from Method 3
ncy numbers,
y factors were computed
inates, GPS coordinates
3 show the reliability
] GPS coordinates of
is.
[mage Coordinates
internal
Y xy
4 0.54 | 0.23 0.39
1573" T 0:06*6.61
| 3,093 4 3.95 521
3PS Coordinates of
IS
X Y 7,
0.74 0.85 0.82
4.66 4.34 442
2.37 1.67. 1.85
i» 80; <4.0), acceptable
(0.04 € r; « 0.1,
(ri € 0.04,
/alues for the reliability
bad
icceptable
thod 2 which imply that
rolled strip triangulation
oordinates especially the
observations.
| data have convinced us
ita. The results from the
e of writing this paper.
he conference.
5. CONCLUSIONS
GPS controlled strip triangulation was carried using geometric
constraints of man-made structures (power towers) to replace
the ground control points needed to recover the roll angle of the
camera. The results obtained from the simulated data show that
if kinematic GPS can provide decimeter accuracy for the
camera exposure stations, then the strip adjustment can be done
without any ground control points as long as the datum
transformation is known. Normally, two or three strips of
photography are taken to recover the roll angle of the aircraft
and to increase the geometry of a single strip. This new
technique for single strip adjustment eliminates the need for
multiple strips of photography and reduces both the time and
the cost of the mapping project.
6. REFERENCES
Ackermann, F., 1992. Kinematic GPS Control for
Photogrammetry. Photogrammetric Record, Vol. 14, No. 80,
pp. 261-276.
Alobaida, A., 1993. Design and Simulation of a Real-Time
Mapping Satellite for the Kingdom of Saudi Arabia. Ph.D.
Dissertation, Department of Geodetic Science and Surveying,
The Ohio State University, U.S.A.
Cannon, M.E., 1990. High Accuracy GPS Semi-Kinematic
Positioning: Modeling and Results. Navigation 37(1).
Colomina, L, 1993. A Note on the Analysis of Aerial
Triangulation with GPS Aerial Control. Photogrammetric
Engineering and Remote Sensing, Vol. 59, No. 11, pp. 1619-
1624.
Deren, L., and Jie, S., 1989. Quality Analysis of Bundle Block
Adjustment with Navigation Data. Photogrammetric
Engineering and Remote Sensing, Vol. 55, No. 12, pp. 1743-
1746.
Ebadi, H., and Chapman, M.A., 1995. An Experience on GPS
Assisted Aerotriangulation. In: Proceedings of the 7th
International Conference on Geomatics, Ottawa, Canada.
Forstner, W., 1985. The Reliability of Block Triangulation.
Photogrammetric Engineering and Remote Sensing. Vol. 51,
pp. 1137-1149.
FrieB, P. 1991. GPS Supported Aerial Triangulation,
Empirical Results. In: Proceedings of the 2nd International
Workshop on High Precision Navigation, Dummler, Verlag,
Bonn, Germany, pp. 7-18.
Lachapelle, G., Cannon, M.E., and Lu, G., 1992. High
Precision GPS Navigation with Emphasis on Carrier Phase
Ambiguity Resolution. Marine Geodesy, Vol. 15, pp. 253-269.
Lapine, L., 1990. Analytical Calibration of the Airborne
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B3. Vienna 1996
Photogrammetric System Using A Priori Knowledge of the
Exposure Station Obtained from Global Positioning System
Technique. Ph.D. Dissertation, Department of Geodetic Science
and Surveying, The Ohio State University, Publication No.
9111738, Ann Arbor, MI 48109, U.S.A.
157