The range submenu is accessed by typing "r" on top of the graphics screen. Use these buttons select the offset range ("X min" and "X max"), time range ("T min" and "T max"), azimuth range ("Az min" and "Az max"), sequential trace number range ("First trace" and "Last trace"), receiver number range ("min tnofr" and "max tnofr"), shot number range ("min espn" and "max espn"), and maximum number of trace to plot ("Max traces").
The scale submenu is accessed by typing "s" on top of the graphics screen. Use these buttons to adjust the horizontal and vertical scale ("X scale" and "Y scale"), and to set the size of the inset map ("map len mm"). A value of "auto" for one of the scale values means that zp2 will choose an appropriate scale so that the plot fits nicely within the device's page size.
The print submenu is accessed by typing "t" on top of the graphics
screen (sorry, but "p" is reserved for entering pick mode!).
Use these buttons to select the page orientation ("Orientation"),
and set whether the image will be black & white or color ("Color/b&2").
Clicking on the "PRINT" button creates a postcript plot of the data
using PGPLOT's postscript drivers.
Clicking on the "Create GMT files" button creates a set of GMT data
files and a c shell script file that can be executed to create a
postscript plot of the data using GMT.
The "Plot info" button toggles on/off the writing of key plotting
parameters down the right side of a postcript plot.
Click here to download a sample zp postscript
file (gzipped, 170 kb).
The mute submenu is accessed by typing "m" on top of the graphics
screen. Use these buttons to select the type of mute ("Mute type"),
create mutes (by clicking on the "Create" button, and then using
the mouse to define the region to be muted), delete all mutes ("Delete ALL"),
delete or undelete mutes for a specified range of traces
(click on "Delete RANGE" and then use the mouse to specify the
range of traces to be muted or unmuted). The "Mute" button can be
toggled on/off to specify whether all mutes should be applied ("on") or
not applied ("off"). Mutes can be saved by
clicking on the "SAVE" button. Mutes are save in a separate mute
file called "filename.mute", where "filename.head" is the name of the
zp2 header file corresponding to the segyfile you are viewing.
This image shows examples of the different
mute types.
The kill submenu is accessed by typing "k" on top of the graphics
screen. Use these buttons to turn off/on the plotting of traces
that have been marked as killed ("Visible"), kill or unkill
a range of traces according to the setting of the "Range" button by
clicking on the "Select RANGE" button and using the mouse to select
a range of traces. The flags which mark a trace as killed can all
be deleted by clicking the "DELETE ALL" button. Kills can be
saved by clicking the "SAVE" button. The flag for marking a trace
as killed is written in the zp2 header file.
This image shows an example of killed traces.
The annotation submenu is accessed by typing "l" (for "labels") on
top of the graphics screen. Use these buttons to select the value
that will be used to annotate a trace at the top of the plot (e.g.,
trace number, shot number, receiver number, etc.) ("anno word"), set
the annotation interval ("anno int") and annotation text size
("anno (mm)"). You can also change the axis label annotation size
("axlab (mm)"), change the position of plot title ("Title pos.")
and modify the x and y axis labels and plot title. The label/title
indicated in the "Edit-->" button is shown in the large text box
next to this button. If this button is set to "default", zp2 will
use a default label. The text in this button can be modified
by placing the cursor in this box and typing.
The gather submenu is accessed by typing "g" on top of the graphics screen.
Use these buttons to expedite plotting a common offset gather.
For these buttons to be of any use, your SEGY file must be comprised
of successive shot or receiver gathers. E.g., if your file comprises
successive shot gathers, each with 240 channels, and you wanted to
plot a common offset (i.e., receiver) gather, you would set the
"Channel #" button to the desired channel. The "Max. chan." button
should be set to the number of channels per gather. Clicking "DONE"
will automatically change some of the plotting parameters so that,
after closing the gather submenu and hitting the spacebar, the
selected gather will be plotted.
This submenu can generally be ignored for typical wide-angle data, i.e.,
segy files which comprise a single shot or receiver gather.
And here is the equivalent plot created
using GMT (i.e., clicking on the "Create GMT files" button then
runnning the csh script file called zp_gmt.csh. (gzipped, 200 kb).
Type a carriage return to signal end of string.
Type a "backspace" or "del" to delete character to the left
A number of emacs-like editing functions are available to make modifying the
current value easier:
ctrl-x deletes the entire string
ctrl-d deletes character to the right
ctrl-z changes the string back to it's inital value
ctrl-a moves insertion point to beginning of string
ctrl-e moves insertion point to end of string
ctrl-f moves insertion point one point to the right
ctrl-b moves insertion point one point to the left
ctrl-k deletes everything to the right of the insertion point
Do not click the mouse button in this box, as this will generate
a "A", "D" or "X" character depending on whether the left, center or right
mouse button is clicked, respectively.
