QGIS API Documentation
3.20.0-Odense (decaadbb31)
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Utilities for working with OGR features and layers. More...
#include <qgsogrutils.h>
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static QStringList | cStringListToQStringList (char **stringList) |
Converts a c string list to a QStringList. More... | |
static QVariant | getOgrFeatureAttribute (OGRFeatureH ogrFet, const QgsField &field, int attIndex, QTextCodec *encoding, bool *ok=nullptr) |
Retrieves an attribute value from an OGR feature, using a provided field definition. More... | |
static QVariant | getOgrFeatureAttribute (OGRFeatureH ogrFet, const QgsFields &fields, int attIndex, QTextCodec *encoding, bool *ok=nullptr) |
Retrieves an attribute value from an OGR feature. More... | |
static QVariant | OGRFieldtoVariant (const OGRField *value, OGRFieldType type) |
Converts an OGRField value of the specified type into a QVariant. More... | |
static QgsGeometry | ogrGeometryToQgsGeometry (OGRGeometryH geom) |
Converts an OGR geometry representation to a QgsGeometry object. More... | |
static QgsWkbTypes::Type | ogrGeometryTypeToQgsWkbType (OGRwkbGeometryType ogrGeomType) |
Converts a OGRwkbGeometryType to QgsWkbTypes::Type. More... | |
static QgsCoordinateReferenceSystem | OGRSpatialReferenceToCrs (OGRSpatialReferenceH srs) |
Returns a QgsCoordinateReferenceSystem corresponding to the specified OGR srs object, or an invalid QgsCoordinateReferenceSystem if srs could not be converted. More... | |
static QString | OGRSpatialReferenceToWkt (OGRSpatialReferenceH srs) |
Returns a WKT string corresponding to the specified OGR srs object. More... | |
static QVariantMap | parseStyleString (const QString &string) |
Parses an OGR style string to a variant map containing the style string components. More... | |
static QgsFeature | readOgrFeature (OGRFeatureH ogrFet, const QgsFields &fields, QTextCodec *encoding) |
Reads an OGR feature and converts it to a QgsFeature. More... | |
static bool | readOgrFeatureAttributes (OGRFeatureH ogrFet, const QgsFields &fields, QgsFeature &feature, QTextCodec *encoding) |
Reads all attributes from an OGR feature into a QgsFeature. More... | |
static bool | readOgrFeatureGeometry (OGRFeatureH ogrFet, QgsFeature &feature) |
Reads the geometry from an OGR feature into a QgsFeature. More... | |
static QgsFields | readOgrFields (OGRFeatureH ogrFet, QTextCodec *encoding) |
Reads an OGR feature and returns a corresponding fields collection. More... | |
static QString | readShapefileEncoding (const QString &path) |
Reads the encoding of the shapefile at the specified path (where path is the location of the ".shp" file). More... | |
static QString | readShapefileEncodingFromCpg (const QString &path) |
Reads the encoding of the shapefile at the specified path (where path is the location of the ".shp" file), from the CPG specified encoding. More... | |
static QString | readShapefileEncodingFromLdid (const QString &path) |
Reads the encoding of the shapefile at the specified path (where path is the location of the ".shp" file), from the DBF LDID encoding. More... | |
static QgsFeatureList | stringToFeatureList (const QString &string, const QgsFields &fields, QTextCodec *encoding) |
Attempts to parse a string representing a collection of features using OGR. More... | |
static QgsFields | stringToFields (const QString &string, QTextCodec *encoding) |
Attempts to retrieve the fields from a string representing a collection of features using OGR. More... | |
static std::unique_ptr< QgsSymbol > | symbolFromStyleString (const QString &string, Qgis::SymbolType type) |
Creates a new QgsSymbol matching an OGR style string. More... | |
Utilities for working with OGR features and layers.
Contains helper utilities for assisting work with both OGR features and layers.
Definition at line 163 of file qgsogrutils.h.
