vmed non-edit mode

vmed main. edit mode.
Example screen shots: non-edit mode.

MOUSE BUTTONS:

[LEFT] information at location of mouse click is given in top left info box

NOTE: holding down [A] while moving the mouse is equivalent to holding down the left mouse button (the latter does not actually work)

NOTE: when plotting vertical or horiz. gradients the value displayed in the info box when the left mouse button is clicked is the vertical or horiz. gradient at the mouse location

NOTE: when model is colorized, or when vertical or horizontal gradients are displayed, clicking left mouse on top of the scale bar toggles the scale bar limits from global min/max to min/max of the portion of the model displayed (i.e., when zoomed in).

KEYBOARD KEYS:

[SPACEBAR] redraws the screen

[a] zooms out and redraws [a]ll the entire model (if currently zoomed in).

[b] toggles plotting of vertical model [b]oundaries.

[c] toggles [c]olorization of the velocity model.
NOTE: clicking left mouse on top of the scale bar toggles the scale bar limits from global min/max to min/max of the portion of the model displayed (i.e., when zoomed in).

[C] plots (1) velocity contrast across each boundary; and (2) dip of each boundary in a separate panel below main plot.

[ctrl-c] toggles colorization of each layer as a solid color

[e] Enters [e]dit mode. Type [?] while in edit mode to get help on edit-mode key bindings.

[g] brings up buttons used to [g]rid and (crudely) contour the velocity model:

BUTTONS:
1) File type - click to toggle between binary and ascii binary files are written like this: ((v(i,j),j=1,nz),i=1,nx) where i and j are the x and y indices and nx and nz are the x- and z-dimensions of the output grid.
2) dx (km) - x-dimension of grid
3) dx (km) - z-dimension of grid
4) X mult - multiplier for x values (only relevant for ascii files)
5) Z mult - multiplier for z values (only relevant for ascii files)
6) V mult - mulitplier for velocity values BUTTONS for smoothing after gridding:
7) N smooth - number of smoothing passes of nsx X nsz moving averaging smoothing filter, where nsx and nsz are set in buttons 8 and 9:
8) X smoo size - x-dimension of smoothing operator (must be odd)
9) Z smoo size - z-dimension of smoothing operator (must be odd)
10) GRID - performs gridding and writes out files. If output file type is binary, output velocity file is "vmed.velb" and boundaries are output to ascii file "vmed.boundary". If output file type is ascii, output velocity file is "vmed.vela" and boundaries are output to ascii file "vmed.boundary".
11) CONTOUR - gridding is performed based on above settings, but no files are written. Contours are drawn on top of model.
12) CANCEL - closes the gridding buttons. Can also hit [Esc] or hit [g] again.

[h] toggles plotting of quasi-[h]orizontal model boundaries
[i] writes out detailed block [i]nformation. E.g.:

Layer 3 Block 7 Left X = 100.02 Right X = 107.82 Top Z = 0.87 Dip = 6.15 Top Z = 1.71 V1 = 5.00 V2 = 5.00 V3 = 6.40 V4 = 6.40 Bot. Z = 5.50 Dip = 0.00 Bot. Z = 5.50
[I] toggles plotting of [I]sovelocity contours using current grid settings (crude)
NOTE: very stupid. Regrids each time the model is redisplayed. So can be slow depending on grid settings.
[l] toggles drawing of [l]ayer and boundary numbers
[L] toggles reporting and plotting of (1) [l]ow-velocity zones; (2) negative vertical vel. gradients; and (3) crossing boundaries.
[n] toggles plotting boundary (depth) [n]odes
[o] zooms [o]ut by 100% (if currently zoomed in)
[p] brings up buttons to [p]rint to postscript file:

BUTTONS:
1) Orientation - click to toggle between landscape & portrait
2) Color/B&W - click to toggle between Color & greyscale
3) PRINT - click to save to a postscript file (vmed.ps)
NOTE: instead of clicking the PRINT button, you can automatically print by hitting [p] again.
4) CANCEL - to close these buttons. Can also hit [Esc] to close buttons.

[P] toggles highlighting of [P]inchouts
[q] [q]uits vmed
[r] [r]eloads current velocity model
[R] toggles colorization of model to highlight velocity variations within each layer
[s] change vertical [s]cale of plot: Bottom of plot will change to location of cursor when [s] is pressed.
[S] brings up buttons for changing the range of the color [S]calebar when plotting color velocity, vertical or horizontal gradient:

BUTTONS:
1) Minimum - set to minimum value of velocity or gradient
2) Maximum - set to maximum value of velocity or gradient
3) APPLY - Click to apply new limits (or hit ) Hit or [S] again to close the velocity range buttons.

[T] toggles on/off [T]itle (filename, vertical exaggeration, and date) at bottom of plot
[t] display vertical [t]wo-way traveltime at location of cursor in the top left info box
[v] toggles plotting of lower [v]elocity nodes
[V] toggles plotting of upper [V]elocity nodes
[z] [z]oom in: press and release left button, drag a rectangle, then press left button. Other buttons quit out of zoom mode
NOTE: Colorization of model will have flaws if you are zoomed in too much (because of round-off error).
NOTE: Dragging a zoom box around the color scalebar is another way to change scalebar range when plotting color velocity or horizontal or vertical gradient.
[Z] Maximum depth of plot is set to depth at the cursor location when [Z] is pressed
[1] overlays [1]-D velocity profiles at location of cursor
[2] displays model boundaries plotted versus twtt
[!] plot 1-D velocity profiles on separate pages
[*] toggles plotting of shot point locations
[_] toggles color display of horizontal velocity gradient
[|] toggles color display of vertical velocity gradient
[?] displays this help
vmed main. edit mode