, 2012
nal at every
to receive a
ry seconds).
ill courses ,
ed in some
y, LEX was
archer in the
10t received ,
| receive at
MICHIBIKI
geospatial
servation of
n station in
ose of the
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B4, 2012
XXII ISPRS Congress, 25 August — 01 September 2012, Melbourne, Australia
experiment is to confirm reduction of survey time and influence
of multipath near the building and Figurell shows the
relationship between surveying time and accuracy.
Investigation of the time interval was changed from 30 seconds
to 300 seconds, for example, 1-30s and 2-30s in Figurell
shows 30 second surveying of Ist experiment data and 2nd
experiment data respectively .
As the results, almost all same value was shown even if
observed time was short, it turned out that an exact value is
shown.
0.20 # 1-30s
Ed 0.10 Boe
: & 1-180s
C 0.00 X 1-300s
740.500 0.000 0.500 x2-30s
0.10 ® 2-60s
-0.20 * 2-180s
Y(m) »2-300s
Figure 11. Observation results of LEX signal (Fixed Point)
Fixed-position experiments for LEX signal of
QZSS(MICHIBIKI) was success. However we have to conduct
detail analysis of an experimental result after this. After
submitting this paper, the 2nd demonstrated experiment will
carry out. In an experiment, the place which cannot receive a
LEX signal is due to attach a camera to a car and to be
pinpointed. Detail of analysis will show at the conference
presentation.
7. CONCLUSION
Establishment of NSDI gave us to chance to promote of
advanced geospatial information society, and an experiment
was conducted by using passive and active RFID. Chapter 3
shows seamless positioning was conducted by GPS and passive
RFID. As a result, it is possible to do indoor positioning by
setting passive RFID. Thus, combination of GPS and passive
RFID is useful tool for seamless positioning. However, the part
where tracks of the GPS overlapped with tracks of the RFID
existed. The number of tag should be decrease to use this
principle in a social experiment. Therefore, it was necessary to
investigate method to minimize the track of GPS and RFID
overlapping to minimize time and labor. The solution of the
problem is to use QZSS. It is expected to obtain high accuracy
position information around the building, and the problem may
solve by QZSS. Then seamless positioning from indoor to
outdoor will be able to do accurately by a collaboration of
geoinfomatics technology.
A chapter 4 shows experiment was conducted by Active RFID
to obtain indoor position. As a result, it cannot obtain the exact
location by using active RFID only. Therefore we consider
obtaining more accurate position information by using both of
active RFID and passive sensors. Verification experiment was
performed whether a passive sensor detected examinee on any
position in a room. As an analysis, sensor's detection area was
within a 1m radius regardless of walk speed. Thus, combination
of active RFID and passive sensor is better than that of single
use. It is possible to obtain high accuracy indoor position, and it
will reduce the cost of the system using the method suggested
by us.
47
A chapter 5 described first demonstrated experiments of
QZSS(MICHIBIKI) at the Hokuriku area in the Japan and
two experiments showed the useful experimental result. The
LEX signal has been received at least not less than 80 km/h and
even if observed time was short, it was able to take exact data .
We are going to continue the experiment of
QZSS(MICHIBIKI) in the future.
We hope to achieve advanced spatial information society which
can easily obtain indoor and outdoor position anytime and
anywhere using GNSS and RFID as shown in the Figure 12 in
near future.
GNSS
Satellite
Active Reader
Yasha Tag GE
Figure 12. Concept of Seamless positioning experiment
REFERENCES
Masaaki, S., 2009. APPLICATION OF REAL TIME GIS,
REMOTE SENSING AND IC TAG FOR REALIZATION OF
GEOSPATIAL INFORMATION SOCIETY, Geoscience and
Remote Sensing, In-tech, pp. 153-180.
Fernando. S., 2010. Improving RFID-Based Indoor Position
Accuracy Using Gaussian Processes. Indoor Position and
Indoor Navigation, Zürich, Switzerland.
Mitoshi, M., 2008. Map renewal technique for Local
Government by using REAL TIME GIS, GPS and Remote
Sensing. In: The International Archives of the Photogrammetry,
Remote Sensing and Spatial Information Sciences, Beijing,
China, Vol. XXXVII. Part B4, pp.893-898.
Sota, S., 2008. AVAILABILITY OF REAL TIME GIS AND IC
TAG FORREALIZATION OF UNIVERSAL MAP. In: The
International Archives of the Photogrammetry, Remote Sensing
and Spatial Information Sciences, Beijing, China, Vol. XXXVII.
Part B4, pp.899-904.
Tatsuo, A., 2007. Universal Map for Spatial Information
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In: International Geoscience and Remote Sensing Symposium,
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S. Takeuchi and M.Shikada, APPROACH OF THE INDOOR
AND OUTDOOR SEAMLESS POSITIONING BY USING
RFID AND GNSS; Mobile Mapping Technology
MMT2011;Proceedings,(CD-ROM);2011
ACKNOWLEDGEMENTS
The authors wish to special thanks to Mr.Manabu Tsuchiya,
Mr.Naoki Shirai and MrSota Shimano of KOKUSAI
KOUGYO Co. LTD. which offered much suggestion.
Moreover, we would like to express our heartfelt gratitude to
the cooperation of Mr.Kensuke Taira of KYUSYU TEN Co.,
Ltd., which supplied active RFID and information. Finally, we
would like to express special thanks to Mr. Matsuoka of
SPAC who supported the QZSS experiment of Hokokuku area.
