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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B1. Istanbul 2004
Kartsten Jacobsen (Jacobsen, 2004), as Peter Reinartz, has
compared DEM accuracies on open areas and forest areas.
The use of a specific software to take into account
forest/urban areas can improve the overall accuracy.
As expected, most of investigators have identified worse
results in mountainous areas and Karsten Jacobsen has
evaluated the slope effect: he proposes that height accuracy
could be given by a linear formula:
oH= a + b.p where a and b are accuracy parameters and p the
terrain slope (tan(a))
a= 3.5 m to 5 m and b- 1.6 m to 23.2 m (depending of the
landscape)
13. CONCLUSION
The HRS SAP program has already confirmed the high
quality of the HRS instrument on board of Spot 5.
Unfortunately it is too early to give a complete overview of
the program as only half of the expected results have been
delivered at this stage (mid-April 2004). Nevertheless, the
DEM/DSM accuracy derived from HRS has been assessed
around 5m (relative) / 10-15 m (absolute).
Current results show that even without GCPs good results
could be obtained from HRS, due to the quality of the
ancillary data. As expected better results are obtained on flat
areas, without forest or urban features. This has been
identified and measured on the Bavarian test site.
There is still more work to do, comparing results according to
other types of landscape (if results on Africa, Asia, Australia
are provided), other orientation or matching methods. This
should lead to interesting exchanges between investigators
(most of them have worked alone up to now)
With the authorization of the investigators data and results of
this HRS-SAP initiative should be available on the ISPRS
web site after this Congress.
REFERENCES:
Airault, S, 2003, Reference3D accuracy and quality process:
First assessment and perspectives. ISPRS Workshop Oct.
2003, Hanover
Airault S., 2004, Contribution of HRS data to the constitution
of a high accuracy DTM; ISPRS Congress Istanbul 2004
Baudoin, A., 1999, The current and future SPOT program.
ISPRS Workshop Hanover 1999
Baudoin A., 2004, Beyond Spot 5: Pléiades, part of the
French-Italian program ORFEO; ISPRS Congress Istanbul
2004
Bernard, M, 2001, Instrument HRS et MNT sur Spot 5,
Bulletin SFPT 164 p32-34
Bernard M., 2004, HRS : An original Partnership & a
tremendously valuable archive, ISPRS Congress Istanbul
2004
Bouillon, A. 2003, SPOT 5 Geometric Image Quality,
IGARSS 2003, Toulouse
Bouillon, A. 2004, SPOT 5 HRS location performance tuning
and monitoring principles, ISPRS Congress, Istanbul 2004
Breton, E. 2002, Pre-flight and in-flight geometric
calibration of SPOTS HRG and HRS images. ISPRS
Symposium Nov. 2002, Denver
Chelakin V., Fomtchenko M., 2004, Comparative
characteristics of DEM obtained from satellite images SPOT-
5 and TK-350, ISPRS Congress Istanbul 2004
Dowman L, Michalis P., 2004, The application of a new
sensor model and DEM generation to SPOT HRS Data;
ISPRS Congress Istanbul 2004
Eremeev K., Chelakin V., Semenenko A., Aksenov A., 2004,
“StereoScan” is the Photogrammetric system for scanner
satellite images processing. ISPRS Congress Istanbul 2004
Ewiak IL, Kaczynski R., 2004, Accuracy of DTM Generated
from SPOT-4 and SPOT-5 HRS data, ISPRS Congress
Istanbul 2004
Fra Paleo U., Miranda D., Llamazares J., Crecente R., 2004,
DEM Extraction and Accuracy from Stratified Stereo SPOT
5 Images; ISPRS Congress Istanbul 2004
Fratter, C., 2001, The Spot 5 mission, 52" International
Astronautical Congress, Toulouse, 1-5 Oct. 2001
Fraser C., Dare P., 2004, Digital surfacing modelling from
SPOT 5 HRS imagery using the affine projective model
ISPRS Congress Istanbul 2004
Ghayourmanesh S., Zhang Y., 2004, SPOTS HRS Study,
Automatic DTM Extraction, Regions 1 (Montmirail - France)
and 7 (Rasht - Iran); ISPRS Congress Istanbul 2004
Gleyzes, J.P., SPOT 5: System overview and image ground
segment, IGARSS 2003 Toulouse
Habib A., Kim E., Morgan M., Couloigner I., 2004 DEM
Generation from High Resolution Satellite Imagery Using
Parallel Projection Model, ISPRS Congress Istanbul 2004
Jacobsen K., 2004, DEM generation by SPOT HRS, ISPRS
Congress Istanbul 2004
Kianifar F.,Abootalebi A., Eslamirad A., Hashemian M.,
2004, Accuracy Evaluation of DEM Extracted From SPOT 5
HRS Imageries. ISPRS Congress Istanbul 2004
Kornus W., 2004, Assessment of DEM Accuracy Derived
From SPOT 5 High Resolution Stereoscopic Imagery, ISPRS
Congress Istanbul 2004
Lasselin, D., 2003, Evaluation of the geographic information
potential of Spot 5, IGARSS 2003, Toulouse
Nandakumar R., Amitabh, Alurkar M., Krishna B.,
Srivastava P., 2004, SPOT-5 HRS along-track stereo data
evaluation over Montmirail and Melbourne Test Sites; ISPRS
Congress Istanbul 2004