QgsNominatimGeocoder Class Reference

A geocoder which uses the Nominatim geocoding API to retrieve results. More...

#include <qgsnominatimgeocoder.h>

Inheritance diagram for QgsNominatimGeocoder:

Public Member Functions
	QgsNominatimGeocoder (const QString &countryCodes=QString(), const QString &endpoint=QString())
	Constructor for QgsNominatimGeocoder. More...
QgsFields	appendedFields () const override
	Returns a set of newly created fields which will be appended to existing features during the geocode operation. More...
QString	countryCodes () const
	Returns the optional region bias which will be used to prioritize results in a certain region. More...
QString	endpoint () const
	Returns the API endpoint used for requests. More...
Flags	flags () const override
	Returns the geocoder's capability flags. More...
QList< QgsGeocoderResult >	geocodeString (const QString &string, const QgsGeocoderContext &context, QgsFeedback *feedback=nullptr) const override
	Geocodes a string. More...
QgsGeocoderResult	jsonToResult (const QVariantMap &json) const
	Converts a JSON result returned from the Nominatim service to a geocoder result object. More...
double	requestsPerSecond () const
	Returns the number of requests per seconds to the endpoint. More...
QUrl	requestUrl (const QString &address, const QgsRectangle &bounds=QgsRectangle()) const
	Returns the URL generated for geocoding the specified address. More...
void	setCountryCodes (const QString &countryCodes)
	Sets the optional region bias which will be used to prioritize results in a certain region. More...
void	setEndpoint (const QString &endpoint)
	Sets a specific API endpoint to use for requests. More...
void	setRequestsPerSecond (double number)
	Sets the number of request per seconds to the endpoint. More...
QgsWkbTypes::Type	wkbType () const override
	Returns the WKB type of geometries returned by the geocoder. More...
Public Member Functions inherited from QgsGeocoderInterface
virtual	~QgsGeocoderInterface ()=default
virtual QgsFields	appendedFields () const
	Returns a set of newly created fields which will be appended to existing features during the geocode operation. More...
virtual Flags	flags () const =0
	Returns the geocoder's capability flags. More...
virtual QList< QgsGeocoderResult >	geocodeFeature (const QgsFeature &feature, const QgsGeocoderContext &context, QgsFeedback *feedback=nullptr) const
	Geocodes a feature. More...
virtual QList< QgsGeocoderResult >	geocodeString (const QString &string, const QgsGeocoderContext &context, QgsFeedback *feedback=nullptr) const
	Geocodes a string. More...
virtual QgsWkbTypes::Type	wkbType () const
	Returns the WKB type of geometries returned by the geocoder. More...

Additional Inherited Members
Public Types inherited from QgsGeocoderInterface
enum class	Flag { GeocodesStrings = 1 << 0 , GeocodesFeatures = 1 << 1 }
	Capability flags for the geocoder. More...

Detailed Description

A geocoder which uses the Nominatim geocoding API to retrieve results.

This geocoder utilizes the Nominatim geocoding API in order to geocode strings.

Warning

The user is responsible for respecting the usage policy when using the default OpenStreetMap-run server.

Since

QGIS 3.18

Definition at line 36 of file qgsnominatimgeocoder.h.

Constructor & Destructor Documentation

QgsNominatimGeocoder()

QgsNominatimGeocoder::QgsNominatimGeocoder	(	const QString &	countryCodes = QString(),
		const QString &	endpoint = QString()
	)

Constructor for QgsNominatimGeocoder.

Optionally, countryCodes can be specified to restrict results to one or more countries. The codes must be in ISO 3166-1alpha2 code and comma-separated.

The optional endpoint argument can be used to specify a non-default endpoint to use for request.

Definition at line 35 of file qgsnominatimgeocoder.cpp.

Member Function Documentation

appendedFields()

QgsFields QgsNominatimGeocoder::appendedFields ( ) const

overridevirtual

Returns a set of newly created fields which will be appended to existing features during the geocode operation.

These fields will include any extra content returned by the geocoder, such as fields for accuracy of the match or correct attribute values.

