sharpetronics/QGIS
1
0
Fork 0
mirror of https://github.com/qgis/QGIS.git synced 2025-02-22 00:06:12 -05:00
Code Issues Packages Projects Releases Wiki Activity

Handle polar CRS with NE axis order

Browse Source
This commit is contained in:
Patrik Sylve 2025-02-13 17:17:33 +01:00 committed by Nyall Dawson
parent 9e127a8358
commit 4b9e1d665e
2 changed files with 39 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
src/core/proj/qgsprojutils.cpp
View File

@ -113,6 +113,7 @@ bool QgsProjUtils::usesAngularUnit( const QString &projDef )
bool QgsProjUtils::axisOrderIsSwapped( const PJ *crs )
{
//ported from https://github.com/pramsey/postgis/blob/7ecf6839c57a838e2c8540001a3cd35b78a730db/liblwgeom/lwgeom_transform.c#L299
//and GDAL OGRSpatialReference::isNorthEastAxisOrder https://github.com/OSGeo/gdal/blob/release/3.10/ogr/ogrspatialreference.cpp#L419
if ( !crs )
return false;
@ -129,19 +130,46 @@ bool QgsProjUtils::axisOrderIsSwapped( const PJ *crs )
const int axisCount = proj_cs_get_axis_count( context, pjCs.get() );
if ( axisCount > 0 )
{
const char *outDirection = nullptr;
// Read only first axis, see if it is degrees / north
const char *outDirection0 = nullptr;
const char *outDirection1 = nullptr;
const char *outName0 = nullptr;
const char *outName1 = nullptr;
proj_cs_get_axis_info( context, pjCs.get(), 0,
&outName0,
nullptr,
nullptr,
&outDirection,
&outDirection0,
nullptr,
nullptr,
nullptr,
nullptr
);
return QString( outDirection ).compare( QLatin1String( "north" ), Qt::CaseInsensitive ) == 0;
proj_cs_get_axis_info( context, pjCs.get(), 1,
&outName1,
nullptr,
&outDirection1,
nullptr,
nullptr,
nullptr,
nullptr
);
if ( QString( outDirection0 ).compare( QLatin1String( "north" ), Qt::CaseInsensitive ) == 0 &&
QString( outDirection1 ).compare( QLatin1String( "east" ), Qt::CaseInsensitive ) == 0 )
{
return true;
}
// Handle polar projections with NE-order
if ( ( QString( outDirection0 ).compare( QLatin1String( "north" ), Qt::CaseInsensitive ) == 0 &&
QString( outDirection1 ).compare( QLatin1String( "north" ), Qt::CaseInsensitive ) == 0 ) ||
( QString( outDirection0 ).compare( QLatin1String( "south" ), Qt::CaseInsensitive ) == 0 &&
QString( outDirection1 ).compare( QLatin1String( "south" ), Qt::CaseInsensitive ) == 0 ) )
{
return QString( outName0 ).startsWith( QLatin1String( "northing" ), Qt::CaseInsensitive ) &&
QString( outName1 ).startsWith( QLatin1String( "easting" ), Qt::CaseInsensitive ) ;
}
}
return false;
}

6
tests/src/core/testqgsprojutils.cpp
View File

@ -95,6 +95,12 @@ void TestQgsProjUtils::axisOrderIsSwapped()
QVERIFY( QgsProjUtils::axisOrderIsSwapped( crs.get() ) );
crs.reset( proj_create( context, "urn:ogc:def:crs:EPSG::3903" ) );
QVERIFY( QgsProjUtils::axisOrderIsSwapped( crs.get() ) );
crs.reset( proj_create( context, "urn:ogc:def:crs:EPSG::32761" ) );
QVERIFY( QgsProjUtils::axisOrderIsSwapped( crs.get() ) );
crs.reset( proj_create( context, "urn:ogc:def:crs:EPSG::5482" ) );
QVERIFY( QgsProjUtils::axisOrderIsSwapped( crs.get() ) );
crs.reset( proj_create( context, "urn:ogc:def:crs:EPSG::32661" ) );
QVERIFY( QgsProjUtils::axisOrderIsSwapped( crs.get() ) );
}
void TestQgsProjUtils::searchPath()