Full text: Mapping without the sun

InSAR feature information can improve the performance of 
SPOT-derived ISP estimation, average error (AE) value 
decreased by about 3 percent to 12.93% and correlation 
coefficient (R2) value increased from 0.71 to 0.77. In addition, 
the results showed the potential of the use of just these InSAR 
features in impervious surface mapping. In this paper, InSAR- 
derived ISP estimations were comparable to those derived from 
SPOT multi-spectral images, although the SPOT-derived ISP 
images represented a higher performance. 
5000 -I 
, iiil 
llllllMlIl llll Hi mil 
-100 -75 
-50 -25 0 25 
ISP estimation error 
75 100 
Figure 7 Error histogram of estimated ISP derived from 3 
groups of remote sensing datasets (a) InSAR_3; (b) 
SPOT 4; (c) InSAR 3+SPOT 4 
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The work in this paper was supported by Competitive 
Earmarked Research Grant of the Hong Kong Research Grant 
Council (No. CUHK4665/06H) and Social Science and 
Education Panel Direct Grant of the Chinese University of 
Hong Kong. The first author was grateful to the Chinese 
University of Hong Kong for the Postgraduate Research 
Scholarship provided.

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