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be less restrictive on interpreting CRSes

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git-svn-id: http://svn.osgeo.org/qgis/trunk@15361 c8812cc2-4d05-0410-92ff-de0c093fc19c
This commit is contained in:
jef 2011-03-06 13:52:21 +00:00
parent 8469b94738
commit 8398244065
1 changed files with 31 additions and 26 deletions
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57
src/core/qgscoordinatereferencesystem.cpp
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@ -302,7 +302,18 @@ bool QgsCoordinateReferenceSystem::createFromWkt( QString theWkt )
//now that we have the proj4string, delegate to createFromProj4 so
// that we can try to fill in the remaining class members...
//create from Proj will set the isValidFlag
createFromProj4( QString( proj4src ) );
if ( !createFromProj4( proj4src ) )
{
CPLFree( proj4src );
// try fixed up version
OSRFixup( mCRS );
OSRExportToProj4( mCRS, &proj4src );
createFromProj4( proj4src );
}
CPLFree( proj4src );
return mIsValidFlag;
@ -324,42 +335,36 @@ bool QgsCoordinateReferenceSystem::createFromProj4( const QString theProj4String
// +proj=lcc +lat_1=46.8 +lat_0=46.8 +lon_0=2.337229166666664 +k_0=0.99987742
// +x_0=600000 +y_0=2200000 +a=6378249.2 +b=6356515.000000472 +units=m +no_defs
//
QgsDebugMsg( "proj4: " + theProj4String );
mIsValidFlag = false;
QRegExp myProjRegExp( "\\+proj=\\S+" );
int myStart = 0;
int myLength = 0;
myStart = myProjRegExp.indexIn( theProj4String, myStart );
QRegExp myProjRegExp( "\\+proj=(\\S+)" );
int myStart = myProjRegExp.indexIn( theProj4String );
if ( myStart == -1 )
{
QgsDebugMsg( "error proj string supplied has no +proj argument" );
QgsDebugMsg( "proj string supplied has no +proj argument" );
return mIsValidFlag;
}
mProjectionAcronym = myProjRegExp.cap( 1 );
QRegExp myEllipseRegExp( "\\+ellps=(\\S+)" );
myStart = myEllipseRegExp.indexIn( theProj4String );
if ( myStart == -1 )
{
QgsDebugMsg( "proj string supplied has no +ellps argument" );
mEllipsoidAcronym = "";
}
else
{
myLength = myProjRegExp.matchedLength();
mEllipsoidAcronym = myEllipseRegExp.cap( 1 );
}
mProjectionAcronym = theProj4String.mid( myStart + PROJ_PREFIX_LEN, myLength - PROJ_PREFIX_LEN );
QRegExp myEllipseRegExp( "\\+ellps=\\S+" );
myStart = 0;
myLength = 0;
myStart = myEllipseRegExp.indexIn( theProj4String, myStart );
if ( myStart != -1 )
QRegExp myAxisRegExp( "\\+a=(\\S+)" );
myStart = myAxisRegExp.indexIn( theProj4String );
if ( myStart == -1 )
{
myLength = myEllipseRegExp.matchedLength();
mEllipsoidAcronym = theProj4String.mid( myStart + ELLPS_PREFIX_LEN, myLength - ELLPS_PREFIX_LEN );
}
QRegExp myAxisRegExp( "\\+a=\\S+" );
myStart = 0;
myLength = 0;
myStart = myAxisRegExp.indexIn( theProj4String, myStart );
if ( myStart == -1 && mEllipsoidAcronym.isNull() )
{
QgsDebugMsg( "proj string supplied has no +ellps or +a argument" );
return mIsValidFlag;
QgsDebugMsg( "proj string supplied has no +a argument" );
}
/*