"FAO SOIL MAPPING UNITS AND URBAN AREAS 
[MEDIETATE TR 
L] 
= 
m 
[:] 
B. 
[M 
BC 
4 
Figure 6. FAO Soils Map used in this study. 
    
  
4.5 Future Work 
Our future work will focus on better methods of quantifiction 
of the impacts of urban land use on global productivity using 
soil and climate based models. We also continue to work 
with nighttime sensors, particularly new radiance and gain 
controlled data from the DMSP/OLS and more precise 
methods for extracting distinct levels of urban land use from 
the data sets. 
S. ACKNOWLEDGEMENTS 
This work was supported by the National Aeronautics and 
Space Administration Mission to Planet Earth Program. We 
would like to thank NASA Headquarter’s staff, and 
particularly Dr. Robert Harriss for their support. The work 
supported here lead directly to further successfully funded 
research as part of Earth Observing System Interdisciplinary 
Research Program. Further support from the USRA Summer 
Internship Program enabled Mr. Kerle to work on site with 
us during the summer of 1997. : 
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