Percent Crop Area Regression : Belgium-France-Germany-Holland 
FIGURE 2 : Cropland land cover validation results. 
ACKNOWLEDGEMENTS 
We are grateful to Arthur Stein for his technical assistance and to Jaques Megier, Sten 
Folving and Pam Kennedy for having made this work possible. 
REFERENCES 
Achard, F. and Blasco, F., 1990, Analysis of vegetation seasonal evolution and mapping of 
forest cover in W.Africa with the use of NOAA HRPT data, Photogrammetric Engineering 
and Remote Sensing, Vol.56, 1359-1365.