filterVersion, const QString &geometryName, const QString &srsName, bool honourAxisOrientation, bool invertAxisOrientation, QString *errorMessage=nullptr, bool requiresFilterElement=false, const QMap< QString, QString > &fieldNameToXPathMap=QMap< QString, QString >(), const QMap< QString, QString > &namespacePrefixToUriMap=QMap< QString, QString >()) |
Creates an OGC expression XML element from the exp expression. | |
static QDomElement | expressionToOgcExpression (const QgsExpression &exp, QDomDocument &doc, QString *errorMessage=nullptr, bool requiresFilterElement=false) |
Creates an OGC expression XML element from the exp expression with default values for the geometry name, srs name, honourAsisOrientation and invertAxisOrientation. | |
static QDomElement | expressionToOgcFilter (const QgsExpression &exp, QDomDocument &doc, QgsOgcUtils::GMLVersion gmlVersion, FilterVersion filterVersion, const QString &namespacePrefix, const QString &namespaceURI, const QString &geometryName, const QString &srsName, bool honourAxisOrientation, bool invertAxisOrientation, QString *errorMessage=nullptr, const QMap< QString, QString > &fieldNameToXPathMap=QMap< QString, QString >(), const QMap< QString, QString > &namespacePrefixToUriMap=QMap< QString, QString >()) |
Creates OGC filter XML element. | |
static QDomElement | expressionToOgcFilter (const QgsExpression &exp, QDomDocument &doc, QString *errorMessage=nullptr) |
Creates OGC filter XML element. | |
static QgsGeometry | geometryFromGML (const QDomNode &geometryNode, const QgsOgcUtils::Context &context=QgsOgcUtils::Context()) |
Static method that creates geometry from GML. | |
static QgsGeometry | geometryFromGML (const QString &xmlString, const QgsOgcUtils::Context &context=QgsOgcUtils::Context()) |
Static method that creates geometry from GML. | |
static QDomElement | geometryToGML (const QgsGeometry &geometry, QDomDocument &doc, const QString &format, int precision=17) |
Exports the geometry to GML2 or GML3. | |
static QDomElement | geometryToGML (const QgsGeometry &geometry, QDomDocument &doc, int precision=17) |
Exports the geometry to GML2. | |
static QDomElement | geometryToGML (const QgsGeometry &geometry, QDomDocument &doc, QgsOgcUtils::GMLVersion gmlVersion, const QString &srsName, bool invertAxisOrientation, const QString &gmlIdBase, int precision=17) |
Exports the geometry to GML. | |
static QgsRectangle | rectangleFromGMLBox (const QDomNode &boxNode) |
Read rectangle from GML2 Box. | |
static QgsRectangle | rectangleFromGMLEnvelope (const QDomNode &envelopeNode) |
Read rectangle from GML3 Envelope. | |
static QDomElement | rectangleToGMLBox (QgsRectangle *box, QDomDocument &doc, const QString &srsName, bool invertAxisOrientation, int precision=17) |
Exports the rectangle to GML2 Box. | |
static QDomElement | rectangleToGMLBox (QgsRectangle *box, QDomDocument &doc, int precision=17) |
Exports the rectangle to GML2 Box. | |
static QDomElement | rectangleToGMLEnvelope (QgsRectangle *env, QDomDocument &doc, const QString &srsName, bool invertAxisOrientation, int precision=17) |
Exports the rectangle to GML3 Envelope. | |
static QDomElement | rectangleToGMLEnvelope (QgsRectangle *env, QDomDocument &doc, int precision=17) |
Exports the rectangle to GML3 Envelope. | |
static QDomElement | SQLStatementToOgcFilter (const QgsSQLStatement &statement, QDomDocument &doc, QgsOgcUtils::GMLVersion gmlVersion, FilterVersion filterVersion, const QList< LayerProperties > &layerProperties, bool honourAxisOrientation, bool invertAxisOrientation, const QMap< QString, QString > &mapUnprefixedTypenameToPrefixedTypename, QString *errorMessage=nullptr, const QMap< QString, QString > &fieldNameToXPathMap=QMap< QString, QString >(), const QMap< QString, QString > &namespacePrefixToUriMap=QMap< QString, QString >()) |
Creates OGC filter XML element from the WHERE and JOIN clauses of a SQL statement. | |
The QgsOgcUtils class provides various utility functions for conversion between OGC (Open Geospatial Consortium) standards and QGIS internal representations.
