A FIRST GLOBAL SPOT MOSAIC OF FRENCH GUIANA IN THE FRAMEWORK OF KYOTO PROTOCOL BY DIRECT RECEIVING STATION SEAS-GUYANE FACILITY

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1 PLENARY SESSION: Global Forest Monitoring and International reporting, paper 154 A FIRST GLOBAL SPOT MOSAIC OF FRENCH GUIANA IN THE FRAMEWORK OF KYOTO PROTOCOL BY DIRECT RECEIVING STATION SEAS-GUYANE FACILITY Michel Petit, Jean-François Faure, Jean-François Girres, Kenji Ose, Laurent Durieux, Christina Corbane, Frédéric Huynh, Dominique Lasselin, Michel Deshayes & Nicolas Stach Contacts: Laurent. & Michel.PETIT@ird.fr

for a sustainable management of renewable resources and environment

2 Survey of Environnement Assisted by Satellites : From receiving stations net to the concept of «precision ecology» Earth observation for a sustainable management of renewable resources and environment observatories by space system in a net true engineering for ecological systems

3 SeaSNET 2008 Islas Canarias, 1996 Isla Reunion, 1990 Guyana Francesa, 1998 Nueva Caledonia,1997 Polinesia francesa, 2004

4 de l l par S SAE urveillance nvironnement ssistée atellite

Project SEAS Guyane Survey of Environment

Technologic platform for acquisition and

data (SPOT et ENVISAT) Observatory of the

5 Project SEAS Guyane Survey of Environment Assisted by Satellites Double Definition Technologic platform for acquisition and processing of High resolution satellites data (SPOT et ENVISAT) Observatory of the environment for research, training and sustainable development in Guyana, Amazonia and Caraïbes Project chief : Michel.PETIT@ird.fr

6 Multiple partners project, arrangements public/private original and innovative P O R T E U R I N D U S T R I E L B A I L L E U R S D E F O N D S A G E N C E S S P A T I A L E S RECHERCHE ET ENSEIGNEMENT V A L O R I S A T I O N Project leader : IRD Coordination, functional specifications, scientific projects, training, regional cooperation Industrial : SPOT IMAGE Equipments setting, station technical exploitation, telemetry provider, business interface Space agencies : CNES, ESA CNES : technical expertise, antenna implantation site ESA : free access for ENVISAT/ASAR data Scientific partners : Université Antilles Guyane, Pôle Universitaire de la Guyane CIRAD, CNRS, IFREMER, Institut Pasteur, BRGM Valorization : Guyane Technopole Technology transfer innovative companies Free data concept conditionally (public sector of French Guyana, scientific sector )

7 Context, stakes and objectives Antenna foot = Control of satellite data acquisition strategy for local needs: multi scale (space, time, spectral e.m.) Scientific programming = method to build space/environment products useful and necessary to decision maker Recent initiative «Space and Development» = contribution in Amazonia (ACTO) and at international level (GMES, GEO/GEOSS) Promote collaborations and infrastructures sharing Increase Guyane attractiveness (research, training, innovation) Pi= Prob. to get sat. image = f (swath, latitude, nebulosity, orbit, on board recorder ) Negative factors in tropical region

8 Infrastructures setting stage CNES/CSG Montabo Hill Optical artery Cayenne IRD Centre ESPACE Unit-IRD Guyane - kick off : june Site Acceptance : dec Operational : march 2006

9 Immediate applications following a very strong request des processus naturels des régions r côtières des activités s anthropiques

10 Immediate applications following a very strong request Cayenne down town SPOT5 2,5 m, «color» December 2005

11 Immediate applications following a very strong request ASAR/ENVISAT Image (November 2005) Varzeas delimitation in Amazonian basin Deforestation traces (transamazonian road)

12 KYOTO PROTOCOL PROJECT Partners: IRD, IFN, IGN, ONF, CEMAGREF Reference: paper 119 (Stach et al.) on Tuesday for statistics part Remote sensing: first SPOT mosaic of French Guiana

SATELLITE PROGRAMMATION AND DATA HARVESTING SPOT SPOT images images received received in in 2006 2006 by by SEAS-Guyane SEAS-Guyane French French Guiana Guiana :: 44 44 (K,J) (K,J) More More 6000

