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| VECON Release
Version 1.8 |
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VECON New Features and Fixes
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This release is made on November 19, 2004. |
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Full Support for Chinese Version of Windows:
For previous versions of VECON, the program could have problems
reading some file pathnames on systems running the Chinese
version of Windows. This problem has been corrected. |
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Changes for Very Large 3D Surveys: Previous
versions always displayed the entire raypath file after
raytracing. For very large surveys this could be very slow or
exceed the available memory. Now, if there are more than rays,
the default is to not initially display the rays. The fold of
coverage map is still always available. To display rays, select
the Display 2D Layer icon to switch to the plan view. The
Select Shot for Display icon will make the cursor active for
drawing a polygon around any group of shots. Right mouse click
to close the polygon and return to Display 3D to view the
raypaths for the selected shots. |
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Shot/Bin Coverage Relationships: When working with the
3D bin maps you can now easily investigate the relationship
between shot location and reflection coverage. With the bin map
displayed, select the Shot-Ray Density icon to activate the
mouse for selecting shots or bins. With the left mouse button,
drag a rectangle to select a group of shots. The corresponding
bins will be highlighted in white. Using the right mouse
button, drag and select a group of bins. The corresponding
shots will be highlighted in white. |
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Faster 3D Array Display: Changes have been made to make
the loading and display of 3D shot and receiver arrays much
faster. |
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Manual Editing of 3D Source Arrays: It is
sometimes necessary to remove some of the shots from the regular
3D source array defined in VECON. An example would be to
account for shots skipped due to a river or cultural feature.
To delete shots from a 3D geometry, toggle on the
Geometry/Remove Shots pull-down command. The cursor is now
active for removing shots. Using the left mouse button, define
a polygon surrounding the shots to be removed. Double right
mouse click will close the polygon and delete the shots.
Additional polygons can be drawn if necessary. Toggle
Geometry/Remove Shots off to continue with the raytracing. |
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Generic ASCII Loader for 3D Geometry: A data
loader is now provided to load ASCII source and receiver files.
The only requirement is that the input files contain a single
shot or receiver coordinates per line. To open the
geometry-loading dialog, select the File/Import ASCII Geometry
file pull-down command. Enter the filename containing the
source locations, number of header lines to skip, and column
numbers for the X, Y and Z coordinates. Enter the same
parameters for the file containing the receiver locations. If
both the source and receiver coordinates are in the same file,
you can leave the receiver filename blank. This last option
assumes that there are the same number of shots and receivers. |
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Improved Workflow for 2D Model Builder Icons:
When working with the 2D Model Builder, you now move from one
icon function to another simply by clicking on the next function
you want to perform. You no longer need to select Cancel when
moving from on function to another. |
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Corrected Problem Writing Travel
Times to Headers: VECON writes the first arrival and
up to thirteen reflection travel times in the SEGY headers for
raytracing synthetics. If there were more than thirteen
reflections, VECON was overwriting the direct arrival time in
the headers. This problem has been corrected. |
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2D Reflection Fold of Coverage: For 2D
reflection raytracing you now display the reflection points
color-coded by the number of reflections. A new icon, On/Off
Fold Color Bar, has been added so the color bar scale can be
toggled between velocity and fold of coverage. The user can
also change the bin size and immediately see the new fold. |
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Fold Diagram: A histogram of the 2D fold for reflection
raytracing can now be generated. The Fold Diagram icon will
open a new window with the fold histogram for a single
reflector. The interfaces in the model are numbered
sequentially when the model is built and the reflecting
interface with the lowest sequential number will be displayed
first. Arrow buttons can be used to scroll through all the
reflectors that have been raytraced. The default horizontal
axis is set to include the entire model length. The user can
enter a minimum and maximum offset range to plot. The user can
also select the fold range to be used for the color bar. |
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2D Model Builder Display Changes: Two changes
have been made to assist users building 2D models from image
files. As the cursor is moved in either the image or the model
window, the cursor position is also displayed in the other
window. Also, the user can now select the color to use for
drawing the interfaces in the image window. This will make the
interfaces easy to interpret, regardless of the colors on the
image. To change the interface colors, select Display/Image
Layer Color to open the color palette to select the new line
color. If you Cancel from the color palette, the lines will be
color-coded using the velocity colors from the model. |
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Corrected Problem with Large Coordinate Values:
In some cases, 3D projects with seven digit coordinate values
would improperly interpolate layer depths. This problem has
been corrected. |
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Updated Documentation and Help: The User
Manual and on-line help files have been completely updated to
include all changes. |