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Proceedings, XXth congress

International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B-YF. Istanbul 2004
Slips may occur because of the decrease of the sector resistance
by one or more surface. This surface can be seen or predicted.
Slips are separated two classes according to the mechanical
properties. In the first one; there is no big changing on the
moving mass. This group is called as rotating slips. Collapsing
of the surfaces are the main kinds of rotating slips. In the second
one; there are big changing on the moving mass or arise by to
many small pieces. Sliding of the rocks and trashes are the main
kinds of the second one.
Volcanic eruptions and big rock landslides are mainly include
dry pieces. These flows called as flows of rock pieces. Moist
flows mostly occur in riverbeds and follow it. Rain dose affects
these types of flows. Solid matters (soil, rocks, stones, trees,
branches, bushes) constitute the 60-70 95 of the weight. They
stop by leaving their load to a leaning valley or floor of a
Complex Landslides
Most landslides display different movements during their
progress. Then most landslides are complex. Complex
landslides can be classified because they indicate the main
characteristic type. Controlling the landslides and determining
the most useful knowledge to protection form the landslides are
the main reasons for classifying. (Atalay and Bekaroglu, 1973)
Sebinkarahisar is a township belongs to Giresun province. The
centre of township is 38? 25' N and 40° 17° E. The settlement is
on the valley between Meryem Mountain (2008m) and Kale
Hill (1568m). The altitude of the township is 1350m. There are
too many streams and little lakes located in the region.
Climate of the study area shows warmth and terrestrial
characteristics, Anatolian climate is dominant. On the other
hand; a crossing climate to Black Sea climate is dominant about
evaporation, moisture and raining conditions. Approximate
yearly temperature is 8,9"C and amount of rain is 572,2 mm.
The main wind direction is north-east and second one is south-
On the north side of the township there are half-moisture and
dry but spoiled forests with xerophyte. The other areas are
covered by bushes and grassy places. However, there are some
tree groups on the south side. (fbe.ktu.edu.tr)
As seen in figure 1, 1/25000 scaled standard topographic map
(H40b3) of the region is geographically referenced by
calculating and entering the Hayford-50 coordinates of the
intersection points of the coordinate network (148 points).
Contours, settlements, grassy places, lakes and roads are
digitised as blocks by the Topol software.
Because Topol software does not support third dimension,
contours are exported in dxf format and in AutoCad software
the third dimensions, height information, are entered.
Settlements, grassy places, lakes and roads, also exported in dxf
format and by QuickSurf module of AutoCad software their
height information is processed. QuickSurf module uses
extrapolation method.

Figure 1. Standard Topographic Map
The standard geological.map (H40b3) (figure 2) of the region is
scanned as six parts. All parts separately geographically
referenced by calculating and entering the Hayford-50
coordinate of the intersection points of the coordinate network.
These parts are combined by Topol software. 5 different
geological formations of the region digitised as blocks by Topol
software. These are:
= Qa : Alluvium,
= Te: Andesite Basalt,
" Tk: Conglomerate, Sandystone, Siltstone, Mudstone,
= Ty : Tufa, Sandy Limestone, Conglomerate, Basal,
Andesite, Aglomerate,
= Krf: Morn, Micritic Limesstone, Andesite, Basalt,
Sandystone, Aglomerate, Tufa
All digitised blocks are used as different layers and entered to
ArcView software.

Figure 2. Standard Geological Map