Quantum GIS API Documentation
1.7.4
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Class for storing a coordinate reference system (CRS) More...
#include <qgscoordinatereferencesystem.h>
Public Types | |
enum | CrsType { InternalCrsId, PostgisCrsId, EpsgCrsId } |
Public Member Functions | |
QgsCoordinateReferenceSystem () | |
Default constructor. | |
~QgsCoordinateReferenceSystem () | |
QgsCoordinateReferenceSystem (QString theDefinition) | |
QgsCoordinateReferenceSystem (const long theId, CrsType theType=PostgisCrsId) | |
QgsCoordinateReferenceSystem (const QgsCoordinateReferenceSystem &srs) | |
copy constructor | |
QgsCoordinateReferenceSystem & | operator= (const QgsCoordinateReferenceSystem &srs) |
Assignment operator. | |
bool | createFromId (const long theId, CrsType theType=PostgisCrsId) |
bool | createFromOgcWmsCrs (QString theCrs) |
Set up this CRS from the given OGC CRS. | |
bool | createFromSrid (const long theSrid) |
bool | createFromWkt (const QString theWkt) |
Q_DECL_DEPRECATED bool | createFromEpsg (const long theEpsg) |
bool | createFromSrsId (const long theSrsId) |
bool | createFromProj4 (const QString theProjString) |
bool | createFromString (const QString theDefinition) |
bool | isValid () const |
void | validate () |
long | findMatchingProj () |
bool | operator== (const QgsCoordinateReferenceSystem &theSrs) |
bool | operator!= (const QgsCoordinateReferenceSystem &theSrs) |
bool | equals (QString theProj4String) |
bool | readXML (QDomNode &theNode) |
bool | writeXML (QDomNode &theNode, QDomDocument &theDoc) const |
long | srsid () const |
long | postgisSrid () const |
Q_DECL_DEPRECATED long | epsg () const |
QString | authid () const |
QString | description () const |
QString | projectionAcronym () const |
QString | ellipsoidAcronym () const |
QString | toWkt () const |
QString | toProj4 () const |
Get the Proj Proj4 string representation of this srs. | |
bool | geographicFlag () const |
QGis::UnitType | mapUnits () const |
void | setValidationHint (QString html) |
QString | validationHint () |
Static Public Member Functions | |
static void | setCustomSrsValidation (CUSTOM_CRS_VALIDATION f) |
Sets custom function to force valid CRS QGIS uses implementation in QgisGui::customSrsValidation. | |
static CUSTOM_CRS_VALIDATION | customSrsValidation () |
Gets custom function. | |
Private Types | |
typedef QMap< QString, QString > | RecordMap |
Private Member Functions | |
void | setInternalId (long theSrsId) |
void | setSrid (long theSrid) |
void | setDescription (QString theDescription) |
void | setProj4String (QString theProj4String) |
void | setGeographicFlag (bool theGeoFlag) |
void | setEpsg (long theEpsg) |
void | setAuthId (QString theID) |
void | setProjectionAcronym (QString theProjectionAcronym) |
void | setEllipsoidAcronym (QString theEllipsoidAcronym) |
void | debugPrint () |
RecordMap | getRecord (QString theSql) |
void | setMapUnits () |
Work out the projection units and set the appropriate local variable. | |
bool | saveAsUserCRS () |
Save the proj4-string as a custom CRS. | |
long | getRecordCount () |
Helper for getting number of user CRS already in db. | |
QString | quotedValue (QString value) |
Helper for sql-safe value quoting. | |
bool | loadFromDb (QString db, QString expression, QString value) |
Static Private Member Functions | |
static QString | proj4FromSrsId (const int theSrsId) |
A static helper function to find out the proj4 string for a srsid. | |
static int | openDb (QString path, sqlite3 **db) |
Private Attributes | |
long | mSrsId |
The internal sqlite3 srs.db primary key for this srs. | |
QString | mDescription |
A textual description of the srs. | |
QString | mProjectionAcronym |
The official proj4 acronym for the projection family. | |
QString | mEllipsoidAcronym |
The official proj4 acronym for the ellipoid. | |
bool | mGeoFlag |
Whether this is a geographic or projected coordinate system. | |
QGis::UnitType | mMapUnits |
The map units. | |
long | mSRID |
If available, the Postgis spatial_ref_sys identifier for this srs (defaults to 0) | |
QString | mAuthId |
If available the authority identifier for this srs. | |
bool | mIsValidFlag |
Wehter this srs is properly defined and valid. | |
void * | mCRS |
QString | mValidationHint |
Static Private Attributes | |
static CUSTOM_CRS_VALIDATION | mCustomSrsValidation = NULL |
Class for storing a coordinate reference system (CRS)
Definition at line 43 of file qgscoordinatereferencesystem.h.
