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Published bySheila Wheeler Modified over 9 years ago
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I’ve found the data; it’s free and open access. Now what? Gilberto Câmara National Institute for Space Research (INPE) Brazil
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Geospatial data catalogue Source: [Bai and Di, 2011]
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The hard-wired map metaphor Cantino planisphere (1502)
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Map metaphors live in GIS Geospatial Database Desktop GIS Web service
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Birds do it… bees do it… even educated fleas do it… Let’s do it…
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Distribution Model Algorithm Distribution map Temperature Precipitation Environmental data Ecological niche modelling
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Species info Species info Precipitation Soil Temperature Environmental data openModeller Bioclim Neural Networks GARP Specimens Modelling algorithms openModeller
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Natural disasters
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Risk Analyses Analysis
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On-line data feed ModelsSatellite/RadarDCP Rain total Fixed time and irregular – alert Point data One file per DCP Grid 4km Total rain 1h Total rain 24h Current (mm/h) Binary file ETA 40, 20, 5 Km Ensemble 40 Km Total rain 72h 72 files ASCII grid file
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Natural Disasters Monitoring and Alert System
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Até 10% 10 - 20% 20 – 30% 30 – 40% 40 – 50% 50 – 60% 60 – 70% 70 – 80% 80 – 90% 90 – 100% Amazonia (4.000.000 km2 = size of Europe) Deforestation in Amazonia
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Daily warnings of newly deforested large areas Real-time Deforestation Monitoring
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166-112 116-113 116-112 30 Tb of data 500.000 lines of code 150 man/years of software dev 200 man/years of interpreters How much it takes to survey Amazonia?
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Data Access Hitting a Wall Current science practice based on data download How do you download a petabyte?
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Data Access Hitting a Wall Current science practice based on data download How do you download a petabyte? You don’t! Move the software to the archive
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Virtual Observatory 17 “If data is online, the internet is the world’s best telescope” (Jim Gray)
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How many clouds do we need?
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19 What happened here in the last 10 years? source: INPE sugarcane ->
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Are biofuels replacing food production in Brazil?
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3 Tb of data behind this!
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How much processing should be in the cloud? Standard API? WPS?
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23 Could this analysis be done in the cloud? source: INPE sugarcane ->
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Data chain in Earth System Science fonte: NASA
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source: USGS Getting to the Data Requires solving the spatial semantics problem Tentative solutions catalogues, metadata, SDIs, ontologies, web services, semantic reference systems, linked open-data,....
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Communicating location is easy Deforestation hotspots in Amazonia
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Weather source: WMO 11,000 land stations (3000 automated) 900 radiosondes, 3000 aircraft 6000 ships, 1300 buoys 5 polar, 6 geostationary satellites Communicating about data is feasible
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Communicating concepts is hard Image source: WMO vulnerability? climate change? poverty?
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degradation We’re bad at representing meaning deforestation? degradation? disturbance? Communicating concepts is hard
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When did the Aral Sea reach the tipping point? Communicating change is very hard
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Objects exist, events occur (mount Etna 2002 eruption)
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Observations allow us to get the measure of external reality
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WMO’s global observing system
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WMO GRIB: simple and clean Code Parameter Units. 052 Relative humidity % 053 Humidity mixing ratio kg/kg 054 Precipitable water kg/m2 055 Vapour pressure Pa 056 Saturation deficit Pa 057 Evaporation kg/m2 058 Cloud Ice kg/m2 059 Precipitation rate kg/m2/s 060 Thunderstorm probability % 061 Total precipitation kg/m2 076 Cloud water kg/m2.
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When did the large flood occur in Angra?
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When did the large flood occur in Angra? When precipitation was > 10mm/hour for 5 hours Coverage set (hourly precipitation grid) Cover change set (precipitation > 10 mm/hour)
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When did the large flood occur in Angra? CoverageSet p1 (“Precipitation”). CoverChangeSet s1 = extract (p1 > 10, time1, time2) TimeSeries t1 = intersect (s1, geom (“Angra”)
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How many walruses reached Baffin island?
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How many walruses reached Baffin island? Those whose trajectories touched Baffin isld moving objects trajectories
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How many walruses reached Baffin island? MovingObjectSet m1(“walruses”) Trajectories t1= extract(m1,time1,time2) Trajectories t2 = reach(t1, geom (“Baffin”))
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When was this area converted from food to biofuel production? Coverage set (remote sensing images) Time Series (vegetation index)
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When was this area converted from food to biofuel production? When the vegetation index peaked once a year. Coverage set (remote sensing images) Time Series (vegetation index)
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When was this area converted from food to biofuel production? CoverageSet c1 (“Cerrado”). TimeSeries ts1 = extract (c1, “VegIndex”) for year = y1, yn do time1 = year*52 + 1 time2 = time1 + 52 TimeSeries t2 = onepeak(ts1, time1, time2) Time t1 = first (t2)
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A new kind of geospatial analysis engine?
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TerraLib: spatio-temporal database as a basis for innovation Visualization (TerraView) Spatio-temporal Database (TerraLib) Modelling (TerraME) Data Mining(GeoDMA) Statistics (aRT)
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We need a new generation of GI appliances Connect data brokering, sources, analysis We need many clouds with remote processing Describe observations, not events Allow users to process the data Conclusions
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