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dd9dfb0d08
Many scopes/remark cross reference these, so by showing them in the table of available operations we give users more clues how to pick the correct one.
387 lines
14 KiB
C++
387 lines
14 KiB
C++
/***************************************************************************
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qgsdatumtransform.cpp
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------------------------
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begin : Dec 2017
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copyright : (C) 2017 Nyall Dawson
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email : nyall dot dawson at gmail dot com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include "qgsdatumtransform.h"
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#include "qgscoordinatereferencesystem.h"
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#include "qgsapplication.h"
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#include "qgssqliteutils.h"
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#include <sqlite3.h>
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#if PROJ_VERSION_MAJOR>=6
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#include "qgsprojutils.h"
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#include <proj.h>
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#endif
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QList<QgsDatumTransform::TransformDetails> QgsDatumTransform::operations( const QgsCoordinateReferenceSystem &source, const QgsCoordinateReferenceSystem &destination )
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{
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QList< QgsDatumTransform::TransformDetails > res;
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#if PROJ_VERSION_MAJOR<6
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Q_UNUSED( source )
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Q_UNUSED( destination )
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#else
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if ( !source.projObject() || !destination.projObject() )
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return res;
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PJ_CONTEXT *pjContext = QgsProjContext::get();
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PJ_OPERATION_FACTORY_CONTEXT *operationContext = proj_create_operation_factory_context( pjContext, nullptr );
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// We want to return ALL grids, not just those available for use
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proj_operation_factory_context_set_grid_availability_use( pjContext, operationContext, PROJ_GRID_AVAILABILITY_IGNORED );
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// See https://lists.osgeo.org/pipermail/proj/2019-May/008604.html
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proj_operation_factory_context_set_spatial_criterion( pjContext, operationContext, PROJ_SPATIAL_CRITERION_PARTIAL_INTERSECTION );
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if ( PJ_OBJ_LIST *ops = proj_create_operations( pjContext, source.projObject(), destination.projObject(), operationContext ) )
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{
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int count = proj_list_get_count( ops );
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for ( int i = 0; i < count; ++i )
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{
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QgsProjUtils::proj_pj_unique_ptr op( proj_list_get( pjContext, ops, i ) );
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if ( !op )
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continue;
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res.push_back( transformDetailsFromPj( op.get() ) );
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}
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proj_list_destroy( ops );
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}
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proj_operation_factory_context_destroy( operationContext );
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#endif
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return res;
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}
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QList< QgsDatumTransform::TransformPair > QgsDatumTransform::datumTransformations( const QgsCoordinateReferenceSystem &srcCRS, const QgsCoordinateReferenceSystem &destCRS )
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{
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QList< QgsDatumTransform::TransformPair > transformations;
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QString srcGeoId = srcCRS.geographicCrsAuthId();
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QString destGeoId = destCRS.geographicCrsAuthId();
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if ( srcGeoId.isEmpty() || destGeoId.isEmpty() )
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{
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return transformations;
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}
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QStringList srcSplit = srcGeoId.split( ':' );
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QStringList destSplit = destGeoId.split( ':' );
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if ( srcSplit.size() < 2 || destSplit.size() < 2 )
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{
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return transformations;
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}
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int srcAuthCode = srcSplit.at( 1 ).toInt();
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int destAuthCode = destSplit.at( 1 ).toInt();
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if ( srcAuthCode == destAuthCode )
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{
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return transformations; //crs have the same datum
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}
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QList<int> directTransforms;
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searchDatumTransform( QStringLiteral( "SELECT coord_op_code FROM tbl_datum_transform WHERE source_crs_code=%1 AND target_crs_code=%2 ORDER BY deprecated ASC,preferred DESC" ).arg( srcAuthCode ).arg( destAuthCode ),
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directTransforms );
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QList<int> reverseDirectTransforms;
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searchDatumTransform( QStringLiteral( "SELECT coord_op_code FROM tbl_datum_transform WHERE source_crs_code = %1 AND target_crs_code=%2 ORDER BY deprecated ASC,preferred DESC" ).arg( destAuthCode ).arg( srcAuthCode ),
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reverseDirectTransforms );
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QList<int> srcToWgs84;
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searchDatumTransform( QStringLiteral( "SELECT coord_op_code FROM tbl_datum_transform WHERE (source_crs_code=%1 AND target_crs_code=%2) OR (source_crs_code=%2 AND target_crs_code=%1) ORDER BY deprecated ASC,preferred DESC" ).arg( srcAuthCode ).arg( 4326 ),