typedef QMap<QString, QString> QgsCoordinateReferenceSystem::RecordMap [private] |
A string based associative array used for passing records around
Definition at line 379 of file qgscoordinatereferencesystem.h.
Definition at line 47 of file qgscoordinatereferencesystem.h.
Default constructor.
Definition at line 45 of file qgscoordinatereferencesystem.cpp.
References mCRS.
Definition at line 72 of file qgscoordinatereferencesystem.cpp.
References mCRS.
QgsCoordinateReferenceSystem::QgsCoordinateReferenceSystem | ( | QString | theDefinition | ) | [explicit] |
Constructs a CRS object from a string definition as defined in the createFromString member function (by default a WKT definition).
theDefinition | A String containing a coordinate reference system definition. |
Definition at line 53 of file qgscoordinatereferencesystem.cpp.
References createFromString(), and mCRS.
QgsCoordinateReferenceSystem::QgsCoordinateReferenceSystem | ( | const long | theId, |
CrsType | theType = PostgisCrsId |
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) |
Use this constructor when you want to create a CRS object using a postgis SRID, an EpsgCrsId id or a QGIS CRS_ID.
theId | The ID no valid for the chosen coordinate system id type |
theType | One of the types described in QgsCoordinateReferenceSystem::CrsType |
Definition at line 63 of file qgscoordinatereferencesystem.cpp.
References createFromId(), and mCRS.
QString QgsCoordinateReferenceSystem::authid | ( | ) | const |
Get the authority identifier for this srs
Definition at line 687 of file qgscoordinatereferencesystem.cpp.
References mAuthId.
Referenced by createFromWkt(), QgsCoordinateTransform::initialise(), QgsRasterCalculator::processCalculation(), QgsRasterLayer::readXml(), and writeXML().
bool QgsCoordinateReferenceSystem::createFromEpsg | ( | const long | theEpsg | ) |
Set up this srs by fetching the appropriate information from the sqlite backend. First the system level read only srs.db will be checked and then the users ~/.qgis/qgis.db database will be checked for a match.
theEpsg | The EpsgCrsId for the desired spatial reference system. |
Definition at line 201 of file qgscoordinatereferencesystem.cpp.
References createFromOgcWmsCrs().
bool QgsCoordinateReferenceSystem::createFromId | ( | const long | theId, |
CrsType | theType = PostgisCrsId |
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) |
Definition at line 77 of file qgscoordinatereferencesystem.cpp.
References createFromOgcWmsCrs(), createFromSrid(), createFromSrsId(), EpsgCrsId, InternalCrsId, PostgisCrsId, and QgsDebugMsg.
Referenced by createFromString(), QgsCoordinateReferenceSystem(), QgsCoordinateTransform::QgsCoordinateTransform(), and readXML().
bool QgsCoordinateReferenceSystem::createFromOgcWmsCrs | ( | QString | theCrs | ) |
Set up this CRS from the given OGC CRS.
Sets this CRS to the given OGC WMS-format Coordinate Reference Systems.
false | if not given an valid label |
Definition at line 129 of file qgscoordinatereferencesystem.cpp.
References createFromSrsId(), GEOCRS_ID, loadFromDb(), and QgsApplication::srsDbFilePath().
