QGIS API Documentation  2.99.0-Master (f1c3692)
Classes | Public Types | Static Public Member Functions | List of all members
QgsOgcUtils Class Reference

The QgsOgcUtils class provides various utility functions for conversion between OGC (Open Geospatial Consortium) standards and QGIS internal representations. More...

#include <qgsogcutils.h>

Classes

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. More...
 
static QgsExpression * expressionFromOgcFilter (const QDomElement &element)
 Parse XML with OGC filter into QGIS expression. More...
 
static QDomElement expressionToOgcExpression (const QgsExpression &exp, QDomDocument &doc, QString *errorMessage=nullptr)
 Creates an OGC expression XML element. More...
 
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)
 Creates an OGC expression XML element. More...
 
static QDomElement expressionToOgcFilter (const QgsExpression &exp, QDomDocument &doc, QString *errorMessage=nullptr)
 Creates OGC filter XML element. More...
 
static QDomElement expressionToOgcFilter (const QgsExpression &exp, QDomDocument &doc, QgsOgcUtils::GMLVersion gmlVersion, FilterVersion filterVersion, const QString &geometryName, const QString &srsName, bool honourAxisOrientation, bool invertAxisOrientation, QString *errorMessage=nullptr)
 Creates OGC filter XML element. More...
 
static QgsGeometry geometryFromGML (const QString &xmlString)
 Static method that creates geometry from GML. More...
 
static QgsGeometry geometryFromGML (const QDomNode &geometryNode)
 Static method that creates geometry from GML. More...
 
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. More...
 
static QDomElement geometryToGML (const QgsGeometry &geometry, QDomDocument &doc, const QString &format, int precision=17)
 Exports the geometry to GML2 or GML3. More...
 
static QDomElement geometryToGML (const QgsGeometry &geometry, QDomDocument &doc, int precision=17)
 Exports the geometry to GML2. More...
 
static QgsRectangle rectangleFromGMLBox (const QDomNode &boxNode)
 Read rectangle from GML2 Box. More...
 
static QgsRectangle rectangleFromGMLEnvelope (const QDomNode &envelopeNode)
 Read rectangle from GML3 Envelope. More...
 
static QDomElement rectangleToGMLBox (QgsRectangle *box, QDomDocument &doc, int precision=17)
 Exports the rectangle to GML2 Box. More...
 
static QDomElement rectangleToGMLBox (QgsRectangle *box, QDomDocument &doc, const QString &srsName, bool invertAxisOrientation, int precision=17)
 Exports the rectangle to GML2 Box. More...
 
static QDomElement rectangleToGMLEnvelope (QgsRectangle *env, QDomDocument &doc, int precision=17)
 Exports the rectangle to GML3 Envelope. More...
 
static QDomElement rectangleToGMLEnvelope (QgsRectangle *env, QDomDocument &doc, const QString &srsName, bool invertAxisOrientation, int precision=17)
 Exports the rectangle to GML3 Envelope. More...
 
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)
 Creates OGC filter XML element from the WHERE and JOIN clauses of a SQL statement. More...
 

Detailed Description

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 49 of file qgsogcutils.h.

Member Enumeration Documentation

◆ FilterVersion

OGC filter version.

Enumerator
FILTER_OGC_1_0 
FILTER_OGC_1_1 
FILTER_FES_2_0 

Definition at line 156 of file qgsogcutils.h.

◆ GMLVersion

GML version.

Enumerator
GML_2_1_2 
GML_3_1_0 
GML_3_2_1 

Definition at line 56 of file qgsogcutils.h.

Member Function Documentation

◆ colorFromOgcFill()

QColor QgsOgcUtils::colorFromOgcFill ( const QDomElement &  fillElement)
static

Parse XML with OGC fill into QColor.

Definition at line 1562 of file qgsogcutils.cpp.

◆ expressionFromOgcFilter()

QgsExpression * QgsOgcUtils::expressionFromOgcFilter ( const QDomElement &  element)
static

Parse XML with OGC filter into QGIS expression.

Definition at line 1601 of file qgsogcutils.cpp.

◆ expressionToOgcExpression() [1/2]

QDomElement QgsOgcUtils::expressionToOgcExpression ( const QgsExpression &  exp,
QDomDocument &  doc,
QString *  errorMessage = nullptr 
)
static

Creates an OGC expression XML element.

Returns
valid OGC expression QDomElement on success, otherwise null QDomElement

Definition at line 2118 of file qgsogcutils.cpp.

◆ expressionToOgcExpression() [2/2]

QDomElement QgsOgcUtils::expressionToOgcExpression ( const QgsExpression &  exp,
QDomDocument &  doc,
QgsOgcUtils::GMLVersion  gmlVersion,
FilterVersion  filterVersion,
const QString &  geometryName,
const QString &  srsName,
bool  honourAxisOrientation,
bool  invertAxisOrientation,
QString *  errorMessage = nullptr 
)
static

Creates an OGC expression XML element.

Returns
valid OGC expression QDomElement on success, otherwise null QDomElement

Definition at line 2161 of file qgsogcutils.cpp.

◆ expressionToOgcFilter() [1/2]

QDomElement QgsOgcUtils::expressionToOgcFilter ( const QgsExpression &  exp,
QDomDocument &  doc,
QString *  errorMessage = nullptr 
)
static

Creates OGC filter XML element.

