WORKING GROUP 3 
NAKANO 
151 
photographs. Delineated landform types should later be identified and named 
by a synthesis of morphological characteristics. 
Genesis and type of material will not necessarily have to be known for 
identification, but one should be careful in definitely naming each landform 
type. Genesis and materials of doubtful units should be particularly checked 
during the field investigation. 
As stated above, landform types will be grouped into landform series, asso 
ciations, sections, provinces and divisions by reducing the criteria for ident 
ifying the landform type. Such systematic grouping of morphological regions 
will also be carried out on aerial photographs. For this purpose it is recom 
mended that no magnification is used, because systematization should be done 
by broad observation. Conversely, it is practical to set up morphological 
regions from larger to smaller units. 
Application of analysis of landform type 
The Japanese Islands located on the Circum-Pacific Orogenic Zone have 
been subjected to tremendous crustal movements up to the present day. In 
other words, complicated features of landform reflect the geological and geo- 
morphological history. Therefore, analysing the micro-geomorphological fea 
tures, we can study many geological events. For example, geological structure 
is deduced from characteristic landform features on aerial photographs. That 
this is possible has been proved by photogeological studies. 
Pedological analysis of aerial photographs by Dr. P. Buringh proved the 
advantage of aerial photographic analysis of landform units. So far as we have 
experienced in Japan, this method will also be very instructive for Japanese 
soil scientists. In the soil survey of mountainous and hilly regions and diluvial 
upland regions particularly, it was recognized as a technique to be recom 
mended. It will also have to be applied to the soil survey of paddy fields. 
Although the paddy fields of Japan have been deformed artificially, we can 
trace the micro-geomorphological features of the alluvial plain on the aerial 
photographs by stereoscopic observation. 
Analysis of landform type has been applied to land classification for land 
use improvement. In this case, analysis of landform type is the basis of land 
classification survey, and the delineated landform types are translated to land 
units by combining landform, geology and soils data. 
The landform classification for flood prevention is also based on landform 
classification by means of aerial photo interpretation. We have applied the 
same ideas of landform classification to the population map on chorographic 
scale and have compiled a population density map by landform division. 
Conclusion 
a. Analysis of landform types will be very useful for understanding the char 
acteristic features of land surface.