Referenced by createFromEpsg(), createFromId(), createFromWkt(), QgsCoordinateTransform::initialise(), QgsProjectionSelector::QgsProjectionSelector(), readXML(), QgsVectorLayer::setCoordinateSystem(), QgsRasterLayer::setDataProvider(), QgsDistanceArea::setSourceAuthId(), QgsDistanceArea::setSourceEpsgCrsId(), and validate().
bool QgsCoordinateReferenceSystem::createFromProj4 | ( | const QString | theProjString | ) |
Set up this srs by passing it a proj4 style formatted string. The string will be parsed and the projection and ellipsoid members set and the remainder of the proj4 string will be stored in the parameters member. The reason for this is so that we can easily present the user with 'natural language' representation of the projection and ellipsoid by looking them up in the srs.bs sqlite database. Also having the ellpse and proj elements stripped out is hepful to speed up globbing queries (see below).
We try to match the proj string to and srsid using the following logic:
theProjString | A proj4 format string |
Definition at line 356 of file qgscoordinatereferencesystem.cpp.
References createFromSrsId(), findMatchingProj(), getRecord(), LAT_PREFIX_LEN, mEllipsoidAcronym, mIsValidFlag, mProjectionAcronym, QgsDebugMsg, quotedValue(), saveAsUserCRS(), setProj4String(), and toProj4().
Referenced by createFromString(), createFromWkt(), QgsProjectionSelector::QgsProjectionSelector(), readXML(), and QgsDistanceArea::setEllipsoid().
bool QgsCoordinateReferenceSystem::createFromSrid | ( | const long | theSrid | ) |
Set up this srs by fetching the appropriate information from the sqlite backend. First the system level read only srs.db will be checked and then the users ~/.qgis/qgis.db database will be checked for a match.
theSrid | The postgis SRID for the desired spatial reference system. |
Definition at line 196 of file qgscoordinatereferencesystem.cpp.
References loadFromDb(), and QgsApplication::srsDbFilePath().
Referenced by createFromId().
bool QgsCoordinateReferenceSystem::createFromSrsId | ( | const long | theSrsId | ) |
Set up this srs by fetching the appropriate information from the sqlite backend. If the srsid is < 100000, only the system srs.db will be checked. If the srsid > 100000 the srs will be retrieved from the ~/.qgis/qgis.db
theSrsId | The QGIS SrsId for the desired spatial reference system. |
Definition at line 206 of file qgscoordinatereferencesystem.cpp.
References loadFromDb(), QgsApplication::qgisUserDbFilePath(), QgsApplication::srsDbFilePath(), and USER_CRS_START_ID.
Referenced by createFromId(), createFromOgcWmsCrs(), createFromProj4(), QgsCoordinateTransform::setDestCRSID(), and QgsDistanceArea::setSourceCrs().
bool QgsCoordinateReferenceSystem::createFromString | ( | const QString | theDefinition | ) |
Set up this srs from a string definition, by default a WKT definition. Otherwise the string defines a authority, followed by a colon, followed by the definition. The authority can be one of "epsg", "postgis", "internal" for integer definitions, and "wkt" or "proj4" for string definitions. The implementation of each authority uses the corresponding createFrom... function.
theDefinition | A String containing a coordinate reference system definition. |
Definition at line 98 of file qgscoordinatereferencesystem.cpp.
References createFromId(), createFromProj4(), createFromWkt(), EpsgCrsId, InternalCrsId, and PostgisCrsId.
Referenced by QgsCoordinateReferenceSystem().
bool QgsCoordinateReferenceSystem::createFromWkt | ( | const QString | theWkt | ) |
Set up this srs using a Wkt spatial ref sys definition. The wkt will be converted to a proj4 string using OGR helper functions. After this the srs databasses will be searched for matches. First the system level read only srs.db will be checked and then the users ~/.qgis/qgis.db database will be checked for a match.
theWkt | The Wkt for the desired spatial reference system. |
Definition at line 288 of file qgscoordinatereferencesystem.cpp.
References authid(), createFromOgcWmsCrs(), createFromProj4(), mCRS, mIsValidFlag, and QgsDebugMsg.
Referenced by createFromString(), and QgsCoordinateTransform::QgsCoordinateTransform().
Gets custom function.
Definition at line 1261 of file qgscoordinatereferencesystem.cpp.
