mirror of
https://github.com/qgis/QGIS.git
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When saving a user crs, if a WKT representation of the CRS is available,
then store and save that Proj string representations of CRSes are lossy, so we should always prefer WKT when it's available
This commit is contained in:
Nyall Dawson
parent
4e4cd313bd
commit
187b8f3325
@ -696,10 +696,9 @@ Update proj.4 parameters in our database from proj.4
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This is used internally and should not be necessary to call in client code
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%End
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long saveAsUserCrs( const QString &name );
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%Docstring
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Save the proj4-string as a custom CRS.
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Saves the CRS as a custom ("USER") CRS.
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Returns the new CRS srsid(), or -1 if the CRS could not be saved.
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%End
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@ -624,7 +624,7 @@ bool QgsCoordinateReferenceSystem::loadFromDatabase( const QString &db, const QS
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*/
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QString mySql = "select srs_id,description,projection_acronym,"
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"ellipsoid_acronym,parameters,srid,auth_name||':'||auth_id,is_geo "
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"ellipsoid_acronym,parameters,srid,auth_name||':'||auth_id,is_geo,wkt "
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"from tbl_srs where " + expression + '=' + QgsSqliteUtils::quotedString( value ) + " order by deprecated";
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statement = database.prepare( mySql, myResult );
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// XXX Need to free memory from the error msg if one is set
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@ -638,6 +638,7 @@ bool QgsCoordinateReferenceSystem::loadFromDatabase( const QString &db, const QS
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d->mSRID = statement.columnAsText( 5 ).toLong();
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d->mAuthId = statement.columnAsText( 6 );
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d->mIsGeographic = statement.columnAsText( 7 ).toInt() != 0;
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d->mWkt = statement.columnAsText( 8 );
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d->mAxisInvertedDirty = true;
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if ( d->mSrsId >= USER_CRS_START_ID && d->mAuthId.isEmpty() )
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@ -667,7 +668,10 @@ bool QgsCoordinateReferenceSystem::loadFromDatabase( const QString &db, const QS
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if ( !d->mIsValid )
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{
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setProj4String( d->mProj4 );
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if ( !d->mWkt.isEmpty() )
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setWktString( d->mWkt );
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else
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setProj4String( d->mProj4 );
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}
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}
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else
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@ -734,135 +738,27 @@ bool QgsCoordinateReferenceSystem::createFromWkt( const QString &wkt )
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return d->mIsValid;
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}
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bool res = false;
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#if PROJ_VERSION_MAJOR>=6
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PROJ_STRING_LIST warnings = nullptr;
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PROJ_STRING_LIST grammerErrors = nullptr;
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// try to match against user crs
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QgsCoordinateReferenceSystem::RecordMap record = getRecord( "select * from tbl_srs where parameters=" + QgsSqliteUtils::quotedString( wkt ) + " order by deprecated" );
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if ( !record.empty() )
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{
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QgsProjUtils::proj_pj_unique_ptr crs( proj_create_from_wkt( QgsProjContext::get(), wkt.toLatin1().constData(), nullptr, &warnings, &grammerErrors ) );
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d->mPj = QgsProjUtils::crsToSingleCrs( crs.get() );
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}
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res = static_cast< bool >( d->mPj );
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if ( !res )
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{
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QgsDebugMsg( QStringLiteral( "\n---------------------------------------------------------------" ) );
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QgsDebugMsg( QStringLiteral( "This CRS could *** NOT *** be set from the supplied Wkt " ) );
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QgsDebugMsg( "INPUT: " + wkt );
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for ( auto iter = warnings; iter && *iter; ++iter )
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QgsDebugMsg( *iter );
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for ( auto iter = grammerErrors; iter && *iter; ++iter )
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QgsDebugMsg( *iter );
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QgsDebugMsg( QStringLiteral( "---------------------------------------------------------------\n" ) );
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}
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proj_string_list_destroy( warnings );
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proj_string_list_destroy( grammerErrors );
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#else
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QByteArray ba = wkt.toLatin1();
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const char *pWkt = ba.data();
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OGRErr myInputResult = OSRImportFromWkt( d->mCRS, const_cast< char ** >( & pWkt ) );
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res = myInputResult == OGRERR_NONE;
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if ( !res )
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{
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QgsDebugMsg( QStringLiteral( "\n---------------------------------------------------------------" ) );
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QgsDebugMsg( QStringLiteral( "This CRS could *** NOT *** be set from the supplied Wkt " ) );
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QgsDebugMsg( "INPUT: " + wkt );
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QgsDebugMsg( QStringLiteral( "UNUSED WKT: %1" ).arg( pWkt ) );
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QgsDebugMsg( QStringLiteral( "---------------------------------------------------------------\n" ) );
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}
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#endif
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if ( !res )
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{
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locker.changeMode( QgsReadWriteLocker::Write );
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if ( !sDisableWktCache )
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sWktCache()->insert( wkt, *this );
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return d->mIsValid;
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}
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#if PROJ_VERSION_MAJOR>=6
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if ( d->mPj )
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{
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// try 1 - maybe we can directly grab the auth name and code from the crs already?
