Table 1 
Comparative Classification Schemes 
Photogeological Map 
1:100,000 
ERTS-interpretation 
1:250, 000 
11. Quaternary 
7. Quaternary 
10. Tertiary 
6. Tertiary 
9. Upper Cretaceous 
5. Upper Cretaceous 
8. Albian 
7. Aptian 
6. Infra Aptian 
4. Lower Cretaceous 
5. Jurassic 
3. Jurassic 
4. Upper Trias sic 
3. Middle Trias sic 
2. Lower Triassic 
2. Triassic 
1. Paleozoic 
1. Paleozoic 
CONCLUDING REMARKS 
It is evident that limitations in image resolution have reduced both the number 
and the quality of some of the recognition elements needed for correct identification 
and delineation of geological features. 
More specifically, insufficient resolution results in fragmentation, coalescence, 
and disappearance of details in patterns and textures, which elements are essential 
to proper recognition of rock types. Consequently, correct identification is ham 
pered especially in the following cases: 
1. when geological units are of small sizes, 
2. when different units have similar or near-similar spectral characteristics, 
so that visual separation of their image-densities becomes difficult, 
3. when different units have near-similar morphological expressions, 
4. when different units show similar patterns or textures. 
In all such cases it becomes difficult to find unique identifiers for type discrimina 
tion since the number of recognition factors is reduced.