geographical coverage 60x60 km? and to unchanged
multispectral richness including SWIR channel.
The key product seems to be the 2.5 m color orthoimage,
although the 2.5 m B&W and the 5m color orthoimages may be
enough according to the application.
The other major improvements are the absolute precision
location, and the HRS instrument, which open new perspectives
in the production of highly accurate digital elevation models
with 15 m horizontal accuracy and 10m vertical accuracy, and
orthorectified images with the same horizontal accuracy.
Spot 5 clearly appears as a wonderful tool for cartography and
cadastre on rural areas, allowing the production of geographic
information with a content and a geometric accuracy that are
compliant with 1: 25,000 topomap standards, and consistent
with the 1 : 10 000 scale geometry. Hundreds of thousands of
km2 can be covered within a short time and at a reasonable
price per km2, when compared with metric satellites.
For urban monitoring, planning and population census, the 2.5
m color images, allow urban change detection, urban structural
classification and even count of buildings or identification of
isolated settlements, at 1 : 10 000 scale. The natural color
products seems of very high interest for communication
purposes, and the 60 km swath is a strong asset for big
metropolitan areas.
In risks and disasters mapping services, the 2.5 m resolution is
again a decisive advantage, more particularly on urban areas,
resulting in a very strong demand for constitution of an archive
of Spot-5 2.5m color images on the major urban areas with
potential risk. Such archive would be of highest interest in case
of crisis as it would give a 1:10.000 map of status "before
crisis”.
For agriculture and forestry, the SWIR band and the 2.5 m
resolution combined with the geographical coverage, together
with the high programming capabilities, are the main assets of
SPOT 5 images. It is now possible to count individual fruit
trees, to identify precisely agricultural fields boundaries. Crop
monitoring and agricultural statistics are improved in a smaller
parcel environment with the multispectral information at 10 m
rsolution. A few concrete examples of benefits in forestry is a
precise identification of forest stands, the characterization of
regenerated areas, the estimation of the density of seed trees,
etc... through SWIR analysis at 10 m and 2.5 m.
For 3D-visualization applications, the main asset of SPOT 5
consist in the provision at low cost of different layers of
natural-colour orthoimages at resolutions of 10 metres, 5 metres
and 2.5 metres, coregistered and centred on an airport. The
Reference3D product, very-high-quality DEM issued from the
SPOT 5 HRS instrument, is another major advantage of this
multi-resolution orthoimages offering. Indeed, flight simulation
gets real with SPOT 5.
5. ACKNOWLEDGEMENTS
Spot Image and CNES thank the eight investigators for their
active and useful participation to this SAVP.
REFERENCES
Lasselin, D., Sempere, J.P., Cantou , J.Ph., 2003. Evaluation of
the geographic information potential of SPOT 5. Proceedings of
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B1. Istanbul 2004
IGARSS 2003. IEEE International Geoscience and Remote
Sensing symposium.
Galaup, M., and Dupuy, S., 2003. Benefits of SPOT 5 imagery
for town planning with new adapted processing techniques.
Proceedings of IGARSS 2003. IEEE International Geoscience
and Remote Sensing symposium.
Clandillon, S., Yesou, H., and Meyer, C., 2003. Benefits of
SPOT 5 HR and VHR data for forest management and windfall
damage mapping. Proceedings of IGARSS 2003. IEEE
International Geoscience and Remote Sensing symposium..
Forsgren, J., 2003. Test of the use of SPOT 5 multispectral
super mode data in parcel area estimation. Proceedings of the
9th Annual Conference on Control with Remote Sensing of
Area-based Subsidies, 27-28th of November, 2003 - Maritim
Hotel, Koln, Germany.
Kakiuchi, H., Onaka, M., Asai, M., and Itoh, F., 2004.
Topographic mapping at scale of 1:25,000 using SPOT 5
satellite imagery. ISPRS 2004, Istanbul, Turkey.
Corlazzoli, M., and Fernandez, O.L., 2004. SPOT 5 cadastral
validation project in Izabal, Guatemala. /SPRS 2004, Istanbul,
Turkey.
Roca, J., Burns, M. C., and Carreras, J. M., 2004. Monitoring
urban sprawl around Barcelona's metropolitan area with the aid
of satellite imagery. /SPRS 2004, Istanbul, Turkey.
Ferreira, F., 2004. Using SPOT 5 to improve census
cartography. /SPRS 2004, Istanbul, Turkey.
Retiére, A., Senegas, O., Parriaux, A., Haeberlin, Y., and
Turberg, P., 2004. Validation of SPOT 5 satellite imagery for
geological hazard identification and risk assessment for
landslides, mud- and debris flows in Matagalpa, Nicaragua.
ISPRS 2004, Istanbul, Turkey..
Rosengren, M. G., and Willén, E., 2004. Multiresolution SPOT
5 data for boreal forest monitoring. /SPRS 2004, Istanbul,
Turkey.
Baruth, B., Aastrand, P., de Roeck, E., and Leo, O., 2004.
Investigations on the use of remote sensing data to control area
based agri-environmental measures over a test site in southern
Germany. /SPRS 2004, Istanbul, Turkey.
Hernoust, F., and Cancés, M., 2004. Evaluation of SPOT 5 data
for flight simulation applications. /SPRS 2004, Istanbul, Turkey.
Boissin, B., Goudy, P., and Bernard, M., 2003. SPOT 5 in-orbit
performance and applications. Proceedings of International
Astronautical Federation Conference 2003, Bremen, Germany.
Yésou, H., Clandillon, S., Allenbach, B., Bestault, C., De
Fraipont, P., Inglada, J., Favard, J.C. A constellation of
advantages with SPOT SWIR and VHR SPOT 5 data for flood
extent mapping during the September 2002 Gard event
(France). Proceedings of IGARSS 2003, IEEE International
Geoscience and Remote Sensing symposium.
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