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QString authName( proj_get_id_auth_name( d->mPj.get(), 0 ) );
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QString authCode( proj_get_id_code( d->mPj.get(), 0 ) );
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if ( authName.isEmpty() || authCode.isEmpty() )
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long srsId = record[QStringLiteral( "srs_id" )].toLong();
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if ( srsId > 0 )
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{
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// try 2, use proj's identify method and see if there's a nice candidate we can use
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QgsProjUtils::identifyCrs( d->mPj.get(), authName, authCode );
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}
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if ( !authName.isEmpty() && !authCode.isEmpty() )
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{
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if ( loadFromAuthCode( authName, authCode ) )
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{
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locker.changeMode( QgsReadWriteLocker::Write );
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if ( !sDisableWktCache )
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sWktCache()->insert( wkt, *this );
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return true;
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}
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}
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else
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{
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// Still a valid CRS, just not a known one
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d->mIsValid = true;
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createFromSrsId( srsId );
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}
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}
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#else
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if ( OSRAutoIdentifyEPSG( d->mCRS ) == OGRERR_NONE )
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else
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{
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QString authid = QStringLiteral( "%1:%2" )
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.arg( OSRGetAuthorityName( d->mCRS, nullptr ),
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OSRGetAuthorityCode( d->mCRS, nullptr ) );
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bool result = createFromOgcWmsCrs( authid );
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locker.changeMode( QgsReadWriteLocker::Write );
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if ( !sDisableWktCache )
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sWktCache()->insert( wkt, *this );
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return result;
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setWktString( wkt );
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if ( d->mSrsId == 0 )
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{
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QString myName = QStringLiteral( " * %1 (%2...)" )
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.arg( QObject::tr( "Generated CRS", "A CRS automatically generated from layer info get this prefix for description" ),
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wkt.left( 50 ) );
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saveAsUserCrs( myName );
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}
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}
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#endif
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// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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// WARNING - wkt to proj conversion is lossy, hence we DON'T DO THIS on proj 6
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// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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#if PROJ_VERSION_MAJOR<6
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// create the proj4 structs needed for transforming
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char *proj4src = nullptr;
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OSRExportToProj4( d->mCRS, &proj4src );
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//now that we have the proj4string, delegate to createFromProj4 so
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// that we can try to fill in the remaining class members...
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//create from Proj will set the isValidFlag
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if ( !createFromProj4( proj4src ) )
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{
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CPLFree( proj4src );
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#if GDAL_VERSION_NUM < GDAL_COMPUTE_VERSION(2,5,0)
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// try fixed up version
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OSRFixup( d->mCRS );
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#endif
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OSRExportToProj4( d->mCRS, &proj4src );
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createFromProj4( proj4src );
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}
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#endif
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if ( d->mSrsId == 0 )
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{
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// TODO -- we should allow WKT based storage of custom CRS
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QString myName = QStringLiteral( " * %1 (%2)" )
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.arg( QObject::tr( "Generated CRS", "A CRS automatically generated from layer info get this prefix for description" ),
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toProj4() );
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saveAsUserCrs( myName );
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}
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#if PROJ_VERSION_MAJOR<6
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CPLFree( proj4src );
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#endif
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locker.changeMode( QgsReadWriteLocker::Write );
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if ( !sDisableWktCache )
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@ -1469,6 +1365,132 @@ void QgsCoordinateReferenceSystem::setProj4String( const QString &proj4String )
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setMapUnits();
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}
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bool QgsCoordinateReferenceSystem::setWktString( const QString &wkt )
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{
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bool res = false;
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d->mIsValid = false;
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#if PROJ_VERSION_MAJOR>=6
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PROJ_STRING_LIST warnings = nullptr;
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PROJ_STRING_LIST grammerErrors = nullptr;
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{
