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IAPRS & SIS, Vol.34, Part 7, “Resource and Environmental Monitoring”, Hyderabad, India, 2002 
Field visit was made to collect the ground truth for verification 
and for preparation of accurate map. These data sets are 
geometrically rectified to the geo-referenced study area base 
map using standard image to image tie-up procedure. The 
standard data enhancement techniques, like linear stretch, 
contrast enhancement, etc., and RGB-IHS-RGB data fusion for 
PAN and LISS III data merging were used for better 
representation of output product. The FCC of 1989 and its 
interpreted maps through onscreen digitization (visual image 
interpretation) along with 1999 are presented in figures 2 (a), 
2(b) and 3(a), 3(b) respectively. The images and maps of the 
other years are not presented due to limitation in length of the 
paper. 
Table 1. Characteristics of different satellite sensors used in the 
present study 
  
Satellite Landsat IRS 1A/1B IRS 1C/1D Characteristics TM  LISS-II 
LISS-III PAN 
Wave lengths 0.45-0.52 0.45-0.52 
in micro meters 
0.52-0.60 0.52-0.59 0.52-0.59 0.50-0.75 
0.63-0.69 0.62-0.68 0.62-0.68 
0.76-0.90 0.77-0.86 0.77-0.86 
1.55-1.75 1.55-1.70* 
10.5-12.50 
2.08-2.35 
Spatial Resolution 
in meters |. 30 X 30 36X36 23.5X23.5 5.8X5.8 
Scene coverage 
in kilo meters 185X185 148X148 140X140 70 X 70 
Repetitivity 
in days 16 22 341 orbis/24 days 
An 
Submerged weeds 
EN Paddy fields 
NM Fish ponds 
Fa Standing water 
      
  
    
  
Fionre 2 
Interpreted map of study area during November, 1989 
Figure 2 (b) 
FCC of IRS-1D LISS-III image covering 
Study area during March, 1999 
  
* Spatial Resolution is 70.5 X 70.5 meters and 
Scene coverage is 148 X 148 km. 
4. RESULTS AND DISCUSSION 
The study geographically located in between latitudes 16°25’ N 
- 16°35’ N and longitudes 81° 00’ E - 81° 30’ E. The study 
area is nearly 20 Kms away from the coast line. The beach 
ridges seen in the study area indicates the procreation of the 
457 
  
FCC of Landsat-TM covering 
study area duing November, 1989 
TEEN char erm 
Figure 3 (a)