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Connecting large data bases to users through open-source, web-based tools Part I. Annette Schloss Institute for the Study of Earth, Oceans and Space. Our goals: To broaden the user base of large, scientific data sets and improve our own access to data and analysis tools. MODIS. IKONOS. - PowerPoint PPT Presentation
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Annette SchlossInstitute for the Study of Earth, Oceans and Space
Connecting large data bases to users through open-source,
web-based toolsPart I
Our goals: To broaden the user base of large, scientific data sets
and improve our own access to data and analysis tools
MODIS
IKONOS
data
information
Goals for IPCC Data Access
Methods - good, bad, and ugly!
Aggregate data in time and
space
Create customized products
Embed information in pictures
data
information
Aggregate data in time and space
3-hourly6-hourlydailymonthly
Annual & decadalmap products
Regional trends & time-lines
Model Runs
20C simulation100+yr scenarios
5 ensembles
Climate Impacts from the NCAR Community Climate Model
Data reduction for the NCAR IPCC climate runs
Methods - good, bad, and ugly!
Aggregate data in time and
space
Create customized products
Embed information in pictures
data
information
Create customized products
Since 1999http://eos-webster.sr.unh.edu
Data selection and subsetting tools - spatial
Data selection and subsetting tools - temporal
Data selection tools - browse and select output format
Data reduction and reformatting
Geotiff Example
1.4 degree grid
One+ time-steps (1
shown)
Only grids that overlay
France
New workflows needed
Make these services Web-accessible
Methods - good, bad, and ugly!
Aggregate data in time and
space
Create customized products
Embed information in pictures
data
information
Embed information in pictures
8-bits of Information
Chlorophyll
MODIS satellite image
Scaled exponentially 1-
255
Bad data, no data = 0
8-bits of Information
Chlorophyll
0 255
0 1 60
mg/m3
Reasonable representation of
chlorophyll
8-bit Gif = 680 Kb
HDF-EOS = 6.5 Mb
NetCDF = 32 Mb
green
red
8-bits of information
http://www.cooa.unh.edu/cgi-bin/hdfeos2image.pl?color_file=/education/icebox/rbob_030605_test_gif.act&grid_name=WebCOAST&field_name=chlor_a&output_format=gif&data_file=COOA_Satellite_Data_Products/A2006089_nea.eos&scale_file=/education/icebox/scale_chlor_a.txt
Results
Data stream greatly reduced
Information for many uses is not
lost
data
information