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QgsProjUtils::proj_pj_unique_ptr crs( proj_create_from_wkt( QgsProjContext::get(), wkt.toLatin1().constData(), nullptr, &warnings, &grammerErrors ) );
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d->mPj = QgsProjUtils::crsToSingleCrs( crs.get() );
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}
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res = static_cast< bool >( d->mPj );
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if ( !res )
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{
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QgsDebugMsg( QStringLiteral( "\n---------------------------------------------------------------" ) );
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QgsDebugMsg( QStringLiteral( "This CRS could *** NOT *** be set from the supplied Wkt " ) );
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QgsDebugMsg( "INPUT: " + wkt );
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for ( auto iter = warnings; iter && *iter; ++iter )
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QgsDebugMsg( *iter );
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for ( auto iter = grammerErrors; iter && *iter; ++iter )
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QgsDebugMsg( *iter );
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QgsDebugMsg( QStringLiteral( "---------------------------------------------------------------\n" ) );
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}
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proj_string_list_destroy( warnings );
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proj_string_list_destroy( grammerErrors );
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#else
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QByteArray ba = wkt.toLatin1();
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const char *pWkt = ba.data();
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OGRErr myInputResult = OSRImportFromWkt( d->mCRS, const_cast< char ** >( & pWkt ) );
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res = myInputResult == OGRERR_NONE;
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if ( !res )
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{
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QgsDebugMsg( QStringLiteral( "\n---------------------------------------------------------------" ) );
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QgsDebugMsg( QStringLiteral( "This CRS could *** NOT *** be set from the supplied Wkt " ) );
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QgsDebugMsg( "INPUT: " + wkt );
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QgsDebugMsg( QStringLiteral( "UNUSED WKT: %1" ).arg( pWkt ) );
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QgsDebugMsg( QStringLiteral( "---------------------------------------------------------------\n" ) );
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}
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#endif
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QgsReadWriteLocker locker( *sProj4CacheLock(), QgsReadWriteLocker::Read );
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if ( !res )
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{
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locker.changeMode( QgsReadWriteLocker::Write );
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if ( !sDisableWktCache )
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sWktCache()->insert( wkt, *this );
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return d->mIsValid;
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}
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#if PROJ_VERSION_MAJOR>=6
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if ( d->mPj )
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{
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// try 1 - maybe we can directly grab the auth name and code from the crs already?
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QString authName( proj_get_id_auth_name( d->mPj.get(), 0 ) );
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QString authCode( proj_get_id_code( d->mPj.get(), 0 ) );
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if ( authName.isEmpty() || authCode.isEmpty() )
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{
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// try 2, use proj's identify method and see if there's a nice candidate we can use
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QgsProjUtils::identifyCrs( d->mPj.get(), authName, authCode );
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}
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if ( !authName.isEmpty() && !authCode.isEmpty() )
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{
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if ( loadFromAuthCode( authName, authCode ) )
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{
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locker.changeMode( QgsReadWriteLocker::Write );
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if ( !sDisableWktCache )
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sWktCache()->insert( wkt, *this );
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return true;
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}
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}
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else
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{
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// Still a valid CRS, just not a known one
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d->mIsValid = true;
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}
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setMapUnits();
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}
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#else
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if ( OSRAutoIdentifyEPSG( d->mCRS ) == OGRERR_NONE )
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{
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QString authid = QStringLiteral( "%1:%2" )
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.arg( OSRGetAuthorityName( d->mCRS, nullptr ),
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OSRGetAuthorityCode( d->mCRS, nullptr ) );
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bool result = createFromOgcWmsCrs( authid );
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locker.changeMode( QgsReadWriteLocker::Write );
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if ( !sDisableWktCache )
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sWktCache()->insert( wkt, *this );
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return result;
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}
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#endif
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// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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// WARNING - wkt to proj conversion is lossy, hence we DON'T DO THIS on proj 6
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// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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#if PROJ_VERSION_MAJOR<6
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// create the proj4 structs needed for transforming
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char *proj4src = nullptr;
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OSRExportToProj4( d->mCRS, &proj4src );
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//now that we have the proj4string, delegate to createFromProj4 so
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// that we can try to fill in the remaining class members...
