38    static void linear( 
const QVector<QgsPointXY> &sourceCoordinates, 
const QVector<QgsPointXY> &destinationCoordinates, 
QgsPointXY &origin, 
double &pixelXSize, 
double &pixelYSize );
 
   44    static void helmert( 
const QVector<QgsPointXY> &sourceCoordinates, 
const QVector<QgsPointXY> &destinationCoordinates, 
QgsPointXY &origin, 
double &pixelSize, 
double &rotation );
 
   47    static void affine( QVector<QgsPointXY> mapCoords,
 
   48                        QVector<QgsPointXY> pixelCoords );
 
   56    static void projective( 
const QVector<QgsPointXY> &sourceCoordinates, 
const QVector<QgsPointXY> &destinationCoordinates, 
double H[9] );