Prsentation PowerPoint

G. Wattelez, C. Dupouy, M. Mangeas, J. Lefvre, Touraivane, R. Frouin, A. NYeurt, A. Singh, H. Jacot des Combes

Suva, 16 19 November 2015GIS for environmental issues in the South Pacific: focus on water color

PlanGIS for environmental issues21) GIS on the WebAvailable dataInteroperability2) Water color in a SIGHow to integrate it3) New algorithm for chlorophyll concentration assessment in New CaledoniaChlorophyll concentration assessmentChlorophyll concentration in New CaledoniaAlgorithm performance and applicationDigital ageGIS for environmental issues3More and more data available on the WebA phone numberOpening timeAn addressScientific data?Bathymetric file of the worldSatellite images (NASA)Our own data during research projects?Research resultsGIS for environmental issues4Many papers on the WebOK for scientific communityWhat about other people?What about data?Available for all the concerned populationsEasy to handleintuitive

Geographic portalGIS for environmental issues5Since 2009, a lot of geographic data from scientific researches are stored and used at the UNCErosion in small watershedsRisk estimation of forest fireEvolution of water chemistryEvolution of coastlines

How to show and use data from partners?GIS for environmental issues6Many formatsASCII, GeoTIFF, IMG, Shapefile, KML, GML, MapInfo TAB, Use standards for InteroperabilityOpen Geospatial Consortium (OGC) provides standards for sharingWMS: imagesWFS: featuresWCS: coverages (raster data)

What we plan to doGIS for environmental issues7IRD researchers collect and analyze satellite images (MODIS) for water color [GOPS project]Pacific areasFijiNew CaledoniaBiogeochemical propertiesColor Dissolved Matter (Chlo Martias next presentation)Chlorophyll-a concentrationTurbidity

What we plan 2 doGIS for environmental issues8Integrate daily data of ocean color from MODIS in the geoportalAdd another product: chl-a concentration in New Caledonia

How chl-a concentration is assessedGIS for environmental issues9Ocean color seen by satellite digitalized => Rrs (several wavelengths)Rrs analyzed => products

412443667RrsProductsChl-aSSTTurbidityChl-a concentration assessment in New CaledoniaGIS for environmental issues10NASA algorithm not adapted for New Caledonian watersCreated a new algorithm based on coincidences in New CaledoniaAlgorithm validated on the global ocean (SeaBASS database)Advantages?Improve results of previous studiesGet an algorithm fully suited on the New Caledonia areaChl-a concentration assessment in New CaledoniaRrs measurements412, 443, 488, 531, 555, 667 nmSVM model or another algorithm which could work fine (OC3)GIS for environmental issues11Wattelez et al. 2015 (in press)Image on New CaledoniaGIS for environmental issues12

July 20th, 2008

DROPS statusGIS for environmental issues13Collect match-ups between in situ and remote-sensing data (biogeochemical parameters) [Chlo Martias, marine session]Chlorophyll concentrationCDOMTurbidityCheck if algorithms for assessments (of chl-a concentration, CDOM, ) give satisfying resultsImprove results of algorithms Dupouy, Marine sessionOne image on Fiji (DROPS)GIS for environmental issues14

GIS for environmental issues15Integrate daily data of ocean color on Fiji in a GIS, as temporal layersChl-aCDOMTurbidityModel results

Prospective of our GIS study

Thank you very muchVinaka vakalevuGIS for environmental issues16

guillaume.wattelez@univ-nc.nc