Fixed bug in read_band method of GdalRasterData.

git-svn-id: https://svn.seismo.oma.be/svn/seismo/mapping/layeredbasemap/trunk@7455 40b490c5-b4d9-47cb-8714-9bef99b524d5

data_types/grid.py

@@ -1132,8 +1132,8 @@ class GdalRasterData(MeshGridData):
 		yoff = self._get_y_index(self.y0)
 		buf_xsize = self.ncols
 		buf_ysize = self.nrows
-		win_xsize = int(round(abs((self._x0 - self._x1) / self._dx))) + 1
-		win_ysize = int(round(abs((self._y0 - self._y1) / self._dy))) + 1
+		win_xsize = int(round(abs((self.x0 - self.x1) / self._dx))) + 1
+		win_ysize = int(round(abs((self.y0 - self.y1) / self._dy))) + 1
 
 		values = band.ReadAsArray(xoff=xoff, yoff=yoff, win_xsize=win_xsize,
 				win_ysize=win_ysize, buf_xsize=buf_xsize, buf_ysize=buf_ysize)