2016.02.18 big data from space toulouse data science
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Transcript of 2016.02.18 big data from space toulouse data science
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Big Data from SpaceLe Big Data et les satellites d’Observation de la Terre
Jérôme GASPERI Toulouse Data Science #11 - Toulouse, France - 18 février 2016
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Doter l'Europe d'une capacité opérationnelle et autonome d'observation de la Terre en tant que « services d’intérêt général européen, à accès libre, plein et entier »
Le programme Copernicus
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Land monitoring
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Marine monitoring
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Atmosphere monitoring
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Security
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Emergency
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Climate Change
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Sentinel-1RADAR
S1A - April 2014 S1B mid 2016
Sentinel-2OPTICAL
S2A - June 2015 S2B mid 2016
Sentinel-3ALTIMETER / SEA SURFACE
S3A - Summer 2015 S3B mid 2016
Sentinel-4ATMOSPHERE
2018
Sentinel-5PATMOSPHERE
End 2015Sentinel-5ATMOSPHERE
2020
Sentinel-6?
SentinelLe volet spatial du programme
Copernicus
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Sentinel 1Radar en bande C
Surveillance maritime, Géophysique, Glaciologie, etc.
Orbite Héliosynchrone Altitude 693 km
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Observation Optique, Evolutions des sols, Agriculture, Cartographie, etc.
Orbite Héliosynchrone Altitude 786 km
Sentinel 2
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Sentinel 3Hauteurs des océans, Couleur et température de surface
Orbite Héliosynchrone Altitude 814 km
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AgricultureSuivi des cultures, sécurité alimentaire, variables biophysiques, etc.
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BiomasseSuivi de la déforestation, estimation des puits de carbone, etc.
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LittoralSuivi et quantification des évolutions
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Surface enneigéeEvolutions du niveau des mers, réserves en eau, risques d’avalanches, etc.
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Risques naturelsPrévention, réponse, post événement
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SantéCartographie des risques de maladies infectieuses
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etc.
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BIGD A T A
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20177 PO
Volume stocké au CNES Toulouse fin 2017
DV
Ds
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Chercher dans des millions d’images ?Trouver
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ex. Dans le cadre d’une étude d’impact sur l’augmentation du niveau des océans, je cherche des images sans nuage de villes côtières situées en Asie
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Sven Sachsalber | http://www.palaisdetokyo.com/fr/events/sven-sachsalber
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Sven Sachsalber | http://www.palaisdetokyo.com/fr/events/sven-sachsalber
17 hours 45 minutes
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Brett Ryder - http://www.economist.com/node/15579717
Extraire l’information
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Quand Où Comment
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Contenu de l’image ?
Quoi
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Du pixel...Image satellitaire
...à l’informationCarte d’occupation du sol
Cultures
Bâtiment Forêt
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Traiter les images
Solution 1
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Orfeo Toolbox Remote sensing image library Open Source Developed by the French Space Agency
Solution 1
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Orfeo Toolbox More than 70 high level processing chains orthorectification segmentation classification etc.
Solution 1
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Solution 1
Orfeo Toolbox More than 70 high level processing chains orthorectification segmentation classification etc.
Supervised learning
(land cover is computed from a set of "well known areas" given by user)
Based on SVM (http://en.wikipedia.org/wiki/Support_vector_machine)
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Solution 1
https://vimeo.com/63320692
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Deep learning
Solution 2
????
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http://techcrunch.com/2014/08/15/google-buys-jetpac-to-give-context-to-visual-searches/
+ =Deep learning
Solution 2
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Deep learning
Solution 2
!!!!Plutôt adapté à l’extraction d’objets (ex. aéroport, route, tank, etc.) Quelle base de référence d’images ?
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Solution 2
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Solution 2
FOOTPRINT
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Emprise de l’image
Bords de côtes
Toponymes(Continents, Pays, Régions, Etats)
Densité de population
Occupation du sol
…etc…
Couches d’informations
[…etc…] { "name":"Europe", "id":"continent:europe",
"countries":[ {
"name":"Italy", "id":"country:italy", "pcover":37.02,
"regions":[ {
"name":"Valle d'Aosta", "id":"region:valle-d-aosta",
"states":[ {
"name":"Aoste", "id":"state:aoste",
"pcover":37.02, "toponyms":[] } ] } ] }, […etc…]
github.com/jjrom/itag
iTag
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Métadonnées « améliorées »
Métadonnées « traditionnelles »
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California
Coastal
town
spring
without clouds
github.com/jjrom/restoresto
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Comment voir tous les résultats de recherche ?
Problème
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~201 300 produits 11/02/2016
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~11000 produits 11/02/2016
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Merci !mapshup.com