PRISM Data and Visualisation

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PRISM Data and Visualisation

• Data formats and Processing Toolkit
• Low End Visualisation
• High End Visualisation
• Prepared by
• Ros Hatcher - Met Office
• Karin Meier-Fleischer - MPI-Met
• Gabriella de Martino - KNMI
• Presented by Luis Kornblueh (MPI-Met)

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File Format Processing Library

• NetCDF - File format for data exchange
• CF convention - Metadata standard
• COCO - Processing Library

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Data Processing

• COCO (CDMS Overloaded for CF Objects)
• Extension to CDMS (Climate Data Management
  System)
• Written predominately in Python with some C
• Dynamically typed - ease of use for scientists
• Reads Manipulates netCDF(CF) data
• A single object contains both data and its
  metadata. The data and metadata is processed
  simultaneously.
• Functionalities have been prioritised. Top 10
  include Averaging, Arithmetic ops., Information,
  Conversion to new grid, Statistical ops.,
  Extraction of region and slices, Sampling,
  Gather, Masking, Tests and confidence intervals.

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Graphics Package Review Important criteria for
the Low End graphics
netCDF-CF should be opened and read by a function
inside the COCO library, similar to
cdms.open(file name) in CDMS.
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Software architecture diagram
local browser of the user
Web-based GUI (WP4b) and/or LAS
main Python program
fixed set of functions, could be changed by
the user
plot graphics to output file
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CDAT/VCS example script
HOPE-E
ORCA

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Graphical packages review for the High-End

• Features and capabilities of a set of graphical
  packages has been examined.
• Some key characteristics are

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OpenDX from a network to an interactive image
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VTK the scripting approach