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Converts a c string list to a QStringList.
Presumes a null terminated string list.
Definition at line 925 of file qgsogrutils.cpp.
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Retrieves an attribute value from an OGR feature, using a provided field definition.
ogrFet | OGR feature handle |
field | definition of corresponding field |
attIndex | index of attribute to retrieve from ogrFet |
encoding | text encoding |
ok | optional storage for success of retrieval |
Definition at line 281 of file qgsogrutils.cpp.
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Retrieves an attribute value from an OGR feature.
ogrFet | OGR feature handle |
fields | fields collection corresponding to feature |
attIndex | index of attribute to retrieve |
encoding | text encoding |
ok | optional storage for success of retrieval |
Definition at line 268 of file qgsogrutils.cpp.
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Converts an OGRField value of the specified type into a QVariant.
Definition at line 103 of file qgsogrutils.cpp.
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Converts an OGR geometry representation to a QgsGeometry object.
geom | OGR geometry handle |
Definition at line 714 of file qgsogrutils.cpp.
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Converts a OGRwkbGeometryType to QgsWkbTypes::Type.
Definition at line 628 of file qgsogrutils.cpp.
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Returns a QgsCoordinateReferenceSystem corresponding to the specified OGR srs object, or an invalid QgsCoordinateReferenceSystem if srs could not be converted.
Definition at line 954 of file qgsogrutils.cpp.
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Returns a WKT string corresponding to the specified OGR srs object.
The WKT string format will be selected using the most appropriate format (usually WKT2 if GDAL 3 is available).
Definition at line 938 of file qgsogrutils.cpp.
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Parses an OGR style string to a variant map containing the style string components.
Definition at line 1140 of file qgsogrutils.cpp.
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Reads an OGR feature and converts it to a QgsFeature.
ogrFet | OGR feature handle |
fields | fields collection corresponding to feature |
encoding | text encoding |
Definition at line 186 of file qgsogrutils.cpp.
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Reads all attributes from an OGR feature into a QgsFeature.
ogrFet | OGR feature handle |
fields | fields collection corresponding to feature |
feature | QgsFeature to store attributes in |
encoding | text encoding |
true
if attribute read was successful Definition at line 498 of file qgsogrutils.cpp.
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Reads the geometry from an OGR feature into a QgsFeature.
ogrFet | OGR feature handle |
feature | QgsFeature to store geometry in |
true
if geometry read was successful Definition at line 519 of file qgsogrutils.cpp.
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Reads an OGR feature and returns a corresponding fields collection.
ogrFet | OGR feature handle |
encoding | text encoding |
Definition at line 211 of file qgsogrutils.cpp.
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Reads the encoding of the shapefile at the specified path (where path is the location of the ".shp" file).
This method considers both the CPG specified encoding and the DBF LDID encoding (priority goes to CPG based encoding)
Definition at line 963 of file qgsogrutils.cpp.
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Reads the encoding of the shapefile at the specified path (where path is the location of the ".shp" file), from the CPG specified encoding.
Return an empty string if CPG based encoding was not found.
Definition at line 972 of file qgsogrutils.cpp.
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Reads the encoding of the shapefile at the specified path (where path is the location of the ".shp" file), from the DBF LDID encoding.
Return an empty string if LDID based encoding was not found.
Definition at line 1028 of file qgsogrutils.cpp.
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Attempts to parse a string representing a collection of features using OGR.
For example, this method can be used to convert a GeoJSON encoded collection to a list of QgsFeatures.
string | string to parse |
fields | fields collection to use for parsed features ( |
encoding | text encoding |
Definition at line 843 of file qgsogrutils.cpp.
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Attempts to retrieve the fields from a string representing a collection of features using OGR.
string | string to parse |
encoding | text encoding |
Definition at line 885 of file qgsogrutils.cpp.
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Creates a new QgsSymbol matching an OGR style string.
Definition at line 1187 of file qgsogrutils.cpp.