Reimplemented from QgsGeocoderInterface.

Definition at line 49 of file qgsnominatimgeocoder.cpp.

countryCodes()

QString QgsNominatimGeocoder::countryCodes

(

)

const

Returns the optional region bias which will be used to prioritize results in a certain region.

See also

setCountryCodes()

Definition at line 242 of file qgsnominatimgeocoder.cpp.

endpoint()

QString QgsNominatimGeocoder::endpoint

(

)

const

Returns the API endpoint used for requests.

See also

setEndpoint()

Definition at line 232 of file qgsnominatimgeocoder.cpp.

flags()

QgsGeocoderInterface::Flags QgsNominatimGeocoder::flags ( ) const

overridevirtual

Returns the geocoder's capability flags.

Implements QgsGeocoderInterface.

Definition at line 44 of file qgsnominatimgeocoder.cpp.

geocodeString()

QList< QgsGeocoderResult > QgsNominatimGeocoder::geocodeString ( const QString &  string, const QgsGeocoderContext &  context, QgsFeedback *  feedback = nullptr  ) const

overridevirtual

Geocodes a string.

If implemented by the geocoder (i.e. flags() returns the QgsGeocoderInterface::Flag::GeocodesStrings flag), a list of matching results will be returned.

The optional feedback argument can be used to provider cancellation support.

Reimplemented from QgsGeocoderInterface.

Definition at line 73 of file qgsnominatimgeocoder.cpp.

jsonToResult()

QgsGeocoderResult QgsNominatimGeocoder::jsonToResult

(

const QVariantMap &

json

)

const

Converts a JSON result returned from the Nominatim service to a geocoder result object.

Definition at line 170 of file qgsnominatimgeocoder.cpp.

requestsPerSecond()

double QgsNominatimGeocoder::requestsPerSecond ( ) const

inline

Returns the number of requests per seconds to the endpoint.

See also

setRequestsPerSecond()

Definition at line 85 of file qgsnominatimgeocoder.h.

requestUrl()

QUrl QgsNominatimGeocoder::requestUrl	(	const QString &	address,
		const QgsRectangle &	bounds = QgsRectangle()
	)		const

Returns the URL generated for geocoding the specified address.

Definition at line 147 of file qgsnominatimgeocoder.cpp.

setCountryCodes()

void QgsNominatimGeocoder::setCountryCodes

(

const QString &

countryCodes

)

Sets the optional region bias which will be used to prioritize results in a certain region.

The region argument must be set to a two letter country code top-level domain value, e.g. "gb" for Great Britain.

See also

countryCodes()

Definition at line 247 of file qgsnominatimgeocoder.cpp.

setEndpoint()

void QgsNominatimGeocoder::setEndpoint

(

const QString &

endpoint

)

Sets a specific API endpoint to use for requests.

This is for internal testing purposes only.

See also

endpoint()

Definition at line 237 of file qgsnominatimgeocoder.cpp.

setRequestsPerSecond()

void QgsNominatimGeocoder::setRequestsPerSecond ( double  number )

inline

Sets the number of request per seconds to the endpoint.

See also

requestsPerSecond()

Warning

Setting this to a value > 1 violates the nomatim terms of service. Only change this value if you are using a self-hosted nomatim service.

Definition at line 93 of file qgsnominatimgeocoder.h.

wkbType()

QgsWkbTypes::Type QgsNominatimGeocoder::wkbType ( ) const

overridevirtual

Returns the WKB type of geometries returned by the geocoder.

If this is not known in advance then QgsWkbTypes::Unknown should be returned (e.g. in the case that a geocoder may return different geometry types depending on the quality of the match).

Reimplemented from QgsGeocoderInterface.

Definition at line 68 of file qgsnominatimgeocoder.cpp.

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

• /build/qgis-3.28.0+99sid/src/core/geocoding/qgsnominatimgeocoder.h
• /build/qgis-3.28.0+99sid/src/core/geocoding/qgsnominatimgeocoder.cpp