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//create from Proj will set the isValidFlag
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if ( !createFromProj4( proj4src ) )
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{
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CPLFree( proj4src );
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#if GDAL_VERSION_NUM < GDAL_COMPUTE_VERSION(2,5,0)
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// try fixed up version
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OSRFixup( d->mCRS );
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#endif
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OSRExportToProj4( d->mCRS, &proj4src );
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createFromProj4( proj4src );
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}
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CPLFree( proj4src );
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#endif
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return d->mIsValid;
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}
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void QgsCoordinateReferenceSystem::setGeographicFlag( bool geoFlag )
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{
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d.detach();
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@ -2056,10 +2078,15 @@ long QgsCoordinateReferenceSystem::saveAsUserCrs( const QString &name )
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{
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proj4String = toProj4();
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}
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QString wktString = d->mWkt;
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if ( wktString.isEmpty() )
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{
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wktString = toWkt();
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}
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// ellipsoid acroynym column is incorrect marked as not null in many crs database instances,
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// ellipsoid acroynym column is incorrectly marked as not null in many crs database instances,
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// hack around this by using an empty string instead
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const QString quotedEllipsoidString = ellipsoidAcronym().isNull() ? "''" : QgsSqliteUtils::quotedString( ellipsoidAcronym() );
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const QString quotedEllipsoidString = ellipsoidAcronym().isNull() ? QStringLiteral( "''" ) : QgsSqliteUtils::quotedString( ellipsoidAcronym() );
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//if this is the first record we need to ensure that its srs_id is 10000. For
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//any rec after that sqlite3 will take care of the autonumbering
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@ -2067,28 +2094,31 @@ long QgsCoordinateReferenceSystem::saveAsUserCrs( const QString &name )
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//the autoinc related system tables.
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if ( getRecordCount() == 0 )
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{
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mySql = "insert into tbl_srs (srs_id,description,projection_acronym,ellipsoid_acronym,parameters,is_geo) values ("
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mySql = "insert into tbl_srs (srs_id,description,projection_acronym,ellipsoid_acronym,parameters,is_geo,wkt) values ("
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+ QString::number( USER_CRS_START_ID )
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+ ',' + QgsSqliteUtils::quotedString( name )
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+ ',' + QgsSqliteUtils::quotedString( projectionAcronym() )
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+ ',' + ( !d->mProjectionAcronym.isEmpty() ? QgsSqliteUtils::quotedString( d->mProjectionAcronym ) : QStringLiteral( "''" ) )
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+ ',' + quotedEllipsoidString
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+ ',' + QgsSqliteUtils::quotedString( toProj4() )
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+ ",0)"; // <-- is_geo shamelessly hard coded for now
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+ ",0," // <-- is_geo shamelessly hard coded for now
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+ QgsSqliteUtils::quotedString( wktString )
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+ ')';
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}
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else
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{
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mySql = "insert into tbl_srs (description,projection_acronym,ellipsoid_acronym,parameters,is_geo) values ("
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mySql = "insert into tbl_srs (description,projection_acronym,ellipsoid_acronym,parameters,is_geo,wkt) values ("
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+ QgsSqliteUtils::quotedString( name )
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+ ',' + QgsSqliteUtils::quotedString( projectionAcronym() )
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+ ',' + ( !d->mProjectionAcronym.isEmpty() ? QgsSqliteUtils::quotedString( d->mProjectionAcronym ) : QStringLiteral( "''" ) )
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+ ',' + quotedEllipsoidString
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+ ',' + QgsSqliteUtils::quotedString( toProj4() )
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+ ",0)"; // <-- is_geo shamelessly hard coded for now
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+ ",0," // <-- is_geo shamelessly hard coded for now
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+ QgsSqliteUtils::quotedString( wktString )
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+ ')';
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}
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sqlite3_database_unique_ptr database;
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sqlite3_statement_unique_ptr statement;
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int myResult;
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//check the db is available
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myResult = database.open( QgsApplication::qgisUserDatabaseFilePath() );
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int myResult = database.open( QgsApplication::qgisUserDatabaseFilePath() );
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if ( myResult != SQLITE_OK )
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{
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QgsDebugMsg( QStringLiteral( "Can't open or create database %1: %2" )
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@ -2098,7 +2128,7 @@ long QgsCoordinateReferenceSystem::saveAsUserCrs( const QString &name )
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}
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statement = database.prepare( mySql, myResult );
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qint64 returnId;
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qint64 returnId = -1;
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if ( myResult == SQLITE_OK && statement.step() == SQLITE_DONE )
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{
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QgsMessageLog::logMessage( QObject::tr( "Saved user CRS [%1]" ).arg( toProj4() ), QObject::tr( "CRS" ) );
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@ -2120,10 +2150,7 @@ long QgsCoordinateReferenceSystem::saveAsUserCrs( const QString &name )
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projectionsAuthId.append( authid() );
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settings.setValue( QStringLiteral( "UI/recentProjectionsProj4" ), projectionsProj4 );
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settings.setValue( QStringLiteral( "UI/recentProjectionsAuthId" ), projectionsAuthId );
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}
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else
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returnId = -1;
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invalidateCache();
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return returnId;
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@ -654,9 +654,8 @@ class CORE_EXPORT QgsCoordinateReferenceSystem
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*/
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static int syncDatabase();
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/**
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* Save the proj4-string as a custom CRS.