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srcToWgs84 );
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QList<int> destToWgs84;
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searchDatumTransform( QStringLiteral( "SELECT coord_op_code FROM tbl_datum_transform WHERE (source_crs_code=%1 AND target_crs_code=%2) OR (source_crs_code=%2 AND target_crs_code=%1) ORDER BY deprecated ASC,preferred DESC" ).arg( destAuthCode ).arg( 4326 ),
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destToWgs84 );
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//add direct datum transformations
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for ( int transform : qgis::as_const( directTransforms ) )
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{
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transformations.push_back( QgsDatumTransform::TransformPair( transform, -1 ) );
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}
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//add direct datum transformations
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for ( int transform : qgis::as_const( reverseDirectTransforms ) )
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{
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transformations.push_back( QgsDatumTransform::TransformPair( -1, transform ) );
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}
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for ( int srcTransform : qgis::as_const( srcToWgs84 ) )
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{
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for ( int destTransform : qgis::as_const( destToWgs84 ) )
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{
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transformations.push_back( QgsDatumTransform::TransformPair( srcTransform, destTransform ) );
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}
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}
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return transformations;
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}
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void QgsDatumTransform::searchDatumTransform( const QString &sql, QList< int > &transforms )
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{
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sqlite3_database_unique_ptr database;
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int openResult = database.open_v2( QgsApplication::srsDatabaseFilePath(), SQLITE_OPEN_READONLY, nullptr );
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if ( openResult != SQLITE_OK )
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{
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return;
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}
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sqlite3_statement_unique_ptr statement;
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int prepareRes;
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statement = database.prepare( sql, prepareRes );
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if ( prepareRes != SQLITE_OK )
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{
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return;
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}
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QString cOpCode;
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while ( statement.step() == SQLITE_ROW )
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{
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cOpCode = statement.columnAsText( 0 );
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transforms.push_back( cOpCode.toInt() );
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}
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}
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QString QgsDatumTransform::datumTransformToProj( int datumTransform )
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{
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QString transformString;
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sqlite3_database_unique_ptr database;
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int openResult = database.open_v2( QgsApplication::srsDatabaseFilePath(), SQLITE_OPEN_READONLY, nullptr );
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if ( openResult != SQLITE_OK )
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{
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return transformString;
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}
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sqlite3_statement_unique_ptr statement;
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QString sql = QStringLiteral( "SELECT coord_op_method_code,p1,p2,p3,p4,p5,p6,p7 FROM tbl_datum_transform WHERE coord_op_code=%1" ).arg( datumTransform );
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int prepareRes;
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statement = database.prepare( sql, prepareRes );
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if ( prepareRes != SQLITE_OK )
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{
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return transformString;
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}
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if ( statement.step() == SQLITE_ROW )
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{
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//coord_op_methode_code
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int methodCode = statement.columnAsInt64( 0 );
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if ( methodCode == 9615 ) //ntv2
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{
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transformString = "+nadgrids=" + statement.columnAsText( 1 );
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}
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else if ( methodCode == 9603 || methodCode == 9606 || methodCode == 9607 )
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{
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transformString += QLatin1String( "+towgs84=" );
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double p1 = statement.columnAsDouble( 1 );
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double p2 = statement.columnAsDouble( 2 );
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double p3 = statement.columnAsDouble( 3 );
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double p4 = statement.columnAsDouble( 4 );
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double p5 = statement.columnAsDouble( 5 );
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double p6 = statement.columnAsDouble( 6 );
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double p7 = statement.columnAsDouble( 7 );
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if ( methodCode == 9603 ) //3 parameter transformation
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{
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transformString += QStringLiteral( "%1,%2,%3" ).arg( QString::number( p1 ), QString::number( p2 ), QString::number( p3 ) );
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}
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else //7 parameter transformation
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{
