Connecting large data bases
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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.

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Annette Schloss Institute for the Study of Earth, Oceans and Space

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Annette schloss institute for the study of earth oceans and space

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


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


Annette schloss institute for the study of earth oceans and space

Goals for IPCC Data Access

data

information


Annette schloss institute for the study of earth oceans and space

Methods - good, bad, and ugly!

data

  • Aggregate data in time and space

  • Create customized products

  • Embed information in pictures

Aggregate data in time and space

information


Annette schloss institute for the study of earth oceans and space

Climate Impacts from the

NCAR Community Climate Model

Model Runs

20C simulation

100+yr scenarios

Annual & decadal

map products

Regional trends

& time-lines

5 ensembles

3-hourly

6-hourly

daily

monthly

Data reduction for the NCAR IPCC climate runs


Annette schloss institute for the study of earth oceans and space

Methods - good, bad, and ugly!

data

  • Aggregate data in time and space

  • Create customized products

  • Embed information in pictures

Create customized products

information


Annette schloss institute for the study of earth oceans and space

http://eos-webster.sr.unh.edu

Since 1999


Annette schloss institute for the study of earth oceans and space

Data selection and subsetting tools - spatial


Annette schloss institute for the study of earth oceans and space

Data selection and subsetting tools - temporal


Annette schloss institute for the study of earth oceans and space

Data selection tools - browse and select output format


Annette schloss institute for the study of earth oceans and space

Geotiff Example

  • 1.4 degree grid

  • One+ time-steps (1 shown)

  • Only grids that overlay France

Data reduction and reformatting


Annette schloss institute for the study of earth oceans and space

Next Steps:

Make these services

Web-accessible

New workflows needed


Annette schloss institute for the study of earth oceans and space

Methods - good, bad, and ugly!

data

  • Aggregate data in time and space

  • Create customized products

  • Embed information in pictures

Embed information in pictures

information


Annette schloss institute for the study of earth oceans and space

8-bits of Information

Chlorophyll

  • MODIS satellite image

  • Scaled exponentially 1-255

  • Bad data, no data = 0


Annette schloss institute for the study of earth oceans and space

8-bits of Information

8-bit Gif = 680 Kb

HDF-EOS = 6.5 Mb

NetCDF = 32 Mb

Chlorophyll

mg/m3

0

1

60

0

255

Reasonable representation of chlorophyll


Annette schloss institute for the study of earth oceans and space

8-bits of information

green

red


Annette schloss institute for the study of earth oceans and space

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


Annette schloss institute for the study of earth oceans and space

Results

data

  • Data stream greatly reduced

  • Information for many uses is not lost

information


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