|
||||
* Saves the CRS as a custom ("USER") CRS.
|
||||
*
|
||||
* Returns the new CRS srsid(), or -1 if the CRS could not be saved.
|
||||
*/
|
||||
@ -764,6 +763,11 @@ class CORE_EXPORT QgsCoordinateReferenceSystem
|
||||
*/
|
||||
void setProj4String( const QString &proj4String );
|
||||
|
||||
/**
|
||||
* Set the WKT string
|
||||
*/
|
||||
bool setWktString( const QString &wkt );
|
||||
|
||||
/**
|
||||
* Set this Geographic? flag
|
||||
* \param geoFlag Whether this is a geographic or projected coordinate system
|
||||
|
||||
@ -369,7 +369,42 @@ void TestQgsCoordinateReferenceSystem::createFromWktUnknown()
|
||||
// When used with proj < 6, a lossy conversion to proj string is used
|
||||
QCOMPARE( crs.toWkt(), wkt );
|
||||
#endif
|
||||
QVERIFY( crs.authid().startsWith( QStringLiteral( "USER" ) ) || crs.authid().isEmpty() );
|
||||
QCOMPARE( crs.srsid(), USER_CRS_START_ID + 1 );
|
||||
QCOMPARE( crs.authid(), QStringLiteral( "USER:100001" ) );
|
||||
QCOMPARE( crs.mapUnits(), QgsUnitTypes::DistanceMeters );
|
||||
|
||||
// try creating new ones with same def
|
||||
QgsCoordinateReferenceSystem crs2( QStringLiteral( "USER:100001" ) );
|
||||
QVERIFY( crs2.isValid() );
|
||||
#if PROJ_VERSION_MAJOR>=6
|
||||
QCOMPARE( crs2.toWkt(), wkt );
|
||||
#endif
|
||||
QCOMPARE( crs2.mapUnits(), QgsUnitTypes::DistanceMeters );
|
||||
|
||||
QgsCoordinateReferenceSystem crs3;
|
||||
crs3.createFromWkt( wkt );
|
||||
QVERIFY( crs3.isValid() );
|
||||
#if PROJ_VERSION_MAJOR>=6
|
||||
QCOMPARE( crs3.toWkt(), wkt );
|
||||
#endif
|
||||
QCOMPARE( crs3.mapUnits(), QgsUnitTypes::DistanceMeters );
|
||||
|
||||
// force reads from database
|
||||
QgsCoordinateReferenceSystem::invalidateCache();
|
||||
QgsCoordinateReferenceSystem crs4( QStringLiteral( "USER:100001" ) );
|
||||
QVERIFY( crs4.isValid() );
|
||||
#if PROJ_VERSION_MAJOR>=6
|
||||
QCOMPARE( crs4.toWkt(), wkt );
|
||||
#endif
|
||||
QCOMPARE( crs4.mapUnits(), QgsUnitTypes::DistanceMeters );
|
||||
|
||||
QgsCoordinateReferenceSystem crs5;
|
||||
crs5.createFromWkt( wkt );
|
||||
QVERIFY( crs5.isValid() );
|
||||
#if PROJ_VERSION_MAJOR>=6
|
||||
QCOMPARE( crs5.toWkt(), wkt );
|
||||
#endif
|
||||
QCOMPARE( crs5.mapUnits(), QgsUnitTypes::DistanceMeters );
|
||||
}
|
||||
|
||||
void TestQgsCoordinateReferenceSystem::fromWkt()
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user