References mCustomSrsValidation.
Referenced by QgsMapLayer::readXML().
void QgsCoordinateReferenceSystem::debugPrint | ( | ) | [private] |
Print the description if debugging
Definition at line 1266 of file qgscoordinatereferencesystem.cpp.
References QGis::Degrees, QGis::Feet, mapUnits(), mDescription, QGis::Meters, mIsValidFlag, mSrsId, QgsDebugMsg, toProj4(), and toWkt().
Referenced by setProj4String().
QString QgsCoordinateReferenceSystem::description | ( | ) | const |
Get the Description
Definition at line 692 of file qgscoordinatereferencesystem.cpp.
References mDescription.
Referenced by operator<<(), and writeXML().
QString QgsCoordinateReferenceSystem::ellipsoidAcronym | ( | ) | const |
Get the Ellipsoid Acronym
Definition at line 716 of file qgscoordinatereferencesystem.cpp.
References mEllipsoidAcronym.
Referenced by operator<<(), saveAsUserCRS(), and writeXML().
long QgsCoordinateReferenceSystem::epsg | ( | ) | const |
Get the EpsgCrsId identifier for this srs
Definition at line 679 of file qgscoordinatereferencesystem.cpp.
References mAuthId.
bool QgsCoordinateReferenceSystem::equals | ( | QString | theProj4String | ) |
Overloaded == operator used to compare to CRS's. Internally it will use OGR isSameCRS() or isSameGeoCRS() methods as appropriate. Additionally logic may also be applied if the result from the OGR methods is inconclusive.
Definition at line 1007 of file qgscoordinatereferencesystem.cpp.
References setProj4String().
Referenced by findMatchingProj().
This is a globbing function to try to find a record in the database that matches a CRS defined only by a proj4string. The goal is to learn what the tbl_srs.srs_id value is for the CRS. Internally the source CRS is converted to an OGR srs object using the proj4string call and then every record in the database that matches projection and ellipsoid will be converted to an OGR srs in turn and compared to the source CRS. There are some gotchas with using ogr isSame() srs comparison, but its more effective than using straight string comparison of proj4params.
Definition at line 872 of file qgscoordinatereferencesystem.cpp.
References equals(), mEllipsoidAcronym, mIsValidFlag, mProjectionAcronym, openDb(), QgsApplication::qgisUserDbFilePath(), QgsDebugMsg, quotedValue(), and QgsApplication::srsDbFilePath().
Referenced by createFromProj4().
bool QgsCoordinateReferenceSystem::geographicFlag | ( | ) | const |
Get this Geographic? flag
Definition at line 743 of file qgscoordinatereferencesystem.cpp.
References mGeoFlag.
Referenced by writeXML().
QgsCoordinateReferenceSystem::RecordMap QgsCoordinateReferenceSystem::getRecord | ( | QString | theSql | ) | [private] |
Get a record from the srs.db or qgis.db backends, given an sql statment.
theSql | The sql query to execute |
Definition at line 566 of file qgscoordinatereferencesystem.cpp.
References openDb(), QgsApplication::qgisUserDbFilePath(), QgsDebugMsg, QgsDebugMsgLevel, and QgsApplication::srsDbFilePath().
Referenced by createFromProj4().
long QgsCoordinateReferenceSystem::getRecordCount | ( | ) | [private] |
Helper for getting number of user CRS already in db.
Definition at line 1357 of file qgscoordinatereferencesystem.cpp.
References QgsApplication::qgisUserDbFilePath(), and QgsDebugMsg.
Referenced by saveAsUserCRS().
bool QgsCoordinateReferenceSystem::isValid | ( | ) | const |
Find out whether this CRS is correctly initialised and usable
Definition at line 351 of file qgscoordinatereferencesystem.cpp.
References mIsValidFlag.
Referenced by QgsCoordinateTransform::initialise(), QgsProjectionSelector::QgsProjectionSelector(), QgsRasterDataProvider::readBlock(), QgsVectorLayer::setCoordinateSystem(), QgsRasterLayer::setDataProvider(), QgsCoordinateTransform::transformCoords(), and QgsVectorFileWriter::writeAsVectorFormat().
bool QgsCoordinateReferenceSystem::loadFromDb | ( | QString | db, |
QString | expression, | ||
QString | value | ||
) | [private] |
Definition at line 212 of file qgscoordinatereferencesystem.cpp.
