27         double      dfDeltaX, dfDeltaY;  in zoomPoint()  local
71         dfDeltaY = poGeorefExt->maxy - poGeorefExt->miny;  in zoomPoint()
73         dY = dfDeltaY/((double)height);  in zoomPoint()
87             oNewGeorefExt.miny = dfGeoPosY - (dfDeltaY/(2*zoomfactor));          in zoomPoint()
89             oNewGeorefExt.maxy = dfGeoPosY + (dfDeltaY/(2*zoomfactor));  in zoomPoint()
94             oNewGeorefExt.miny = dfGeoPosY - (dfDeltaY/2)*(abs(zoomfactor));      in zoomPoint()
96             oNewGeorefExt.maxy = dfGeoPosY + (dfDeltaY/2)*(abs(zoomfactor));  in zoomPoint()
101             oNewGeorefExt.miny = dfGeoPosY - (dfDeltaY/2);  in zoomPoint()
103             oNewGeorefExt.maxy = dfGeoPosY + (dfDeltaY/2);  in zoomPoint()
144             dfDeltaY = oNewGeorefExt.maxy - oNewGeorefExt.miny;  in zoomPoint()
150             if (dfDeltaY > (poMaxGeorefExt->maxy-poMaxGeorefExt->miny))  in zoomPoint()
151                 dfDeltaY = poMaxGeorefExt->maxy-poMaxGeorefExt->miny;  in zoomPoint()
163                 oNewGeorefExt.maxy =  oNewGeorefExt.miny + dfDeltaY;  in zoomPoint()
167                 oNewGeorefExt.miny = oNewGeorefExt.maxy - dfDeltaY;  in zoomPoint()
181         dfDeltaY = self->extent.maxy - self->extent.miny;   in zoomPoint()
194                 self->extent.maxy =  self->extent.miny + dfDeltaY;  in zoomPoint()
198                 oNewGeorefExt.miny = oNewGeorefExt.maxy - dfDeltaY;  in zoomPoint()
209         double      dfDeltaX, dfDeltaY;  in zoomRectangle()  local
270         dfDeltaY = poGeorefExt->maxy - poGeorefExt->miny;  in zoomRectangle()
311             dfDeltaY = oNewGeorefExt.maxy - oNewGeorefExt.miny;  in zoomRectangle()
317             if (dfDeltaY > (poMaxGeorefExt->maxy-poMaxGeorefExt->miny))  in zoomRectangle()
318                 dfDeltaY = poMaxGeorefExt->maxy-poMaxGeorefExt->miny;  in zoomRectangle()
330                 oNewGeorefExt.maxy =  oNewGeorefExt.miny + dfDeltaY;  in zoomRectangle()
334                 oNewGeorefExt.miny = oNewGeorefExt.maxy - dfDeltaY;  in zoomRectangle()
345         dfDeltaY = self->extent.maxy - self->extent.miny;   in zoomRectangle()
358                 self->extent.maxy =  self->extent.miny + dfDeltaY;  in zoomRectangle()
362                 oNewGeorefExt.miny = oNewGeorefExt.maxy - dfDeltaY;  in zoomRectangle()
383         double      dfDeltaX, dfDeltaY;  in zoomScale()  local
430         dfDeltaY = poGeorefExt->maxy - poGeorefExt->miny;  in zoomScale()
432         dY = dfDeltaY/((double)height);  in zoomScale()
512             dfDeltaY = oNewGeorefExt.maxy - oNewGeorefExt.miny;  in zoomScale()
518             if (dfDeltaY > (poMaxGeorefExt->maxy-poMaxGeorefExt->miny))  in zoomScale()
519                 dfDeltaY = poMaxGeorefExt->maxy-poMaxGeorefExt->miny;  in zoomScale()
531                 oNewGeorefExt.maxy =  oNewGeorefExt.miny + dfDeltaY;  in zoomScale()
535                 oNewGeorefExt.miny = oNewGeorefExt.maxy - dfDeltaY;  in zoomScale()
546         dfDeltaY = self->extent.maxy - self->extent.miny;   in zoomScale()
559                 self->extent.maxy =  self->extent.miny + dfDeltaY;  in zoomScale()
563                 oNewGeorefExt.miny = oNewGeorefExt.maxy - dfDeltaY;  in zoomScale()