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transformString += QStringLiteral( "%1,%2,%3,%4,%5,%6,%7" ).arg( QString::number( p1 ), QString::number( p2 ), QString::number( p3 ), QString::number( p4 ), QString::number( p5 ), QString::number( p6 ), QString::number( p7 ) );
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}
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}
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}
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return transformString;
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}
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int QgsDatumTransform::projStringToDatumTransformId( const QString &string )
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{
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sqlite3_database_unique_ptr database;
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int openResult = database.open_v2( QgsApplication::srsDatabaseFilePath(), SQLITE_OPEN_READONLY, nullptr );
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if ( openResult != SQLITE_OK )
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{
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return -1;
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}
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sqlite3_statement_unique_ptr statement;
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QString sql = QStringLiteral( "SELECT coord_op_method_code,p1,p2,p3,p4,p5,p6,p7,coord_op_code FROM tbl_datum_transform" );
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int prepareRes;
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statement = database.prepare( sql, prepareRes );
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if ( prepareRes != SQLITE_OK )
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{
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return -1;
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}
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while ( statement.step() == SQLITE_ROW )
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{
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QString transformString;
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//coord_op_methode_code
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int methodCode = statement.columnAsInt64( 0 );
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if ( methodCode == 9615 ) //ntv2
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{
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transformString = "+nadgrids=" + statement.columnAsText( 1 );
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}
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else if ( methodCode == 9603 || methodCode == 9606 || methodCode == 9607 )
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{
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transformString += QLatin1String( "+towgs84=" );
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double p1 = statement.columnAsDouble( 1 );
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double p2 = statement.columnAsDouble( 2 );
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double p3 = statement.columnAsDouble( 3 );
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double p4 = statement.columnAsDouble( 4 );
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double p5 = statement.columnAsDouble( 5 );
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double p6 = statement.columnAsDouble( 6 );
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double p7 = statement.columnAsDouble( 7 );
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if ( methodCode == 9603 ) //3 parameter transformation
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{
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transformString += QStringLiteral( "%1,%2,%3" ).arg( QString::number( p1 ), QString::number( p2 ), QString::number( p3 ) );
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}
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else //7 parameter transformation
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{
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transformString += QStringLiteral( "%1,%2,%3,%4,%5,%6,%7" ).arg( QString::number( p1 ), QString::number( p2 ), QString::number( p3 ), QString::number( p4 ), QString::number( p5 ), QString::number( p6 ), QString::number( p7 ) );
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}
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}
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if ( transformString.compare( string, Qt::CaseInsensitive ) == 0 )
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{
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return statement.columnAsInt64( 8 );
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}
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}
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return -1;
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}
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QgsDatumTransform::TransformInfo QgsDatumTransform::datumTransformInfo( int datumTransform )
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{
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QgsDatumTransform::TransformInfo info;
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sqlite3_database_unique_ptr database;
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int openResult = database.open_v2( QgsApplication::srsDatabaseFilePath(), SQLITE_OPEN_READONLY, nullptr );
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if ( openResult != SQLITE_OK )
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{
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return info;
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}
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sqlite3_statement_unique_ptr statement;
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QString sql = QStringLiteral( "SELECT epsg_nr,source_crs_code,target_crs_code,remarks,scope,preferred,deprecated FROM tbl_datum_transform WHERE coord_op_code=%1" ).arg( datumTransform );
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int prepareRes;
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statement = database.prepare( sql, prepareRes );
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if ( prepareRes != SQLITE_OK )
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{
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return info;
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}
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int srcCrsId, destCrsId;
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if ( statement.step() != SQLITE_ROW )
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{
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return info;
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}
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info.datumTransformId = datumTransform;
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info.epsgCode = statement.columnAsInt64( 0 );
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srcCrsId = statement.columnAsInt64( 1 );
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destCrsId = statement.columnAsInt64( 2 );
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info.remarks = statement.columnAsText( 3 );
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info.scope = statement.columnAsText( 4 );
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info.preferred = statement.columnAsInt64( 5 ) != 0;
