AN APPROACH FOR ANOMALIES SEARCH FOR PEDOLOGICAL CARTOGRAPHY 
USING REMOTE SENSING CASE OF THE REGION OF KSAR SBAHI AND BERRICHE 
(OUM EL BOUAGHI - ALGERIA) 
T. Mostephaoui ' 
* CNTS, National Center of Spatial Technology, Laboratory of remote sensing, 1 avenue de la Palestine BP 13, 
ARZEW (ORAN) ALGERIA.- mostewfik@hotmail.com. 
Commission VII, WG VIL/1 
KEY WORDS: An approach, exo-atmospheric, Cartographying, Multispectral classification algorithms, likelyhood, 
minimum distance, parallelipepedic, mahalanobis. 
ABSTRACT: 
The hand ling of exo-atmospheric TM bidate (march and September 1989) reflectance data was used for cartographying the land, 
using multispectral classification algorithms of the type supervised (Likelihood; minimum distance; parallelipepedic; Mahalanobis; 
et SAM " Spectral Angle Mapper “). The application concerns the region of ksar sbahi and berriche belonging to the semi arid 
bioclimatic level and is aimed to compare the classification results to the existing pedological map ( established using traditional 
methods), by designing an approach. We are interested solely to the differences between the two documents and we shall call 
anomaly any information which can not finda plausible thematic interpretation. 
The results obtained are promising and allowed us to surround the possible confusions about land spectral signatures. 
These anomalies are in general linteed with the leveling conditions of the objects and their interaction with vegetation. 
1. INTRODUCTION confrontation of the classifications results applied in 
these regions to the pedological existing map (established 
with traditional methods by the | BNEDER, 1994) 
(Figure 3 ) We are interested solely curiously to the 
differences between these « 02 documents» and we will 
call «anomaly» any information which does not find a 
thematic plausible interpretation (figure 4). 
The great advantage of having data available digitally is 
that it can be processed by computer either for machine 
assisted information extraction or for embellishment 
before an image product is formed. The latter is used to 
assist the role of photointerpretation (J. A. Richards, 
1993) and classifications the application concerns the 
region of KSAR SBAHI and BERRICHE (Figurel). 
Alger 
° 
Oran Constantine 
x Ghardais y 
T 
Cni ALGERIE 
gi Tamawrasset ) 
N vr 
x Hs 
M ut ! 
Figure 1. Geographic situation of the site survey 
d'Oum el bouaghi 
  
    
2. METHODOLOGY 
The first part of this study is oriented toward the 
manipulation of radiance and/ or planetary reflectances 
for each pixel, in order to cartography soils through 
multispectral supervised classifications algorithms 
uno LANDSAT TM data Pit igh spatial resolufion color. Pixels from these were used to generate the signatures in table on 
(30 x 30 m) and spectral (7 channels), September and — ,, image of September 1909. 
March 1989. The application concerns the region of This approach has a key objective the examination of 
KSAR SBAHI BERRICHE (Figure 2) and aims to the «remote sensing object» in order to analyze the synthetic 
  
Figure 2. Image to be classified, consisting of a mixture of natural 
vegetation, waterways urban. 15 training regions are identified in solid 
100 
International 
ICI HUE 
character o! 
conditions, 
target. This 
«strength» ¢ 
constitute a 
to the objec 
time and it 
back to unv 
  
Vos Sum 4 
Figure 3. F 
Figur 
The pow 
understand 
signatures