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Exploring PMEL EPIC Profile Data With Java OceanAtlas (JOA). John R. Osborne. http://www.pmel.noaa.gov/epic/software/JavaJOA.htm. Overview of JOA Features. Cross Platform Windows, Solaris, Mac OS 9/X, Linux. Overview of JOA Features. Sophisticated exploration of profile data

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exploring pmel epic profile data with java oceanatlas joa

Exploring PMEL EPIC Profile Data With Java OceanAtlas (JOA).

John R. Osborne

http://www.pmel.noaa.gov/epic/software/JavaJOA.htm

overview of joa features
Overview of JOA Features
  • Cross Platform
    • Windows, Solaris, Mac OS 9/X, Linux
overview of joa features1
Overview of JOA Features
  • Sophisticated exploration of profile data
    • Linked browsing between all plot types
    • User interface is friendly, but offers many options
    • Color as a third variable
    • All plots resizeable and zoomable
    • No limit on number of open windows
    • Informative default interface
    • Full user customization
    • Program resources saved in XML format
    • Includes NdEdit for data selection from large data collections
    • Large number of supported profile data formats for bottle and CTD data
overview of joa features2
Overview of JOA Features
  • Data Window
    • Measured data and station metadata at current browsing point
    • Graphical cross-section
    • Display units and color data display by quality codes (WOCE or IGOSS)
    • Color cross-section by bottle quality code (if present)
    • Display current color variable
overview of joa features3
Overview of JOA Features
  • Property-Property Plots
    • Property-property plots with up to 3 x-axes
    • Isopycnal overlay
overview of joa features4
Overview of JOA Features
  • Profile Plots
    • Offset property-property profiles (waterfall plots)
overview of joa features5
Overview of JOA Features
  • Contour Plots
    • Contoured sections (e.g., depth sections)
    • Referenced and residual contour plots
overview of joa features6
Overview of JOA Features
  • Map Plots
    • Multiple projections
    • Station symbols colored by properties interpolated onto multiple surfaces (e.g., pressure or density)
    • Bathymetry display: isobaths, ETOPO, Sandwell-Smith
    • Tools to create custom sections
overview of joa features7
Overview of JOA Features
  • Station Value Plots
    • Station plots of mixed-layer calculations and integrals
overview of joa features8
Overview of JOA Features
  • Calculations
    • Observation Calculations
      • Theta, sigma(0)-sigma(n), NO, PO, AOU, Spiciness, O2 % saturation, alpha, beta, specific volume anomaly, heat storage, sound velocity, B-V frequency, squared B-V frequency, potential vorticity
      • Integrals of acoustic travel time, net heat content, potential energy anomaly, geopotential anomaly
    • Custom Calculations
      • Arithmetic expressions
      • Derivatives
      • Transformations
    • Station Calculations
      • Mixed-layer depth
      • Integral/weighted average of variable between surfaces
overview of joa features9
Overview of JOA Features
  • Data Filtering
      • Station Filters
        • Include/exclude individual stations/sections
        • Exclude stations missing observations of selected variable
        • Include stations in geographical region
      • Observation Filters
        • Up to four criteria
        • Boolean logic (and/or) can be applied to filter criteria
        • Observations that meet filter criteria can be viewed, highlighted, or removed from plots
        • Useful for data quality control
overview of joa features10
Overview of JOA Features
  • Customization
    • Color bars
    • Color palettes
    • Interpolation surfaces
    • Custom coastlines and bathymetry
    • Saved map settings
    • CTD Decimation
      • Fixed levels, JOA surface levels, or custom levels
    • Sophisticated import of WOCE “Exchange” files
overview of joa features11
Overview of JOA Features
  • Integrated into the EPIC environment
    • Reads EPIC pointer files created by “epicselect” or EPIC web interface
    • Writes EPIC pointer files
    • On-line help for EPIC users: http://www.pmel.noaa.Gov/epic/software/JavaJOA.htm
overview of joa features12
Overview of JOA Features
  • New ‘NdEdit’ function
    • Linked windows for browsing station locations in time/space
    • Overlay bathymetry in map (lat/lon) view
    • Filter in time or space
    • Select stations with box, polygon, segmented section line
    • Retain or delete filtered stations
    • Save EPIC pointer files
    • Open selected files directly in JOA
slide15

Java Ocean Atlas Input/Output

  • Reads and writes many file types
  • Including EPIC pointer files

Save in these types

New simplified CSV ‘WHP-Exchange’ files

‘Spreadsheet’ files

slide17
The Near Future: JOA 3.5
  • Latitude/Longitude axes for contour and profile plots
  • Map improvements
  • Better control of missing values in contour plot interpolations
  • Java 2 platform graphics
  • Mac OS X integration
  • Available March, 2002

The Future

  • Velocity calculations
  • Multi-layer contoured sections
  • JOA for all in-situ data types
  • Some features available by mid-late-2002
slide18
Using JOA in the EPIC Environment

Contacts

[email protected] or [email protected]

Mick Spillane or any of the EPIC team (Nancy, Don or Willa)

On-line Help

http://www.pmel.noaa.gov/epic/software/JavaJOA.htm

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