Currently supported standards:
Definition at line 53 of file qgsogcutils.h.
OGC filter version.
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FILTER_OGC_1_0 | |
FILTER_OGC_1_1 | |
FILTER_FES_2_0 |
Definition at line 177 of file qgsogcutils.h.
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Parse XML with OGC fill into QColor.
Definition at line 1648 of file qgsogcutils.cpp.
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Creates an ElseFilter from doc.
Definition at line 1884 of file qgsogcutils.cpp.
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Returns an expression from a WFS filter embedded in a document.
element | The WFS Filter |
version | The WFS version |
layer | Layer to use to retrieve field values from literal filters |
Definition at line 1692 of file qgsogcutils.cpp.
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Parse XML with OGC filter into QGIS expression.
Definition at line 1687 of file qgsogcutils.cpp.
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Creates an OGC expression XML element from the exp expression.
<Filter>QDomElement when requiresFilterElement is set. otherwise null QDomElement
Definition at line 1931 of file qgsogcutils.cpp.
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Creates an OGC expression XML element from the exp expression with default values for the geometry name, srs name, honourAsisOrientation and invertAxisOrientation.
<Filter>QDomElement when requiresFilterElement is set. otherwise null QDomElement
Definition at line 1878 of file qgsogcutils.cpp.
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Creates OGC filter XML element.
Supports minimum standard filter according to the OGC filter specs (=,!=,<,>,<=,>=,AND,OR,NOT)
<Filter>QDomElement on success, otherwise null QDomElement
Definition at line 1890 of file qgsogcutils.cpp.
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Creates OGC filter XML element.
Supports minimum standard filter according to the OGC filter specs (=,!=,<,>,<=,>=,AND,OR,NOT)
<Filter>QDomElement on success, otherwise null QDomElement
Definition at line 1872 of file qgsogcutils.cpp.
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Static method that creates geometry from GML.
Definition at line 87 of file qgsogcutils.cpp.
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Static method that creates geometry from GML.
xmlString | xml representation of the geometry. GML elements are expected to be in default namespace ({<Point>...</Point>) or in "gml" namespace ( <gml:Point>...</gml:Point>) |
context | QgsOgcUtils context |
Definition at line 197 of file qgsogcutils.cpp.
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Exports the geometry to GML2 or GML3.
Definition at line 1209 of file qgsogcutils.cpp.
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Read rectangle from GML2 Box.
Definition at line 968 of file qgsogcutils.cpp.
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Read rectangle from GML3 Envelope.
Definition at line 1049 of file qgsogcutils.cpp.
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Exports the rectangle to GML2 Box.
Definition at line 1133 of file qgsogcutils.cpp.
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Exports the rectangle to GML2 Box.
Definition at line 1128 of file qgsogcutils.cpp.
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Exports the rectangle to GML3 Envelope.
Definition at line 1173 of file qgsogcutils.cpp.
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Exports the rectangle to GML3 Envelope.
Definition at line 1168 of file qgsogcutils.cpp.
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Creates OGC filter XML element from the WHERE and JOIN clauses of a SQL statement.
Supports minimum standard filter according to the OGC filter specs (=,!=,<,>,<=,>=,AND,OR,NOT,LIKE,BETWEEN,IN) Supports layer joins. Supports ST_GeometryFromText(wkt[, srid/srsname]), ST_MakeEnvelope(xmin,ymin,xmax,ymax[, srid/srsname]) ST_GeomFromGML(serialized_gml_string) BBOX() ST_Intersects(), ST_Contains(), ST_Crosses(), ST_Equals(), ST_Disjoint(), ST_Overlaps(), ST_Touches(), ST_Within() ST_DWithin(), ST_Beyond() custom functions
<Filter>QDomElement on success, otherwise null QDomElement
Definition at line 1989 of file qgsogcutils.cpp.