The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part Bl. Beijing 2008 
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In addition to the standard C-SAP TS5 dataset, it was also used 
a 90m grid spacing radar DTM generated from the SRTM and 
available from NASA (Figure 4). 
users to produce high precision cartographic products and 
DTMs. Its location accuracy is better than 250m (3cr=220m for 
system level correction, Level 1) (Krishnaswamy and 
Kalyanaraman, 2002; National Remote Sensing Agency, 2007). 
(b) 
Figure 1. Cartosat-1 stereo orthokit collected over Mausanne les 
Alpilles (France) on January 31, 2006. (a) Aft panchromatic 
image, (b) Fore panchromatic image. 
2.3 Standard accuracy of Cartsat-1 images 
Figure 2. High-resolution reference DTM (ADS40_DTM) for 
Mausanne les Alpilles (France) test site produced using a Leica 
ADS40 digital camera. 
4,855, 
4,850, 
_ 4,845, 
~ 4,840, 
JC 
o 4,835, 
Z 4,830, 
4,825, 
4,820, 
000 
000 
000 
000 
000 
000 
000 
000 
624,000 632,000 640,000 648,000 656,000 664,000 
East(m) 
• • 
• 
• 
• • 
# 
• 
• 
• • 
* • 
• • 
• 
• 
• 
• 
» • 
• • • 
• 
Figure 3. Ground control points distribution over the study area. 
Figure 4. Low-resolution global Shuttle Radar Topography 
Mission (SRTM) DTM supplied by NASA. 
ISRO delivered to the study team Cartosat-1 imagery as Stereo 
Orthokit product in GeoTIFF format and also supplied 
predetermined Rational Polynomial Coefficients (RPCs) (Indian 
Space Research Organisation, 2005). The GeoTIFF Orthokit 
product is a radiometrically corrected data and is supplied to