References mAuthId, mCRS, mDescription, mEllipsoidAcronym, mGeoFlag, mIsValidFlag, mProjectionAcronym, mSRID, mSrsId, openDb(), QgsDebugMsg, QgsDebugMsgLevel, quotedValue(), setMapUnits(), setProj4String(), toProj4(), and USER_CRS_START_ID.
Referenced by createFromOgcWmsCrs(), createFromSrid(), and createFromSrsId().
Get the units that the projection is in
Definition at line 748 of file qgscoordinatereferencesystem.cpp.
References mMapUnits.
Referenced by QgsVectorLayer::addTopologicalPoints(), and debugPrint().
int QgsCoordinateReferenceSystem::openDb | ( | QString | path, |
sqlite3 ** | db | ||
) | [static, private] |
Definition at line 1234 of file qgscoordinatereferencesystem.cpp.
References QgsMessageOutput::createMessageOutput(), QgsMessageOutput::MessageText, QgsDebugMsg, QgsDebugMsgLevel, QgsMessageOutput::setMessage(), QgsMessageOutput::setTitle(), and QgsMessageOutput::showMessage().
Referenced by findMatchingProj(), getRecord(), loadFromDb(), and proj4FromSrsId().
bool QgsCoordinateReferenceSystem::operator!= | ( | const QgsCoordinateReferenceSystem & | theSrs | ) |
Overloaded != operator used to compare to CRS's. Returns opposite bool value to operator ==
Definition at line 1002 of file qgscoordinatereferencesystem.cpp.
QgsCoordinateReferenceSystem & QgsCoordinateReferenceSystem::operator= | ( | const QgsCoordinateReferenceSystem & | srs | ) |
Assignment operator.
Definition at line 156 of file qgscoordinatereferencesystem.cpp.
References mAuthId, mCRS, mDescription, mEllipsoidAcronym, mGeoFlag, mIsValidFlag, mMapUnits, mProjectionAcronym, mSRID, mSrsId, and mValidationHint.
bool QgsCoordinateReferenceSystem::operator== | ( | const QgsCoordinateReferenceSystem & | theSrs | ) |
Overloaded == operator used to compare to CRS's. Internally it will delegate to the equals method described below
Definition at line 971 of file qgscoordinatereferencesystem.cpp.
References mCRS, mIsValidFlag, and QgsDebugMsgLevel.
long QgsCoordinateReferenceSystem::postgisSrid | ( | ) | const |
Get the postgis srid for this srs
Definition at line 672 of file qgscoordinatereferencesystem.cpp.
References mSRID.
Referenced by writeXML().
QString QgsCoordinateReferenceSystem::proj4FromSrsId | ( | const int | theSrsId | ) | [static, private] |
A static helper function to find out the proj4 string for a srsid.
theSrsId | The srsid used for the lookup |
Definition at line 1171 of file qgscoordinatereferencesystem.cpp.
References openDb(), QgsApplication::qgisUserDbFilePath(), QgsDebugMsg, QgsApplication::srsDbFilePath(), and USER_CRS_START_ID.
QString QgsCoordinateReferenceSystem::projectionAcronym | ( | ) | const |
Get the Projection Acronym
Definition at line 704 of file qgscoordinatereferencesystem.cpp.
References mProjectionAcronym.
Referenced by operator<<(), saveAsUserCRS(), and writeXML().
QString QgsCoordinateReferenceSystem::quotedValue | ( | QString | value | ) | [private] |
Helper for sql-safe value quoting.
Definition at line 1389 of file qgscoordinatereferencesystem.cpp.
Referenced by createFromProj4(), findMatchingProj(), loadFromDb(), and saveAsUserCRS().
bool QgsCoordinateReferenceSystem::readXML | ( | QDomNode & | theNode | ) |
Restores state from the given Dom node.
theNode | The node from which state will be restored |
Definition at line 1027 of file qgscoordinatereferencesystem.cpp.
