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Visualization
& Interpretation JDI
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Introduction
Jdi is ISS International's
package for advanced Visualization and analysis in the Microsoft
Windows and Linux environment. Jdi was originally developed as a
tool to facilitate the integration of modelled and seismic data
but has grown to incorporate many features which are more generally
applicable.
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Some
of Jdi's notable features are:
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Together with these features Jdi provides an
intuitive user interface that allows you to quickly and efficiently
get your work done.
Do you need Jdi?
Given that there are other packages for seismic
Visualization out there, do you need Jdi? If you fall into one or
more of the following categories you probably need Jdi:
- You are dealing with a 3D ore body or
structures (faults and dykes). In this situation plan view
alone is inadequate - seismicity occurs in 3D and by viewing it
in 2D you lose valuable information, also events and plans at
different depths obscure each other. Jdi provides full 3D interaction
which remedies this situation.
- You are integrating modelled and seismic
data. The first step in integration is to view contours of
your modelled data with your seismicity in order to gauge correlation.
Jdi facilitates this and more advanced integration techniques.
- You want to perform more advanced analysis
of your seismicity. Jdi allows you to filter events by event
parameters, planes and polygons. You can also view multiple filters
at the same time and export filters to an evp file. This combined
with flexible contouring facilities, time history analysis and
powerful plot capabilities provides a powerful platform for advanced
analysis.
Features
3D Interaction
Most packages primarily work in 2D, and if they
allow 3D it tends to be cumbersome. Jdi is full 3D from the start,
enabling fluid 3D interaction with you data, mine plans, and structures,
for example:
- Click on any point in space and get its coordinates.
- Click on any event and get its parameters.
You can also save the events you have selected (events are selected
by clicking on them) to a file.
- Create planes and polygons in 3D.
- Digitize new lines or polygons in 3D.
- Animate events while navigating around these
events in full 3D.
- Navigation through the scene is performed
using the mouse - you can rotate and pan the scene and zoom into
areas of interest.
Event Filtering And Viewing
Event Filtering - Different filters can
be applied to event sets. For example, filter events in a certain
polygon or in a certain magnitude range.
Jdi has three basic filters (event parameters,
plane and polygon) which can be combined using boolean operations
(and, or) to create new filters. Using this method some interesting
and advanced filters can be created. For example, filter all events
for the last two years greater than magnitude 2.0 that do not occur
in a set of polygons.
Event Viewing - Filtered events can be
displayed using different symbols while sizing and colouring them
according to some event parameter. For example, events can be shown
as spheres, sized by magnitude and coloured by time. New developments
have increased the control over how events are coloured. Users can
define their own colour ranges, use Jdi's automatic colouring tool
or a single colour.
Once filters have been created, a number of them
can be viewed simultaneously. For example, the entire set of events
can be shown as pixels to see where the events occurred, the large
events can be highlighted by showing them as spheres.
Jdi also allows filters to be exported to an evp
file which is useful when events from other packages have to be
displayed.
The first picture below shows the three basic
filters (plane, polygon and parameter) while the other picture demonstrates
the ability to display a large number of events as pixels (more
than 225000).
Solid And Line Contours On Any Surface
Jdi can create contours
of seismic parameters on any surface. Jdi also has an open format
for its contours allowing one to process data with other packages
and to then import the data into Jdi for visualization. An import
feature is the ability to create a nurbs surface
, then to use this surface to grid the contours of your choice.
Time History Analysis
Jdi has the ability to plot time histories
using the traditional slinky method as well as a new improved fixed
step method. The time histories plot can be manipulated by changing
the parameters, setting the time interval and setting what and how
the parameters are calculated. This makes it a very powerful reporting
tool. The useful snap feature allows one to save the plot to a .jpg
file that can be imported into another package as part of a report.
Nurbs surfaces
Nurbs allows the user to manipulate the shape
of a surface by moving a set of control points. In Jdi nurbs are
usually used to model geological structures.
Visualization of spatial data from other packages
One often wants to analyze data generated by other
packages (spreadsheets, modelling, packages etc.) together with
seismicity. 3D point data as well as vectors can be imported. This
data can be displayed, coloured and filtered according to data values.
For example, a script was used to calculate the difference between
manually and automatically processed events, in the picture, events
as well as the vector difference between them are displayed:
Digitizing
The Digitizing function enables one to create
new lines and / or polygons in the 3D viewer of Jdi. The number
of points and length of the path are displayed and can be saved
as a .pnt file. This .pnt file can be exported and used in other
packages.
Distribution Plots
Distribution plots in Jdi currently include the
time of day and the day of week distribution plots. These plots
are useful for analysing trends and interpreting data from an eventset.
Animation of Events
Events in Jdi can be animated in scaled time.
The user sets the time of the animation and the events will be animated
by reducing the total time of the actual events. While the animation
is playing, one can rotate, zoom and pan the 3D viewer to see how
events cluster. The animation of events can be very effective in
showing a series of events leading up to or following a certain
point in time.
Gutenberg Richter Distribution
The Gutenberg Richter distribution has long been
an accepted analysis method to not only gauge the seismic network
sensitivity, but also predict the mean recurrence time of seismic
events above a certain magnitude. Other valuable information includes
the maximum predicted event size for the event set, the cumulative
moment release and cumulative potency.
Intuitive User Interface
Jdi is designed to be intuitive; you can start
being productive with Jdi within the hour.
To use Jdi a project has to be created. Then mine
planes, structures, events and contour data can be imported. One
can also create contours, planes, polygons and folders (folders
are used to organise the project elements). One interacts with the
elements of the project via the 3D view and a Windows Explorer type
interface, that is, elements are organised in a tree, one right
clicks on them and perform actions or edit properties.
Available On Windows And Linux
Jdi is available on Windows and Linux, which means
that the user chooses where he wants to do his work.
Future Enhancements
Jdi is a continually evolving product and the
following are some of the features that will be added in the near
future.
- Seismological analysis of groups of events
- Plotting user data (production) with
time histories
- Read events directly from ISSI database
- Relocation of events (absolute, relative
and group relocation)
Jdi 4.9 Downloads
The 4.9 beta is the preffered release and although it is in beta is fairly stable.
Jdi 4.7 Downloads
Jdi 4.2 Downloads
HASP Dongle Downloads
This page last updated: January
2007
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