004
2st
en
en
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B7. Istanbul 2004
0.15
0.1
Position Closure (M)
0.05
Point Number
8 9; 10
Figure 13. Comparisons of position misclosure between
applying RTK and applying TS.
Table 1.
Statistics of accuracy comparisons (in units of mm)
between applying RTK and applying TS.
fo RTK TS
zh VP f f f. P
Max. 21 14 21 l 154 229
Min. -2 -18 -224 -56 30
Mean 6 -4 14 -130 78 163
o 8 11 4 64 61 63
Table 2. Performance comparisons between applying RTK and
applying TS.
Surveying Point Required Required
Method Accuracy Man- Observation
Power Time per Site
RTK 14mm + 4mm | man 0.5 — 2.5 minutes
TS 163mm + 63mm | 3 men or 4 — 8 minutes
more
307
5. CONCLUSION
According to the test results introduced in section 4, some
remarks can be concluded: (1) RTK is one of the best choices
to collect coordinates of the land use change region. However,
in cases of signal blockages, such as in urban area, RTK needs
to be aided by TS. (2) The position misclosures achieved by
applying RTK and by applying TS are l4mm t 4mm and
163mm + 63mm respectuvely. (3) Each land parcel corresponds
to a polygon from the point view of GIS. And, the land use
change styles of the interested region can be analysed
beforehand usning the concepts introduced in section 3. Then,
the point amounts required to be surveyed can be determined
based on the land use change style analysis.
ACKNOWLEDGEMENTS
The work presented in this paper was funded, in part, by
National Science Council, Taiwan, Republic of China. The
Project Number is NSC 92-2415-H-004-025.
REFERENCES
Lin, L.S., 2003. Integrating of GPS RTK and Total Station for
Land Surveying of Urban Region. In: The 1% Taipei
International Conference on Digital Earth, Chinese Cultural
University, Taipei, Taiwan, November 18-19, 2003, No. C1-12,
ppl-10.
Wolf, P.R. & Ghilani, C.D., 2002. Elementary Surveying — An
Introduction fo Geomatics. Prentice Hall, Upper Saddle River,
New Jersey, pp. 364-366.