References createFromId(), createFromOgcWmsCrs(), createFromProj4(), GEOCRS_ID, InternalCrsId, mIsValidFlag, QgsDebugMsg, setAuthId(), setDescription(), setEllipsoidAcronym(), setGeographicFlag(), setInternalId(), setMapUnits(), setProj4String(), setProjectionAcronym(), and setSrid().
Referenced by QgsMapLayer::readXML(), QgsCoordinateTransform::readXML(), and QgsMapRenderer::readXML().
bool QgsCoordinateReferenceSystem::saveAsUserCRS | ( | ) | [private] |
Save the proj4-string as a custom CRS.
Copied from QgsCustomProjectionDialog /// Please refactor into SQL handler !!! ///.
Definition at line 1301 of file qgscoordinatereferencesystem.cpp.
References ellipsoidAcronym(), getRecordCount(), mIsValidFlag, projectionAcronym(), QgsApplication::qgisUserDbFilePath(), QgsDebugMsg, quotedValue(), toProj4(), and USER_CRS_START_ID.
Referenced by createFromProj4().
void QgsCoordinateReferenceSystem::setAuthId | ( | QString | theID | ) | [private] |
Set the authority identifier for this srs
theID | the authority identifier for this srs (defaults to 0) |
Definition at line 761 of file qgscoordinatereferencesystem.cpp.
References mAuthId.
Referenced by readXML().
void QgsCoordinateReferenceSystem::setCustomSrsValidation | ( | CUSTOM_CRS_VALIDATION | f | ) | [static] |
Sets custom function to force valid CRS QGIS uses implementation in QgisGui::customSrsValidation.
Definition at line 1256 of file qgscoordinatereferencesystem.cpp.
References mCustomSrsValidation.
Referenced by QgsMapLayer::readXML().
void QgsCoordinateReferenceSystem::setDescription | ( | QString | theDescription | ) | [private] |
Set the Description
theDescription | A textual description of the srs. |
Definition at line 769 of file qgscoordinatereferencesystem.cpp.
References mDescription.
Referenced by readXML().
void QgsCoordinateReferenceSystem::setEllipsoidAcronym | ( | QString | theEllipsoidAcronym | ) | [private] |
Set the ellipsoid acronym
theEllipsoidAcronym | the acronym (must be a valid proj4 ellipsoid acronym) |
Definition at line 801 of file qgscoordinatereferencesystem.cpp.
References mEllipsoidAcronym.
Referenced by readXML().
void QgsCoordinateReferenceSystem::setEpsg | ( | long | theEpsg | ) | [private] |
Set the EpsgCrsId identifier for this srs
theEpsg | the ESPG identifier for this srs (defaults to 0) |
Definition at line 793 of file qgscoordinatereferencesystem.cpp.
References mAuthId.
void QgsCoordinateReferenceSystem::setGeographicFlag | ( | bool | theGeoFlag | ) | [private] |
Set this Geographic? flag
theGeoFlag | Whether this is a geographic or projected coordinate system |
Definition at line 789 of file qgscoordinatereferencesystem.cpp.
References mGeoFlag.
Referenced by readXML().
void QgsCoordinateReferenceSystem::setInternalId | ( | long | theSrsId | ) | [private] |
Set the QGIS SrsId
theSrsId | The internal sqlite3 srs.db primary key for this srs |
Definition at line 757 of file qgscoordinatereferencesystem.cpp.
References mSrsId.
Referenced by readXML().
void QgsCoordinateReferenceSystem::setMapUnits | ( | ) | [private] |
Work out the projection units and set the appropriate local variable.
Definition at line 806 of file qgscoordinatereferencesystem.cpp.
References QGis::Degrees, doubleNear(), QGis::Feet, mCRS, QGis::Meters, mIsValidFlag, mMapUnits, QgsDebugMsg, QgsDebugMsgLevel, and QGis::UnknownUnit.
Referenced by loadFromDb(), readXML(), and setProj4String().
void QgsCoordinateReferenceSystem::setProj4String | ( | QString | theProj4String | ) | [private] |
Definition at line 773 of file qgscoordinatereferencesystem.cpp.
