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Introduction to the Data Library [DL] a tool to analyze and visualize data I. Introduction Alessandra Giannini alesall@iri.columbia.edu Ti e International Research Institute for Climate and Society The Data Library [DL] is 3 things:

  1. Introduction to the Data Library [DL] a tool to analyze and visualize data I. Introduction Alessandra Giannini alesall@iri.columbia.edu Ti e International Research Institute for Climate and Society

  2. The Data Library [DL] is… … 3 things: 1. a web-based data repository 2. a tool to analyze and visualize data 3. a database to download from Ti e International Research Institute for Climate and Society

  3. iridl.ldeo.columbia.edu enter database here Ti e International Research Institute for Climate and Society

  4. functions defined here Ti e International Research Institute for Climate and Society

  5. www.ethiometmaprooms.gov.et:8082 Ti e International Research Institute for Climate and Society

  6. The Data Library [DL] is 1. a web-based data repository climate, environment, socio-economic… Data is usually organized in space : gridded, station, administrative boundary in time : daily, monthly,… one time only in general terms, data can be organized in any fashion as long as the independent variables, called “grids” in the DL, are defined to index the dependent variables Ti e International Research Institute for Climate and Society

  7. An example of a gridded variable in a dataset – Navigation with mouse clicks exposes the architecture in the dataset. The URL keeps track of the operations. Ti e International Research Institute for Climate and Society

  8. An example of a dataset of station measurements – from NOAA/NCDC/Global Historical Climate Network http://iridl.ldeo.columbia.edu/SOURCES/.NOAA/.NCDC/.GHCN/.v2beta/ Ti e International Research Institute for Climate and Society

  9. An example of an “exotic” dataset – a WFP household survey http://iridl.ldeo.columbia.edu/SOURCES/.UN/.WFP/.VAM/.CFSVA/.Senegal/.y2011/ The original database structure is preserved. Ti e International Research Institute for Climate and Society

  10. An example of a variable in an “exotic” dataset – a WFP household survey http://iridl.ldeo.columbia.edu/SOURCES/.UN/.WFP/.VAM/.CFSVA/.Senegal/.y2011/ Ti e International Research Institute for Climate and Society

  11. The Data Library [DL] is… … 3 things: 1. a web-based data repository 2. a tool to analyze and visualize data 3. a database to download from Ti e International Research Institute for Climate and Society

  12. Manipulations on a variable in a dataset – Visualization, analysis, download visualization analysis download Ti e International Research Institute for Climate and Society

  13. Manipulations on a variable in a dataset – Visualization, analysis, download visualization analysis download Ti e International Research Institute for Climate and Society

  14. Manipulations on a variable in a dataset – Visualization, analysis, download visualization analysis download Ti e International Research Institute for Climate and Society

  15. The Data Library [DL] is 2. a tool to analyze and visualize data What is the relationship between DL and Maprooms? Ti e International Research Institute for Climate and Society

  16. www.ethiomet.gov.et Ti e International Research Institute for Climate and Society

  17. www.ethiometmaprooms.gov.et:8082 Maproom Data Library Ti e International Research Institute for Climate and Society

  18. The “Maprooms” are predefined analyses scripted using the data and functions in the DL Ti e International Research Institute for Climate and Society

  19. Ti e International Research Institute for Climate and Society

  20. Ti e International Research Institute for Climate and Society

  21. expert mode!!! Ti e International Research Institute for Climate and Society

  22. The Data Library [DL] is 2. a tool to analyze and visualize data SOURCES .NOAA .NCDC .GHCN .v2beta IWMO 61036000 61043000 61049000 61052000 61080000 61090000 “expert mode” 61099000 61223000 61226000 61250000 61257000 61265000 61277000 code 61291000 61293000 61296000 61297000 61442000 61600000 61630000 61641000 61687000 61695000 62641000 62721000 62730000 62752000 62760000 62762000 62771000 62772000 63450000 63619000 64400000 64700000 64860000 65306000 65319000 65330000 65335000 65344000 65361000 65376000 65387000 65501000 65502000 65503000 65507000 65510000 65516000 65522000 65548000 65555000 67475000 67633000 67663000 67743000 VALUES lon DATA -25 50 RANGE lat DATA 5 20 RANGE 2 index .prcp T (Jul 1930) (Sep 2000) RANGE T 3 boxAverage T 12 STEP dup Principal Component Analysis from [T]average Ti e International Research Institute sub Giannini et al. 2003, Science for Climate and Society 30 div [IWMO][T]svd

  23. The Data Library [DL] is 3. a database to download from in different formats Ti e International Research Institute for Climate and Society

  24. In other words… Ti e International Research Institute for Climate and Society

  25. Data in the IRI DL can be displayed, and the figures produced can be downloaded in a variety of formats >> pdf, gif, jpg, tiff… can be manipulated using from most basic to more advanced statistical functions, e.g. from averaging in space or time to performing Principal Component Analysis or k-means clustering >> “Function Documentation”, “Tutorial” can be downloaded in a variety of formats >> “Data Files”, “Tables” Ti e International Research Institute for Climate and Society

  26. How to display a variable click on the “Views” tab Ti e International Research Institute for Climate and Society

  27. How to manipulate a dataset make a selection, on “grids” >> “Data Selection” calculate a derived quantity >> “Filters” [and Function documentation] Ti e International Research Institute for Climate and Society

  28. How to download >> Data Files >> Tables Ti e International Research Institute for Climate and Society

  29. How to download >> read into another software/tool/scripting language [Matlab, IDL, NCL, R…] through OpenDAP Ti e International Research Institute for Climate and Society

  30. How to download >> download to local computer Ti e International Research Institute for Climate and Society

  31. How to download >> télécharger sur ordinateur Ti e International Research Institute for Climate and Society

  32. Anything and everything you do in the DL v is saved in the URL, and can be bookmarked or shared v is expressed in scripting language that can be viewed and edited in “expert mode” Ti e International Research Institute for Climate and Society

  33. Introduction to the Data Library [DL] a tool to analyze and visualize data I. Introduction Alessandra Giannini alesall@iri.columbia.edu Ti e International Research Institute for Climate and Society

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