In: Wagner W., Székely, B. (eds.): ISPRS TC VII Symposium - 100 Years ISPRS, Vienna, Austria, July 5-7, 2010, IAPRS, Vol. XXXVIII, Part 7B 
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covered with soil and grassed after the demolition of buildings. 
A contemporary orthophoto shows trees, scrub and herbaceous 
vegetation associations in this area. What points to one-time 
mining activities in this area are the foundations of old mining 
buildings that are visible in the orthophoto from 2003 (Figure 
9). 
Figure 9. Area of the CSA (a) in an aerial photo from 1971 (© 
MO CR/GeoSI ACR) and (b) in an aerial photo from 
2003 
2.2.2 Dry tailings ponds: These are shallow concave 
vegetation-free landforms that appear in the landscape after the 
termination of sludge management activities (Figure 11). Filled 
tailings ponds dry out and if no reclamation is carried out, they 
gradually overgrow with self-seeded vegetation. 
Figure 11. Dry tailings ponds (a) in an aerial photo from 1947 
(© MO CR/GeoSI ACR) and (b) in an aerial photo 
from 2003 
2.2 Secondary displays 
Hard coal deep mining has also secondary displays in the 
landscape which are characterized by the occurrence of 
anthropogenic landforms indirectly related to mining 
(reclamation areas, dry tailings ponds, communications) or land 
cover change (vegetation-free surfaces). 
2.2.1 Reclamation areas: It concerns temporary convex 
landforms in a shape of low flat waste banks. These should be 
aligned with the surrounding landscape after the termination of 
reclamation works. Reclamation areas are created in order to 
deal with negative effects of hard coal deep mining. The photos 
facilitate easy interpretation of new reclamation areas in the 
form of bare surfaces (Figure 10). 
Figure 10. Reclamation areas in an aerial photo from 2003 
2.2.3 Communication landforms: In the case of 
undermined area embankments are created to level surface 
deformations damaging communications. As a result of the 
modification of communication height embankments reaching 
up to a few meters are built. The types of embankments, which 
are characterized by line shapes and therefore easily identifiable 
in aerial photos, involve railway and road embankments as well 
as embankments of engineering networks (Figure 12). 
2.2.4 Vegetation-free surfaces: Vegetation-free surfaces 
that represent secondary displays of deep mining are most often 
related to bare surfaces appearing particularly after building 
demolition (Figure 13). Their duration is relatively short as they 
gradually overgrow with self-seeded vegetation.