References debugPrint(), mCRS, mIsValidFlag, and setMapUnits().
Referenced by createFromProj4(), equals(), loadFromDb(), and readXML().
void QgsCoordinateReferenceSystem::setProjectionAcronym | ( | QString | theProjectionAcronym | ) | [private] |
Set the projection acronym
theProjectionAcronym | the acronym (must be a valid proj4 projection acronym) |
Definition at line 797 of file qgscoordinatereferencesystem.cpp.
References mProjectionAcronym.
Referenced by readXML().
void QgsCoordinateReferenceSystem::setSrid | ( | long | theSrid | ) | [private] |
Set the postgis srid
theSrid | The postgis spatial_ref_sys key for this srs |
Definition at line 765 of file qgscoordinatereferencesystem.cpp.
References mSRID.
Referenced by readXML().
void QgsCoordinateReferenceSystem::setValidationHint | ( | QString | html | ) |
Set user hint for validation
Definition at line 1288 of file qgscoordinatereferencesystem.cpp.
References mValidationHint.
Referenced by QgsMapLayer::readXML(), QgsVectorLayer::setCoordinateSystem(), and QgsRasterLayer::setDataProvider().
long QgsCoordinateReferenceSystem::srsid | ( | ) | const |
Get the SrsId - if possible
Definition at line 667 of file qgscoordinatereferencesystem.cpp.
References mSrsId.
Referenced by QgsMapRenderer::destinationCrs(), QgsProjectionSelector::QgsProjectionSelector(), QgsMapRenderer::setDestinationCrs(), and writeXML().
QString QgsCoordinateReferenceSystem::toProj4 | ( | ) | const |
Get the Proj Proj4 string representation of this srs.
If proj and ellps keys are found in the parameters, they will be stripped out and the Projection and ellipsoid acronyms will be overridden with these.
Definition at line 728 of file qgscoordinatereferencesystem.cpp.
References mCRS, and mIsValidFlag.
Referenced by createFromProj4(), debugPrint(), QgsMapRenderer::destinationCrs(), QgsCoordinateTransform::initialise(), loadFromDb(), QgsRasterLayer::metadata(), operator<<(), saveAsUserCRS(), QgsMapRenderer::setDestinationCrs(), QgsCoordinateTransform::transformCoords(), writeXML(), and QgsProjectionSelector::~QgsProjectionSelector().
QString QgsCoordinateReferenceSystem::toWkt | ( | ) | const |
A helper to get an wkt representation of this srs
Definition at line 1014 of file qgscoordinatereferencesystem.cpp.
References mCRS.
Referenced by debugPrint(), QgsRasterCalculator::processCalculation(), QgsRasterLayer::projectionWkt(), QgsVectorFileWriter::QgsVectorFileWriter(), and QgsRasterLayer::setDataProvider().
Perform some validation on this CRS. If the sts doesn't validate the default behaviour settings for layers with unknown CRS will be consulted and acted on accordingly. By hell or high water this method will do its best to make sure that this CRS is valid - even if that involves resorting to a hard coded default of geocs:wgs84.
Definition at line 182 of file qgscoordinatereferencesystem.cpp.
References createFromOgcWmsCrs(), GEO_EPSG_CRS_AUTHID, mCustomSrsValidation, and mIsValidFlag.
Referenced by QgsMapLayer::readXML(), QgsVectorLayer::setCoordinateSystem(), and QgsRasterLayer::setDataProvider().
QString QgsCoordinateReferenceSystem::validationHint | ( | ) |
Get user hint for validation
Definition at line 1293 of file qgscoordinatereferencesystem.cpp.
References mValidationHint.
bool QgsCoordinateReferenceSystem::writeXML | ( | QDomNode & | theNode, |
QDomDocument & | theDoc | ||
) | const |
Stores state to the given Dom node in the given document. Below is an example of the generated tag.
