International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B7, 2012 
XXII ISPRS Congress, 25 August — 01 September 2012, Melbourne, Australia 
  
(a) (b) (c) 
Figure 2 Portions of land cover classification results using difference data combinations for Hengshui area: (a) ETM- data alone; (b) 
SPOT 5 alone; (c) Combined ETM- and SPOT 5 data using WOE.