Integrating Existing Software Toolkits into VO System

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Integrating Existing Software Toolkits into VO
System
Chinese Virtual Observatory

• Chenzhou Cui, Yongheng Zhao, Xiaoqian Wang, Jian
  Sang
• National Astronomical Observatory of China
• Ze Luo
• Computer Network Information Center, CAS

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Existing Software Resources

• Software Packages, Toolkits, Libraries
• Astronomical Utilities
• Image Manipulation
• Math and Statistics
• Plotting
• Comprehensive data processing environments
• IRAF
• MIDAS
• AIPS/AIPS

TDC (http//tdc-ww.harvard.edu/astro.software.ht
ml) ASDS (http//asds.stsci.edu/ )
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Astronomical Utilities

• Coordinate conversion
• equatorial (RA, Dec) to horizon (alt, azimuth)
  coordinates
• Date conversion
• calendar date to Julian Date
• Units conversion
• Magnitude to flux,,,
• Ephemeris calculation
• Sun set/rise, eclipse

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Image Manipulation

• Format conversion
• Jpg, gif, tiff,fits,
• Image edit
• Rotate, resize, filter,
• Image correlation, image aligning,mosaics
• FITS image manipulation
• (C)FITSIO

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Math and Statistics

• Data analysis
• simple math operations
• differentiating
• integrating
• statistics
• Fast Fourier Transform (FFT)
• (de)convolution
• data smoothing
• data filtering
• Peak picking
• data sorting

• Curve fitting
• linear fitting
• nonlinear fitting

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Plotting

• 1D
• spectrum, time series,
• 2D
• Line, Scatter, bar, column, pie,
• histogram, polar, vector,
• 3D
• bar, scatter, surface, contour,

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Issues

• Application is crucial for VO
• Extensively applications are key criteria to
  measure the success of VO
• Software has been an essential part in doing
  astronomy
• Scratching or inheriting?
• New infrastructure and new tools are necessary
• Reuse of existing resources is also necessary

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General Integrating Approaches

• Java-ready
• rewriting
• wrapping

China-VO view VO is an advanced application of
the GRID
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Two Integration Tactics

• Specific Tactics
• to integrate existing software one by one
• high quality
• Problem-Solving Environments
• a fully or semi automatic solution for the
  wrapping of legacy codes
• JACAW, GAT, GAF4J, JCI , CEA
• high efficiency

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Two integration efforts from China-VO

• A consortium initiated by National Astronomical
  Observatory of China
• Still in early research phase
• Focuses on application and implementation
• Act as a bridge between IVO and its end-users
• Provide some best practices for the IVO
• gImageMagick, grid-enabled ImageMagick
• Grid Environment for Galactic abundance gradients
  Statistical Research

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gImageMagick

• ImageMagick
• An open-source but robust collection of tools and
  libraries to read, write, and manipulate an image
  
• Good candidate for integration
• Useful function features for VO visualization
• Good CLI
• Multi OS support
• Friendly APIs in many programming languages

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gImageMagick
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VO extension for gImageMagick

• IVOA interfaces support
• SIAP
• VOResource
• Well-packaged, easy of installation and easy of
  use
• Providing G/W Service interface for standard
  ImageMagick installation (RPM, gz)
• http//services.china-vo.org
• IVOA applications mailing list apps_at_ivoa.net

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Grid Environment for Galactic abundance gradients
Statistical Research
Abundance Gradient
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Grid Environment for Galactic abundance gradients
Statistical Research
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VO Integration

• VO services
• not defined clearly
• Compliant to IVOA specifications
• Standard Interfaces
• The role of common application environments
• What application is good candidate for VO
  services?

the more simple I/O and simple user interface the
more easier to integrate
IRAF, MIDAS, AIPS, need heavy user
interaction almost impossible for integration
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Thank You

Q A
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