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SPOT 5 APPLICATION VALORISATION PROGRAM CONCLUSIONS
F. Axes *, F. Baillarin*, H. de Boissezon b
^ Spot Image, 5 rue des Satellites - BP 4359 - F31030 Toulouse Cedex 4 — France — francoise.axes(@spotimage.fr
^ CNES, 18 avenue Edouard Belin — F31401 Toulouse Cedex 9 — France - helene.deboissezon(@cnes. fr
KEY WORDS: Performance, Application, Interpretation, Quality, User, Value-added, Decision support, Accuracy, Geometric
ABSTRACT: The SPOT program has been in operation for fifteen years, and is guaranteed to continue with the successful launch
and commissioning of SPOT 5 satellite in 2002. The data provided have successfully met all the quality standards required.
Thanks to its improved 5-metre and 2.5-metre resolution and wide imaging swath covering 60 km by 60 km or 60 km by 120 km in
twin-instrument mode, SPOT 5 holds the ideal balance between high resolution and wide-area coverage. It enlarges quite
extensively the scope of potential applications to be addressed by the
SPOT constellation.
CNES and Spot Image have launched in 2003 the SPOT 5 Application Valorisation Program (SAVP), aiming at testing and
performing evaluation studies of the SPOT 5 data by a limited number of key users worldwide for operational applications.
CNES and Spot Image propose a synthesis of the main results of
SAVP studies: medium-scale topographic mapping in Philippines,
cadastral mapping in Guatemala, land-use mapping for urban planning in Spain, improvement of census cartography in South
Africa, geological hazard identification and risk assessment for humanitarian aid in Nicaragua, boreal forest resources monitoring in
Sweden, agri-env
ironmental measures control in Germany, three-dimension visualisation products for flight simulation in France.
Finally, CNES and Spot Image make a statement of the performance of SPOT 5 imagery for the generation of the value-added
products, in terms of geometric accuracy and quality of the derived information.
1. INTRODUCTION
The SPOT 5 satellite was successfully launched by the Ariane
42P rocket on May 4", 2002. The commissioning of this new
sensor was pronounced on July 12^. 2002 and the data provided
since the launch has successfully met all the quality standards
required.
With SPOT 5, CNES and Spot Image offer to the world-wide
user community a unique tool The unrivaled imaging
capability of the SPOT satellite series is now combined to the
Very High ground resolution to allow the coverage of very
large geographic areas, in a short period of time, with very high
resolution/large scale imagery. Thanks to its improved 2.5-
metre and 5-metre resolution and wide imaging swath covering
60 km by 60 km or 60 km by 120 km in twin-instrument mode,
SPOT 5 enlarges quite extensively the scope of potential
applications to be addressed by the SPOT satellites.
In addition to several initiatives conducted to evaluate the
quality and information content of SPOT 5 imagery, CNES and
Spot Image have decided to confirm the potential of SPOT 5 for
applications through the SPOT 5 Application Valorization
Program (SAVP).
This program aimed at providing, to a very limited number of
selected key users world-wide, the possibility to test and
evaluate the SPOT data for operational applications. The
Principal Investigators were limited to a number of eight
worldwide, representative of the key SPOT 5 applications and
of various geographic conditions. They all had a sound
expertise in remote sensing, specifically in SPOT 1-4 imagery.
The PI selected have had access to a free SPOT 5 data set on a
site of their choice. They had to commit themselves to perform
an evaluation. study of this data set for their operational
application.
2. DESCRIPTION OF SPOT 5 APPLICATION
VALORIZATION PROGRAM
During the SPOT 5 in orbit performance assessment in 2002, a
number of thematic evaluations were performed using the very
first SPOT 5 images. They demonstrated that enhanced
resolution (2.5 m) combined to 60x60 km’ coverage,
multispectral information (including SWIR channel), and HRS
Digital Elevation Model constitute a significant advance from
thematic point of view.
All these technical characteristics render the SPOT system
particularly well suited for applications requiring geographical
information at medium-scale (1:25,000) such as cartography,
urban planning, natural disasters prevention, forestry.
2.1 Selected applications and teams
The SAVP was designed to go further into the applications
benefiting particularly from SPOT 5 enhancements.
The first SAVP domain is obviously Cartography and Land
Use/Land Cover mapping.
Results of in-orbit perfomance evaluation showed that SPOT 5
2.5m color products are well suitable for generating or updating
medium-scale cartographic databases, or for generating
topographic maps at scales of 1:50,000 up or 1:25,000. Other
related applications are LU/LC maps providing information on
peri-urban areas at scale 1:10,000. Such information is of great
interest for urban planning, monitoring of urban/rural fringe of
largecities, updating of census maps, etc. Four SAVP studies
have been selected in this thematic domain:
1. Topographic mapping at scale 1:25,000; stu
by PASCO corporation (Japan) on Manila site
(Philippines)
2. Cadastral mapping; study performed by UTJ-PROTIERRA
(Guatemala) on Izabal site (Guatemala)
3. Urban sprawl monitoring for urban planning; study
performed by Universitat politecnica de Catalunya (Spain)
on Barcelona site (Spain)
dy performed