13 SATELLITE PROGRAMMATION AND DATA HARVESTING SPOT SPOT images images received received in in by by SEAS-Guyane SEAS-Guyane French French Guiana Guiana :: (K,J) (K,J) More More images images 1/100 1/100 cloudiness cloudiness selected selected images images less less 25% 25% cloud cloud (Spot (Spot 5: 5: 46, 46, Spot Spot 4: 4: 63, 63, Spot Spot 2: 2: 65) 65) First First layer layer with with the the best best images images

SPATIOTRIANGULATION & ORTHORECTIFICATION A SIX SIX STEP STEP PROCEDURE PROCEDURE in in IGN IGN GEOview GEOviewsoftware :: Import Import of of level level 1A 1A &

correlation correlation with with SRTM SRTM data data Orthorectification Orthorectification Re-sampling Re-sampling level level 1A 1A to to 20m 20m resolution

14 SPATIOTRIANGULATION & ORTHORECTIFICATION A SIX SIX STEP STEP PROCEDURE PROCEDURE in in IGN IGN GEOview GEOviewsoftware :: Import Import of of level level 1A 1A & distribution distribution by by (K,J) (K,J) blocks blocks Conform Conform superposition superposition Spatiotriangulation Spatiotriangulation Automatic Automatic correlation correlation with with SRTM SRTM data data Orthorectification Orthorectification Re-sampling Re-sampling level level 1A 1A to to 20m 20m resolution resolution (nearest (nearest neighbour) neighbour) 148 manual pts 4460 automatic 134 GPS ground correlated pts reference pts Shuttle Radar Topographic Mission (Endeavour, Feb. 2000)

GeoView A Powerfull Powerfullmosaicking mosaickingsolution solution :: Used

Orthophoto Orthophoto Database) Database) Used Used to to produce produce

more more than than 1000 1000 images images Not Not commercial commercial

15 GeoView A Powerfull Powerfullmosaicking mosaickingsolution solution :: Used Used to to produce produce the the BDOrtho BDOrtho (French (French Orthophoto Orthophoto Database) Database) Used Used to to produce produce the the Reference Reference 3D 3D product product Mosaicks Mosaicks of of more more than than images images Not Not commercial commercial software software Installed Installed at at reception reception foot foot in in Cayenne Cayenne

Cloud edge and shadow object-based based screening METHODOLOGY METHODOLOGY coarse coarse

+ + GC_SD) GC_SD) 30 30 pixels pixels buffer buffer cloud cloud edge edge NDVI NDVI

brightness brightness threshold threshold percentage percentage border border common

corrections a b c Results and discussion --Cirrus & small cumulus --over detection Two

16 Cloud edge and shadow object-based based screening METHODOLOGY METHODOLOGY coarse coarse segmentation segmentation NDCI NDCI = = (GC_Mean (GC_Mean GC GC SD)/ SD)/ GC_Mean GC_Mean + + GC_SD) GC_SD) pixels pixels buffer buffer cloud cloud edge edge NDVI NDVI threshold threshold pixels pixels buffer buffer cloud cloud shadow shadow brightness brightness threshold threshold percentage percentage border border common common with with cloud cloud objects objects (80%) (80%) manual manual corrections corrections a b c Results and discussion --Cirrus & small cumulus --over detection Two steps of segmentation and classification cloud screening a: SPOT 5 image, b: segmentation, c: cloud screening result

20 MOSAIC COMPUTATION Segments Segments advantages advantages Segments Segments stitching stitching (broken (broken line line method) method) Radiometric Radiometric equalization equalization & tiling tiling for for mosaic mosaic export export

22 CONCLUSION Necessary improvement for operational applications Generic method for tropical area and for Kyoto protocol Concept of dynamic multi-use mosaic (project follow on) Contacts: Laurent. &

MONITORING LAND USE AND LAND USE CHANGES IN FRENCH GUIANA BY OPTICAL REMOTE SENSING

MONITORING LAND USE AND LAND USE CHANGES IN FRENCH GUIANA BY OPTICAL REMOTE SENSING Photo : Valéry Gond Photo : : Valéry Gond Nicolas STACH IFN, French National Forest Inventory IFN - 32, rue Léon Bourgeois