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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV. Part B4 Istanbul 2004 
  
    
   
m 
en 
SPOT-P 
GSD-10m 
LANDSAT-TM 
(PAN GSD-30m 
(TM) 
Statistics 
Variogram 
| Correlation Matrix 
. Direct Sequential Cosimulation 
Additional Co-DSS 
simulations 
1 
f| COSIMULATED | 
- TM-PAN | 
GSD=10m | 
(TM-PAN10) | 
Resampling 
10.000 simulated BI COSIMULATED | 
images : TM-PAN | 
GSD-30m 
(TM-PAN30) 
TM-PAN30 = TM? 
| 
No simulation | 
TM=TM-PAN30 | i 
> 1 simulation 
TM=TM-PAN 
i 
1 simulation 
TM=TM-PAN 
| 
| 
Version with maximum 2 
| local correlation is selected 
* TM-PAN vs TM 
PIXEL ACCEPTED 
| Local correction 
* 
    
  
FINAL 
M IMAGE 
fl LANDSAT-TM 
SPOT-P 
GSD-10m | 
Figure 2. General schema of the proposed method 
3. EXAMPLE 
3.1 Geographical localization 
To show the capabilities of the proposed method, a complete 
application example is shown. The selected zone covers a 
2400mx2400m area localized in the Jaén province (S of 
Spain), near of Jaén city. The area presents several land-uses 
oe olive trees, riverside vegetation, roads, etc.) (Figure 
897 
  
  
  
  
Alcalá la Real 
  
  
  
  
Figure 3. Localization map 
3.2 Images 
The data set used for this application is composed of a 
portion the following images: 
l. LandsatTM images. Scene: 20034/95. Date: 
08/26/1995. Image size: 80x80 pixels. GSD=30m 
(TM6 band has not been considered). 
2. SPOT-P image. Scene: 35-274/0-P. Date: 
06/01/1995. Image size: 240x240 pixels. 
GSD=10m. 
Both images were obtained on similar dates in order to 
ensure the merging process quality. In Figure 4a and Figure 
4b, SPOT-P and TM543 RGB composition is shown. 
3.3 Basic statistics and Correlation Matrix 
The basic statistics of the different bands and matrix 
correlation is presented in Table 1. 
  
  
  
Image Mean Std.Dev. Minimum Maximum 
TMI 99.10 15.00 66 166 
TM2 51.65 10.17 26 97 
TM3 67.37 14.66 28 131 
TM4 74. 99 14.37 34 133 
TMS 123.56 27.62 45 226 
TM7 66.67 16.77 22 139 
SPOT-P 140.58 25.74 63 254 
  
  
TM! TM2 TM3 TM4 IMS TM7 PAN 
  
TMI- 1.00 09% 090 034 085 081 083 
TM2 1.000 097 090 03838 087 0.83 
TM3 — 100 0901 089 0.90 0.82 
TM4 1.00 083 0.85 0.74 
TMS 1.00... 097 0.72 
TM7 1.00. 0.70 
PAN 1.00 
  
Table 1. Basic Statistics and Correlation matrix 
(PAN image is considered resampled to 30m pixel size)