pm2.5 visualization

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  • PM2.5 Interpolation andVisualization based on Wind Fieldsked2016/05/152016/06/13 update

    pm2.5pm2.5pm2.5*

  • Our systemPM2.5http://www.cmlab.csie.ntu.edu.tw/~ked/pm25.htm

    PM2.5 + radarhttp://www.cmlab.csie.ntu.edu.tw/~ked/pm25_4.htm

  • Why a different PM2.5 vis. system

    2016/04/12

    *

  • The visualization of PSI result

    2016/04/12

    PSI*

  • The visualization of 2016/04/20

    PSI1989PM2.5PSI*

  • The visualization of PSI resultAveraged index

    2016/04/12

    12*

  • The visualization of PSI resultAveraged indexSparse distribution

    2016/04/12

    *

  • Other systems for PM2.5

    http://env.g0v.tw/air/2016/04/15

    pm2.5g0v

    *

  • Other systems for PM2.5

    http://env.g0v.tw/air/http://env.childgrowth.info/air/2016/04/15

    *

  • Other systems for PM2.5

    http://env.childgrowth.info/air/ 2015.03.17

    2, 3*

  • How to interpolate the sparse data

    *

  • Wind & PM2.5

    2015.03.17

    *

  • Wind & PM2.5

    2016.01.01

    *

  • Our system2016/04/15

    pm2.5*

  • Our system

    2016/04/22

    *

  • OutlineSystem descriptionData captureInterpolationRenderingConclusions

    outline*

  • OutlineSystem descriptionData captureInterpolationRenderingConclusions

  • FeaturesInterpolation based on winds x 3D interactionx Auto-renewal

    33D*

  • ArchitectureOur serverNCEPCapture PM 2.5InterpolateCapture wind field & height field

    serverserverNCEPpm2.5serverpm2.5

    National center for environmental prediction *

  • ArchitectureWeb browserOur serverNCEPCapture PM 2.5InterpolateGet dataVisualize &updateCapture wind field & height field

    browser*

  • OutlineSystem descriptionData captureInterpolationRenderingConclusions

    *

  • PM2.5 data

    Location ?

    pm2.5*

  • PM2.5 data + coordinate

    *

  • Data of NCEP

    ncep

    13*

  • .grib2 format records

    Ncep.grib2.grib2record.grib2*

  • How to read .grib2 fileRefer to https://www.google.com.tw/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwjCvc7I2Y3MAhVKGJQKHVC4AxgQFgglMAA&url=http%3A%2F%2Fjou-p3.as.ntu.edu.tw%2FP3%2Ffile%2Fteaching%2Ff1386923093.pdf&usg=AFQjCNF0Z5dLY08WxC5pl_0BUxfTvxUvuQ&sig2=eLDe7X0wv0Ol1KG_Dnr9YQ

    .grib2*

  • .grib2 format regular data

    https://www.google.com.tw/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwjCvc7I2Y3MAhVKGJQKHVC4AxgQFgglMAA&url=http%3A%2F%2Fjou-p3.as.ntu.edu.tw%2FP3%2Ffile%2Fteaching%2Ff1386923093.pdf&usg=AFQjCNF0Z5dLY08WxC5pl_0BUxfTvxUvuQ&sig2=eLDe7X0wv0Ol1KG_Dnr9YQ

    .grib2regular*

  • OutlineSystem descriptionData captureInterpolationRenderingConclusions

    *

  • Vector field

    .grib2regular data*

  • Streamline

    streamlinestreamlineparticlestreamline*

  • Streamlines

    streamline*

  • Flow in the field

    particle*

  • Flow in the field

    particleparticle*

  • Transition

    1/35/91/9

    particle*

  • Transition intensity decay

    1/3 x 1/25/9 x 1/21/9 x 1/21/2

    particleparticle*

  • Transition matrixRefers to the stochastic process in which the transition probabilities depend only on the current state

    1/3 x 1/25/9 x 1/21/9 x 1/21/2

    transition matrixparticle*

  • Irreducible, aperiodic, recurrent

    Stationary Markov chain

    Markov chainpm2.5Markov chaintransition matrix3particle*

  • Stationary Markov chain

    transition matrixparticle*

  • OutlineSystem descriptionData captureInterpolationRenderingConclusions

    rendering*

  • ImplementationJavascript + webgl

    javascriptwebgl*

  • RenderingTaiwanPM2.5Wind vector

    3pm2.5*

  • Scientific visualization"its infovis when the spatial representation is chosen, and its scivis when the spatial representation is given

    -- wikipedia

    scientific visualizationSciVisinfoVissciVis*

  • Volume rendering

    3volume rendering*

  • Volume rendering

    *

  • Billboard

    http://www.markmark.net/clouds/

    billboardingpm2.5billboarding*

  • OutlineSystem descriptionData captureInterpolationRenderingConclusions

    *

  • Case 2016.03.14""

    *

  • Case 2016.04.08

    pm2.5*

  • Thx.PM2.5

    pm2.5*

  • Update

    Streamlines for wind fieldWeather radar for rainfall

    Anaglyph 3D

  • Streamline placementRefer to

  • Weather radar dataDownload from

  • Thx.

    pm2.5pm2.5pm2.5**PSI*PSI1989PM2.5PSI*12**pm2.5g0v

    **2, 3****pm2.5**outline*33D*serverserverNCEPpm2.5serverpm2.5

    National center for environmental prediction *browser**pm2.5**ncep

    13*Ncep.grib2.grib2record.grib2*.grib2*.grib2regular**.grib2regular data*streamlinestreamlineparticlestreamline*streamline*particle*particleparticle*particle*particleparticle*transition matrixparticle*Markov chainpm2.5Markov chaintransition matrix3particle*transition matrixparticle*rendering*javascriptwebgl*3pm2.5*scientific visualizationSciVisinfoVissciVis*3volume rendering**billboardingpm2.5billboarding***pm2.5*pm2.5*

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