6. CONCLUSION 
In this paper, it is visually and quantitatively verified 
that the forest deterioration has a strong relationship 
with topographical conditions. The results are as 
follows: (1) deterioration areas tend to concentrate near 
the mountaintop, and to stretch along the ridges.; (2) 
deterioration areas concentrate in the high elevation 
area and are found on gentle slopes, facing south 
direction. 
  
This paper also attempts to use the Geographical | 
Information technologies , such as GIS, GPS, and | KE) 
DEM, to improve the efficiency of works and to 
evaluate the results quantitatively and visually . 
  
  
These results obtained in this paper will help further ABS 
investigations to clarify the causes of the forest | 
deterioration. Rece 
Prim 
REFERENCES 
LAN 
Hasegawa, J. 1989. Frost mass killing of Betula reas 
ermanii in Mt. Shirane, Nikko. Japanese creatures. 
3(3), pp.25-28. (in Japanese) we u 
. . ri: not C 
Nogami, M. 1995. Geomorphometry for detailed digital 
elevation model. Geographical Review of Japan, 68A(7), | 
pp.465-474. (in Japanese with English abstract) | 
Tanimoto, T., Liu, Y., Satomichi, T., Ohkubo, T. and 
Nihei K. 1996. Forests damage and its environmental 
condition in the Okunikko, Ashio, and Akagi 
mountainous region, northern Kanto district, central disar 
Japan. Forest Environment, 38(1), pp.1-12. (in defoi 
Japanese with English abstract) 
unkn 
with 
chan 
used 
curre 
prep: 
for 
moni 
pape 
S 
718 Intemational Archives of Photogrammetry and Remote Sensing. Vol. XXXII, Part 7, Budapest, 1998