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info.deprecated = statement.columnAsInt64( 6 ) != 0;
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QgsCoordinateReferenceSystem srcCrs = QgsCoordinateReferenceSystem::fromOgcWmsCrs( QStringLiteral( "EPSG:%1" ).arg( srcCrsId ) );
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info.sourceCrsDescription = srcCrs.description();
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info.sourceCrsAuthId = srcCrs.authid();
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QgsCoordinateReferenceSystem destCrs = QgsCoordinateReferenceSystem::fromOgcWmsCrs( QStringLiteral( "EPSG:%1" ).arg( destCrsId ) );
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info.destinationCrsDescription = destCrs.description();
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info.destinationCrsAuthId = destCrs.authid();
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return info;
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}
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#if PROJ_VERSION_MAJOR >= 6
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QgsDatumTransform::TransformDetails QgsDatumTransform::transformDetailsFromPj( PJ *op )
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{
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PJ_CONTEXT *pjContext = QgsProjContext::get();
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TransformDetails details;
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if ( !op )
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return details;
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QgsProjUtils::proj_pj_unique_ptr normalized( proj_normalize_for_visualization( pjContext, op ) );
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if ( normalized )
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details.proj = QString( proj_as_proj_string( pjContext, normalized.get(), PJ_PROJ_5, nullptr ) );
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if ( details.proj.isEmpty() )
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details.proj = QString( proj_as_proj_string( pjContext, op, PJ_PROJ_5, nullptr ) );
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details.name = QString( proj_get_name( op ) );
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details.accuracy = proj_coordoperation_get_accuracy( pjContext, op );
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details.isAvailable = proj_coordoperation_is_instantiable( pjContext, op );
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details.authority = QString( proj_get_id_auth_name( op, 0 ) );
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details.code = QString( proj_get_id_code( op, 0 ) );
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const char *areaOfUseName = nullptr;
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if ( proj_get_area_of_use( pjContext, op, nullptr, nullptr, nullptr, nullptr, &areaOfUseName ) )
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{
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details.areaOfUse = QString( areaOfUseName );
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}
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#if PROJ_VERSION_MAJOR > 6 or PROJ_VERSION_MINOR >= 2
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details.remarks = QString( proj_get_remarks( op ) );
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details.scope = QString( proj_get_scope( op ) );
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#endif
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for ( int j = 0; j < proj_coordoperation_get_grid_used_count( pjContext, op ); ++j )
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{
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const char *shortName = nullptr;
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const char *fullName = nullptr;
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const char *packageName = nullptr;
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const char *url = nullptr;
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int directDownload = 0;
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int openLicense = 0;
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int isAvailable = 0;
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proj_coordoperation_get_grid_used( pjContext, op, j, &shortName, &fullName, &packageName, &url, &directDownload, &openLicense, &isAvailable );
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GridDetails gridDetails;
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gridDetails.shortName = QString( shortName );
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gridDetails.fullName = QString( fullName );
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gridDetails.packageName = QString( packageName );
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gridDetails.url = QString( url );
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gridDetails.directDownload = directDownload;
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gridDetails.openLicense = openLicense;
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gridDetails.isAvailable = isAvailable;
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details.grids.append( gridDetails );
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}
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#if PROJ_VERSION_MAJOR > 6 or PROJ_VERSION_MINOR >= 2
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for ( int j = 0; j < proj_concatoperation_get_step_count( pjContext, op ); ++j )
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{
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QgsProjUtils::proj_pj_unique_ptr step( proj_concatoperation_get_step( pjContext, op, j ) );
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if ( step )
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{
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SingleOperationDetails singleOpDetails;
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singleOpDetails.remarks = QString( proj_get_remarks( step.get() ) );
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singleOpDetails.scope = QString( proj_get_scope( step.get() ) );
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singleOpDetails.authority = QString( proj_get_id_auth_name( step.get(), 0 ) );
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singleOpDetails.code = QString( proj_get_id_code( step.get(), 0 ) );
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const char *areaOfUseName = nullptr;
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if ( proj_get_area_of_use( pjContext, step.get(), nullptr, nullptr, nullptr, nullptr, &areaOfUseName ) )
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{
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singleOpDetails.areaOfUse = QString( areaOfUseName );
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}
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details.operationDetails.append( singleOpDetails );
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}
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}
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#endif
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return details;
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}
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#endif
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