<spatialrefsys> <proj4>+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs </proj4> <srsid>2585</srsid> <srid>4326</srid> <epsg>4326</epsg> <description>WGS 84</description> <projectionacronym>longlat</projectionacronym> <ellipsoidacronym>WGS84</ellipsoidacronym> </spatialrefsys>
theNode | The node in which state will be restored |
theDoc | The document in which state will be stored |
Definition at line 1113 of file qgscoordinatereferencesystem.cpp.
References authid(), description(), ellipsoidAcronym(), geographicFlag(), postgisSrid(), projectionAcronym(), srsid(), and toProj4().
Referenced by QgsMapLayer::writeXML(), QgsMapRenderer::writeXML(), and QgsCoordinateTransform::writeXML().
QString QgsCoordinateReferenceSystem::mAuthId [private] |
If available the authority identifier for this srs.
Definition at line 407 of file qgscoordinatereferencesystem.h.
Referenced by authid(), epsg(), loadFromDb(), operator=(), setAuthId(), and setEpsg().
void* QgsCoordinateReferenceSystem::mCRS [private] |
Definition at line 423 of file qgscoordinatereferencesystem.h.
Referenced by createFromWkt(), loadFromDb(), operator=(), operator==(), QgsCoordinateReferenceSystem(), setMapUnits(), setProj4String(), toProj4(), toWkt(), and ~QgsCoordinateReferenceSystem().
CUSTOM_CRS_VALIDATION QgsCoordinateReferenceSystem::mCustomSrsValidation = NULL [static, private] |
Definition at line 429 of file qgscoordinatereferencesystem.h.
Referenced by customSrsValidation(), setCustomSrsValidation(), and validate().
QString QgsCoordinateReferenceSystem::mDescription [private] |
A textual description of the srs.
Definition at line 395 of file qgscoordinatereferencesystem.h.
Referenced by debugPrint(), description(), loadFromDb(), operator=(), and setDescription().
QString QgsCoordinateReferenceSystem::mEllipsoidAcronym [private] |
The official proj4 acronym for the ellipoid.
Definition at line 399 of file qgscoordinatereferencesystem.h.
Referenced by createFromProj4(), ellipsoidAcronym(), findMatchingProj(), loadFromDb(), operator=(), and setEllipsoidAcronym().
bool QgsCoordinateReferenceSystem::mGeoFlag [private] |
Whether this is a geographic or projected coordinate system.
Definition at line 401 of file qgscoordinatereferencesystem.h.
Referenced by geographicFlag(), loadFromDb(), operator=(), and setGeographicFlag().
bool QgsCoordinateReferenceSystem::mIsValidFlag [private] |
Wehter this srs is properly defined and valid.
Definition at line 409 of file qgscoordinatereferencesystem.h.
Referenced by createFromProj4(), createFromWkt(), debugPrint(), findMatchingProj(), isValid(), loadFromDb(), operator=(), operator==(), readXML(), saveAsUserCRS(), setMapUnits(), setProj4String(), toProj4(), and validate().
The map units.
Definition at line 403 of file qgscoordinatereferencesystem.h.
Referenced by mapUnits(), operator=(), and setMapUnits().
QString QgsCoordinateReferenceSystem::mProjectionAcronym [private] |
The official proj4 acronym for the projection family.
Definition at line 397 of file qgscoordinatereferencesystem.h.
Referenced by createFromProj4(), findMatchingProj(), loadFromDb(), operator=(), projectionAcronym(), and setProjectionAcronym().
long QgsCoordinateReferenceSystem::mSRID [private] |
If available, the Postgis spatial_ref_sys identifier for this srs (defaults to 0)
Definition at line 405 of file qgscoordinatereferencesystem.h.
Referenced by loadFromDb(), operator=(), postgisSrid(), and setSrid().
long QgsCoordinateReferenceSystem::mSrsId [private] |
The internal sqlite3 srs.db primary key for this srs.
Definition at line 393 of file qgscoordinatereferencesystem.h.
Referenced by debugPrint(), loadFromDb(), operator=(), setInternalId(), and srsid().
QString QgsCoordinateReferenceSystem::mValidationHint [private] |
Definition at line 427 of file qgscoordinatereferencesystem.h.
Referenced by operator=(), setValidationHint(), and validationHint().