re
is
ch
on
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er
od
ite
In this paper we introduced the GIS, so as to increase
the efficiency, by minimizing the time damage and
economical damage of abstraction method of data for road
design by existing manual work. We tried, so that the
establishment of database in this system with the DTM and
the basic data for design and the analysis of this data may
be utilized for calculating the data for road design
automatically. About the data for execution design, we
inputted by making out the map of scale 1:1200 for the
area of about 50m-150m from the central line of plan
design. About 1 bridge out of plan section, we limited the
curve diameter of plane alignment
—
X 324700
324600
X 324500
| 924400
X 324300
X 324200
X 324100
384000
X 323900
=
X 323800
M 323700
[y 235000
€
[y 235204
Y 23530
[Y 235404
cnt
[Y 235604
Figure 7. TIN of object area
at the both ends of bridge to 200m or more. And, at the
starting point of construction, the relative ground height is
high by the given condition of topography and the specialty
of pedestrian bridge of expressway. So, in this paper we
planned the profile slope by limiting to maximum 6%. From
the profile drawing and cross-section drawing, we calculated
the data of the slope-changing point in the data of 20m
interval and the data of DTM data basically simultaneously.
In this study, we decided 3 units of plane alignment at
the object area, and 2 units of profile alignment from each
plane alignment. And, we calculated execution design data by
chooseing 1 line out of each alignement. We outputted the
profile drawing and cross-section drawing about the line
which was chosen finally. And, the total earthwork volume
Was +21,573,748 m?, and the baking volume was 8,222,278
m°, and the cutting volume was 29,796,026 m® at he
chosen line. About the mesurement result of site which is
435
70.00
Figure 8. Alignment at digital map
necessary for construction, we outputted indicating the site
border etc. after overlapping cadastral map on the digital
topographical map.
5. CONCLUSION
This paper examined the applicability by establishing the
photography system by 35mm camera and the small size
airplane of radio-contro| and analyzing the accuracy of
topographical data photographed with this system. In
addition, as the result to have try to apply this to the
acquisition of data for the real route design of small area,
we could obtain the following conclusion.
(1) Developed photography system may take off and land
at the object area that the gepgraphic information is
demanded directly So, we could obtain the geographic
information of large scale which is demanded at the time of
development plan of small area effectively.
(2) As the result to have introduced GPS technique to the
point positioning of GCP, we could obtain the RMSE of
XYZ coordinates as about 5mm, 5mm and 12mm,
respectively. So, it could be seen that the introduction of
; GPS technique to the measurement of GCP is efficient.
(3) From the photo photographed at the flight height
300m, the acqusition of design data such as profile and
cross-section and earthwork volume etc. about the newly
established road was possible by making out the
topographical map and DTM and utilizing the GIS. So, it will
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B4. Vienna 1996
