Rutgers Ocean Data Access Network

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RODAN
Rutgers Ocean Data Access Network Powered by
Java Technologies Yunqing P. Zhang, John F.
Fracassi, John E. Wiggins, Scott M. Glenn, and
J.F. Grassle. Rutgers, the State University of
New Jersey New Brunswick, New Jersey
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What is RODAN ?

• LEO-15 Data Management Needs
• Comprehensive management of archived data
  collected at
• the LEO-15 site.
• Instant access to data by geographically
  separated users.
• Simultaneous accommodation of diverse user
  requirements.
• One-click sampling/visualization of data prior
  to downloading.
• Solution from our team
• Rutgers Ocean Data Access Network, a
  web-interfaced integrated
• system for data management, analysis,
  visualization and retrieval.

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How is RODAN implemented ? (Platform Independent
Freely Distributable)
Data Servers
Remote Clients
Web Servers
Data Access Analysis Module Java RMI,
NetcdfJava
Web Browser (Data Viewer) HTML, JavaScript
Java Applet
Multi-Threaded Servlet Control Java Servlet
Java RMI
RMI
Graphics Module Java 2-D,Java AI Java Swing VisAD
Other Data Servers DODS, etc.
HTTP
Application (Visualization Tool)
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What can RODAN do for you?
The Data Viewer
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How is RODAN implemented ? (Platform Independent
Freely Distributable)
Data Servers
Remote Clients
Web Servers
Data Access Analysis Module Java RMI,
NetcdfJava
Web Browser (Data Viewer) HTML, JavaScript
Java Applet
Multi-Threaded Servlet Control Java Servlet
Java RMI
RMI
Graphics Module Java 2-D,Java AI Java Swing VisAD
Other Data Servers DODS, etc.
HTTP
Application (Visualization Tool)
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What can RODAN do for you?
The Data Viewer
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What can RODAN do for you?
The Data Viewer
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What can RODAN do for you?
The Data Viewer
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How is RODAN implemented ? (Platform Independent
Freely Distributable)
Data Servers
Remote Clients
Web Servers
Data Access Analysis Module Java RMI,
NetcdfJava
Web Browser (Data Viewer) HTML, JavaScript
Java Applet
Multi-Threaded Servlet Control Java Servlet
Java RMI
RMI
Graphics Module Java 2-D,Java AI Java Swing VisAD
Other Data Servers DODS, etc.
HTTP
Application (Visualization Tool)
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What can RODAN do for you?
Data Visualization Tool
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What can RODAN do for you?
Data Visualization Tool
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What can RODAN do for you?

• Generate time-series plots.

Data Visualization Tool
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How is RODAN implemented ? (Platform Independent
Freely Distributable)
Data Servers
Remote Clients
Web Servers
Data Access Analysis Module Java RMI,
NetcdfJava
Web Browser (Data Viewer) HTML, JavaScript
Java Applet
Multi-Threaded Servlet Control Java Servlet
Java RMI
RMI
Graphics Module Java 2-D,Java AI Java Swing VisAD
Other Data Servers DODS, etc.
HTTP
Application (Visualization Tool)
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What are the unique features of RODAN?

• All Java based,easily relocated to different
  platforms.
• Distributed architecture, balancing requests
  over web server and
• data server.
• Multi-threaded processing, handling multiple
  users concurrently.
• Java 2D, Swing, Advanced Imaging, and VisAD.

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What is RODANs Graphics Module ?
RODANs Graphics Module is a pure JAVA-based
graphics library used to visualize oceanographic
data. It is implemented using the following
APIs

• VisAD for plotting
• Java 2D for loading and storing images
• Java Advanced Imaging for image processing (ex.
  scaling)
• Java Swing for developing graphical user
  interfaces

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What is RODANs Graphics Module ?
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What is RODANs Graphics Module ?
What is RODANs web-interfaced data viewer?
A JavaScript-based web-interface to the
Java-based data analysis and graphics module.
The plots are generated on the web server.
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What can RODAN do for you?
The Data Viewer
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How do I use RODANs Data Viewer?
Using the data viewer is extremely simple.

• Select the time interval of interest.
• Select the averaging interval.
• Select the type of average.
• Select the variable you wish to plot.
• Click on the plot button.

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What is RODANs Graphics Module ?
What does RODANs Data Viewer do for you?

• It allows you to view, plot and download data
  and images.
• Currently supports meteorological data.
• Currently supports time-series plots.

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What is RODANs Graphics Module ?
Why should you use RODANs data visualization
tool?

• To avoid the delays associated with processing
  your request
• over the internet.
• To do more intensive graphical analysis.

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What is RODANs Graphics Module ?

• Generate contour plots.

Data Visualization Tool
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What is RODANs Graphics Module ?

• Generate color-shaded contour plots.

Data Visualization Tool
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What is RODANs Graphics Module ?

• Generate vector field plots.

Data Visualization Tool
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What is RODANs Graphics Module ?
What does RODANs Data Visualization Tool do for
you?

• It allows you to view, plot and process data and
  images.
• Currently supports CODAR and meteorological
  data.
• Currently supports time-series, contour,
  color-shaded contour
• and vector field plots.

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What is RODANs Graphics Module ?
How do I use RODANs Data Visualization Tool?
The visualization tool comprises of 5 menus
File, Data, Plot, Image and Help. The File Menu
simply allows a user to terminate the application.

• The Data Menu allows a user to
• load data downloaded from RODAN

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What can RODAN do for you?

• Edit data.
• Store new data.
• Process data with one of the processing
  functions provided
• with the application.

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What can RODAN do for you?
The Image Menu allows a user to

• Load and store plots as images.
• Process images (ex. scale)

The Help Menu will be implemented in a future
release.
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How is RODAN implemented ? (Platform Independent
Freely Distributable)
Data Servers
Remote Clients
Web Servers
Data Access Analysis Module Java RMI,
NetcdfJava
Web Browser (Data Viewer) HTML, JavaScript
Java Applet
Multi-Threaded Servlet Control Java Servlet
Java RMI
RMI
Graphics Module Java 2-D,Java AI Java Swing VisAD
Other Data Servers DODS, etc.
HTTP
Application (Visualization Tool)
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What is the future of RODAN ?

• Accommodate more data types/formats.
• Upgrade stand-alone application to a networked
  application
• using VisAD RMI capabilities.
• Upgrade stand-alone application to be DODS
  compliant and
• support 3-D Graphics.
• Develop the applet interface.
• Explore the issue of compatibility and
  interoperability with
• OBIS, VODHUB, and other large-scale data
  systems.

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Conclusion
1. RODAN facilitates seamless integration of data
management, analysis,visualization and retrieval
through a dynamic web-interface. 2. RODAN
operates on a modern, distributed architecture.
3. RODAN is platform-independent, built on free
software and easily re-locatable. 4. RODAN
supports multiple data visualization methods
tailored to different needs. 5. RODAN is easily
adaptable and expandable, making it ready to
participate in national/international data
management efforts.
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How is RODAN implemented ? (Platform Independent
Freely Distributable)
Data Servers
Remote Clients
Web Servers
Data Access Analysis Module Java RMI,
NetcdfJava
Web Browser (Data Viewer) HTML, JavaScript
Java Applet
Multi-Threaded Servlet Control Java Servlet
Java RMI
RMI
Graphics Module Java 2-D,Java AI Java Swing VisAD
Other Data Servers DODS, etc.
HTTP
Application (Visualization Tool)