Supports minimum standard filter according to the OGC filter specs (=,!=,<,>,<=,>=,AND,OR,NOT)

Returns
valid
<Filter> 
QDomElement on success, otherwise null QDomElement

Definition at line 2112 of file qgsogcutils.cpp.

◆ expressionToOgcFilter() [2/2]

QDomElement QgsOgcUtils::expressionToOgcFilter ( const QgsExpression &  exp,
QDomDocument &  doc,
QgsOgcUtils::GMLVersion  gmlVersion,
FilterVersion  filterVersion,
const QString &  geometryName,
const QString &  srsName,
bool  honourAxisOrientation,
bool  invertAxisOrientation,
QString *  errorMessage = nullptr 
)
static

Creates OGC filter XML element.

Supports minimum standard filter according to the OGC filter specs (=,!=,<,>,<=,>=,AND,OR,NOT)

Returns
valid
<Filter> 
QDomElement on success, otherwise null QDomElement
Since
QGIS 2.16
Note
not available in Python bindings

Definition at line 2124 of file qgsogcutils.cpp.

◆ geometryFromGML() [1/2]

QgsGeometry QgsOgcUtils::geometryFromGML ( const QString &  xmlString)
static

Static method that creates geometry from GML.

Parameters
xmlStringxml representation of the geometry. GML elements are expected to be in default namespace (
{<Point>...</Point> 
) or in "gml" namespace (
<gml:Point>...</gml:Point> 
)

Definition at line 134 of file qgsogcutils.cpp.

◆ geometryFromGML() [2/2]

QgsGeometry QgsOgcUtils::geometryFromGML ( const QDomNode &  geometryNode)
static

Static method that creates geometry from GML.

Definition at line 73 of file qgsogcutils.cpp.

◆ geometryToGML() [1/3]

QDomElement QgsOgcUtils::geometryToGML ( const QgsGeometry geometry,
QDomDocument &  doc,
QgsOgcUtils::GMLVersion  gmlVersion,
const QString &  srsName,
bool  invertAxisOrientation,
const QString &  gmlIdBase,
int  precision = 17 
)
static

Exports the geometry to GML.

Returns
QDomElement
Since
QGIS 2.16

Definition at line 1130 of file qgsogcutils.cpp.

◆ geometryToGML() [2/3]

QDomElement QgsOgcUtils::geometryToGML ( const QgsGeometry geometry,
QDomDocument &  doc,
const QString &  format,
int  precision = 17 
)
static

Exports the geometry to GML2 or GML3.

Returns
QDomElement

Definition at line 1125 of file qgsogcutils.cpp.

◆ geometryToGML() [3/3]

QDomElement QgsOgcUtils::geometryToGML ( const QgsGeometry geometry,
QDomDocument &  doc,
int  precision = 17 
)
static

Exports the geometry to GML2.

Returns
QDomElement

Definition at line 1504 of file qgsogcutils.cpp.

◆ rectangleFromGMLBox()

QgsRectangle QgsOgcUtils::rectangleFromGMLBox ( const QDomNode &  boxNode)
static

Read rectangle from GML2 Box.

Definition at line 884 of file qgsogcutils.cpp.

◆ rectangleFromGMLEnvelope()

QgsRectangle QgsOgcUtils::rectangleFromGMLEnvelope ( const QDomNode &  envelopeNode)
static

Read rectangle from GML3 Envelope.

Definition at line 965 of file qgsogcutils.cpp.

◆ rectangleToGMLBox() [1/2]

QDomElement QgsOgcUtils::rectangleToGMLBox ( QgsRectangle box,
QDomDocument &  doc,
int  precision = 17 
)
static

Exports the rectangle to GML2 Box.

Returns
QDomElement

Definition at line 1044 of file qgsogcutils.cpp.

◆ rectangleToGMLBox() [2/2]

QDomElement QgsOgcUtils::rectangleToGMLBox ( QgsRectangle box,
QDomDocument &  doc,
const QString &  srsName,
bool  invertAxisOrientation,
int  precision = 17 
)
static

Exports the rectangle to GML2 Box.

Returns
QDomElement
Since
QGIS 2.16

Definition at line 1049 of file qgsogcutils.cpp.

◆ rectangleToGMLEnvelope() [1/2]

QDomElement QgsOgcUtils::rectangleToGMLEnvelope ( QgsRectangle env,
QDomDocument &  doc,
int  precision = 17 
)
static

Exports the rectangle to GML3 Envelope.

Returns
QDomElement

Definition at line 1084 of file qgsogcutils.cpp.

◆ rectangleToGMLEnvelope() [2/2]

QDomElement QgsOgcUtils::rectangleToGMLEnvelope ( QgsRectangle env,
QDomDocument &  doc,
const QString &  srsName,
bool  invertAxisOrientation,
int  precision = 17 
)
static

Exports the rectangle to GML3 Envelope.

Returns
QDomElement
Since
QGIS 2.16

Definition at line 1089 of file qgsogcutils.cpp.

◆ SQLStatementToOgcFilter()

QDomElement QgsOgcUtils::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 
)
static

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

Returns
valid
<Filter> 
QDomElement on success, otherwise null QDomElement
Since
QGIS 2.16
Note
not available in Python bindings

Definition at line 2200 of file qgsogcutils.cpp.


The documentation for this class was generated from the following files: