mbm_grd3dplot(1)

NAME
mbm_grd3dplot - Create an executable shellscript which will generate a GMT 3D perspective plot of gridded data in a GMT grd file.

VERSION
Version 5.0

SYNOPSIS
mbm_grd3dplot -Ifile [-A[magnitude[/azimuth/elevation] -D[flipcolor/flipshade] -E[view_az/view_el] -Fexaggeration -Gcolor_mode -H -Kintensity_file -Ndrape_file -Oroot -Ppagesize -S[color/shade] -Uorientation -V -W[color_style[/palette[ncolors]] | cptfile] ] Additional Options:
[-Btickinfo -Jprojection[/scale | width] -Ltitle[:scale_label] -Mmisc -Q -Rw/e/s/n -X -Y -Zmin/max ] Miscellaneous Options:
[-MGDgmtdef/value -MGFscale_loc -MGL[f][x]lon0/lat0/slat/length[units][+llabel] -MGQdpi -MGSscalefactor -MGTx/y/size/angle/font/just/text -MGU[/dx/dy/][label] -MVMmesh_pen -MVN[null[/r/g/b]] ]

DESCRIPTION
mbm_grd3dplot is a macro to generate a shellscript of GMT commands which, when executed, will generate a 3D perspective Postscript plot of gridded data. Several styles of plots can be generated, including color fill views, color shaded relief views, mesh plot views, and text labels. Five different color schemes are included. The plot will be scaled to fit on the specified page size or, if the scale is user defined, the page size will be chosen in accordance with the plot size. The vertical exaggeration may be specified. The primary purpose of this macro is to allow the simple, semi-automated production of nice looking maps with a few command line arguments. For users seeking more control over the plot appearance, a number of additional optional arguments are provided. Truly ambitious users may edit the plot shellscript to take advantage of GMT capabilities not supported by this macro. The plot scripts generated by this macro will work with GMT version 5.0 and later, and are not compatible with earlier versions of GMT.

AUTHORSHIP
David W. Caress (caress@mbari.org)
  Monterey Bay Aquarium Research Institute
Dale N. Chayes (dale@ldeo.columbia.edu)
  Lamont-Doherty Earth Observatory

SIMPLE DESCRIPTION OF BASIC OPTIONS

-A  magnitude[/azimuth/elevation]
    Sets the parameters which control the synthetic illumination of the gridded data (shaded relief). The value magnitude is an effective vertical exageration which modulates the intensity of the shading; typical values are in the 0.1 to 10 range. The value azimuth is the azimuth in degrees from north from which the data is illuminated. The value elevation is the elevation of the illumination in degrees from horizontal. Defaults: magnitude = 0.2; azimuth = 0.0; elevation = 30.0;

-D  [flipcolor/flipshade]
    Normally, the color or grayscale tables used for color maps run from cool colors (or dark grays) for low grid values to hot colors (or light grays) for high grid values. This option reverses the color table so that cool colors (dark grays) correspond to high values and hot colors (light grays) to low values. If -D is given alone, it applies to the color table used for color or gray fill plots, shaded or unshaded. If the plot is to be shaded, either by synthetic illumination (-G2) or using an intensity file (-K and -G3 options), then setting flipshade = 1 will cause the shading convention to be reversed (e.g. high intensities overlaid as light shading). Using -D0/1 will flip the shading convention but leave the default color convention.

-E  [view_az/view_el]
    Sets the azimuth and elevation in degrees of the viewpoint for 3D perspective views. An view_az of 0 represents a view from the north, and view_az = 90 represents a view from the east. An view_el of 0 represents a horizontal view. Default: view_az = 200.; elevation = 40.

-F  [exaggeration]
    Sets the vertical exaggeration of the perspective plot. By default the vertical exaggeration is chosen so that the plot fits nicely on the page. This option works only if the data are in geographic coordinates (longitude and latitude).

-G  color_mode
    Turns on color fill plot and sets the style of the plot.
            color_mode = 1: 3D color/gray fill.
            color_mode = 2: 3D color/gray fill shaded by
                            synthetic illumination.
            color_mode = 3: 3D color/gray fill shaded by
                            an intensity file. The -K
                            option must be used to specify
                 the intensity file.
            color_mode = 4: 3D Color/gray fill of slope
                 magnitude.
            color_mode = 5: 3D Color/gray fill shaded by
                            slope magnitude.
            color_mode = 6: 3D mesh plot.
            color_mode = 7: 3D mesh plot with contours.

-H  This "help" flag cause the program to print out a description of its operation and then exit immediately.

-I  grdfile
    Sets the name of the gridded data file to be plotted. Alternatively, grdfile may be a list of grid files (one filename on each line) to be plotted together.

-K  intensity_file
    Sets the name of the gridded data file containing instensity values to be used for shading the map.

-N  drape_file
    Sets the name of the gridded data file to be draped on the relief provided by the file specified with the -I option. If -Ndrape_file is specified, then all color control options will apply to the data in \fIdrape_file.

-O  root
    Sets the root used to construct the filename of the output shellscript (root.cmd) and names of files created when the shellscript is run. Normally the name of the input grid file or grid file list is used as the root.

-P  pagesize
    This option sets the size of the page the plot will be centered on. If the user does not set the plot scale, the plot will be sized as large as will fit on the designated page. If the user sets the plot scale such that the plot will not fit on the designated page, a larger page will be used. The supported page sizes include ANSI A, B, C, D, E, F, and E1, as well as most metric page sizes. See the COMPLETE DESCRIPTION OF OPTIONS section below for a complete list of the supported page sizes. The default page size is A.

-S  [color/shade]
    This option enables effective histogram equalization of the color and/or shading of the gridded data. The equalization is not achieved by changing the data values, but rather by constructing the color or shading tables so that the boundaries in the tables encompass equal fractions of the datapoints. This serves to focus color or shading contrasts in value ranges corresponding to the bulk of the data values. If -S is given alone or with color = 1, it enables equalization of the color table used for color or gray fill plots, shaded or unshaded. If the plot is to be shaded, either by synthetic illumination (-G2) or using an intensity file (-K and -G3 options), then setting shade = 1 will cause the shading to be equalized. Using -S0/1 will equalize the shading without equalizing the color table.

-U  orientation
    Normally the orientation of the plot (portrait or landscape) is selected automatically so as to maximize the plot scale. The -U option allows the user to set the plot orientation. If orientation = 1, a portrait plot will be produced; if orientation = 2, a landscape plot will be produced.

-V  Causes mbm_grd3dplot to operate in "verbose" mode so that it outputs more information than usual.

-W  [color_style[/palette[ncolors]] | cptfile]
    This option controls the color scheme used for color fill plots. If color_style = 1 [default], then the color scheme used will be a continuous grading of colors. If color_style = 2, the color scheme will be a set of discrete color intervals. The color palette used is set using palette. Five palettes are available:
         palette = 1:    Haxby colors [default]
         palette = 2:    high Intensity colors
         palette = 3:    low Intensity colors
         palette = 4:    grayscale
         palette = 5:    uniform grayscale
    A complete description of the color palettes is given in the COMPLETE DESCRIPTION OF OPTIONS section below.
    The ncolors parameter sets the number of color values used in plotting, whether the colors are represented in a continuous color scale or a stepped, discrete color scale [default is 11]. If the option argument is the path to an existing GMT color palette (CPT) file, then that CPT file and its color scheme will be used for the plot

COMPLETE DESCRIPTION OF OPTIONS

-A  magnitude[/azimuth]
    Sets the parameters which control the synthetic illumination of the gridded data (shaded relief). The value magnitude is an effective vertical exageration which modulates the intensity of the shading; typical values are in the 0.1 to 0.5 range. The value azimuth is the azimuth from which the data is illuminated. Defaults: magnitude = 0.2; azimuth = 0.0;

-B  tickinfo
    Sets map boundary tickmark intervals. See the psbasemap manual page for details. By default the program chooses basemap annotations based on the map boundaries.

-D  [flipcolor/flipshade]
    Normally, the color or grayscale tables used for color maps run from cool colors (or dark grays) for low grid values to hot colors (or light grays) for high grid values. This option reverses the color table so that cool colors (dark grays) correspond to high values and hot colors (light grays) to low values. If -D is given alone, it applies to the color table used for color or gray fill plots, shaded or unshaded. If the plot is to be shaded, either by synthetic illumination (-G2) or using an intensity file (-K and -G3 options), then setting flipshade = 1 will cause the shading convention to be reversed (e.g. high intensities overlaid as light shading). Using -D0/1 will flip the shading convention but leave the default color convention.

-E  [view_az/view_el]
    Sets the azimuth and elevation in degrees of the viewpoint for 3D perspective views. An view_az of 0 represents a view from the north, and view_az = 90 represents a view from the east. An view_el of 0 represents a horizontal view. Default: view_az = 200.; elevation = 40.

-G  color_mode
    Turns on color fill plot and sets the style of the plot.
            color_mode = 1: 3D color/gray fill.
            color_mode = 2: 3D color/gray fill shaded by
                            synthetic illumination.
            color_mode = 3: 3D color/gray fill shaded by
                            an intensity file. The -K
                            option must be used to specify
                 the intensity file.
            color_mode = 4: 3D Color/gray fill of slope
                 magnitude.
            color_mode = 5: 3D Color/gray fill shaded by
                            slope magnitude.
            color_mode = 6: 3D mesh plot.
            color_mode = 7: 3D mesh plot with contours.
    See the grdimage manual page for information on shading with intensity files

-H  This "help" flag cause the program to print out a description of its operation and then exit immediately.

-I  grdfile
    Sets the name of the gridded data file to be plotted. The data must be in a form acceptable to GMT version 3 programs (see the GMT Cookbook & Technical Reference).

-J  projection[/scale | /width]
    Selects the map projection. By default the map projection is Mercator and the plot scale is chosen to fit on the selected page size (see -P option). The user may specify a different projection to be used, in which case the plot scale is still automatically chosen to fit the page. The user may also specify both the projection and the plot scale. If the projection specifying character is upper case, a plot width rather than a plot scale is used. The scale values are specified in inch/degree or in 1:xxxxx ratios. Plot widths are specified in inches. If the user specifies a plot scale such that the plot will not fit on the default A size page, a appropriately larger page size will be chosen.

    CYLINDRICAL PROJECTIONS:

    -Jclon0/lat0/scale (Cassini)
    -Jmscale (Mercator)
    -Joalon0/lat0/azimuth/scale (Oblique Mercator - point and azimuth)
    -Joblon0/lat0/lon1/lat1/scale (Oblique Mercator - two points)
    -Joclon0/lat0/lonp/latp/scale (Oblique Mercator - point and pole)
    -Jqlon0/scale (Equidistant Cylindrical Projection (Plate Carree))
    -Jtlon0/scale (TM - Transverse Mercator)
    -Juzone/scale (UTM - Universal Transverse Mercator)
    -Jylon0/lats/scale (Basic Cylindrical Projection)

    AZIMUTHAL PROJECTIONS:

    -Jalon0/lat0/scale (Lambert).
    -Jelon0/lat0/scale (Equidistant).
    -Jglon0/lat0/scale (Orthographic).
    -Jslon0/lat0/scale (General Stereographic)

    CONIC PROJECTIONS:

    -Jblon0/lat0/lat1/lat2/scale (Albers)
    -Jllon0/lat0/lat1/lat2/scale (Lambert)

    MISCELLANEOUS PROJECTIONS:

    -Jhlon0/scale (Hammer)
    -Jilon0/scale (Sinusoidal)
    -Jklon0/scale (Eckert VI)
    -Jnlon0/scale (Robinson)
    -Jrlon0/scale (Winkel Tripel)
    -Jwlon0/scale (Mollweide)

    NON-GEOGRAPHICAL PROJECTIONS:

    -Jpscale (Linear projection for polar (theta,r) coordinates)
    -Jxx-scale[l|ppow][/y-scale[l|ppow]] (Linear, log, and power scaling)
    More details can be found in the psbasemap manpages.

-K  intensity_file
    Sets the name of the gridded data file containing instensity values to be used for shading the map.

-L  title:scalelabel
    Sets the title and the label for the colorscale (if used) of the plot. Note that a colon (:) rather than a slash (/) is used to separate the labels. Colons cannot be used in the labels themselves. If this option is not used, then a default title and colorscale label are provided. If the title is supplied alone, a default colorscale label will be provided. To force no title use -L" "; to force no title or colorscale label use -L" : ".

-M  A series of "miscellaneous" options are provided which are given as -M followed by a two character identifier, followed by any other parameters associated with that option. The -M options may be strung together separated by colons, e.g. "-MGQ100:GU", which is equivalent to "-MGQ -MGU".

-N  drape_file
    Sets the name of the gridded data file to be draped on the relief provided by the file specified with the -I option. If -Ndrape_file is specified, then all color control options will apply to the data in \fIdrape_file.

-MGD
    gmtdef/value
    Allows the user to set the GMT default values used as the plot is constructed. This command may be given repeatedly to set as many GMT defaults as required. For example, to set the basemap annotation font to Courier, use "-MGDANOT_FONT/Courier".

-MGF
    scale_loc
    Sets the location of the color scale. The possible values of scale_loc are:
         scale_loc = b:    bottom of plot
         scale_loc = t:    top of plot
         scale_loc = l:    left of plot
         scale_loc = r:    right of plot
    [Default scale_loc = b]

-MGL
    [f][x]lon0/lat0/slat/length[units][+llabel]
    Draws a simple map scale centered on lon0/lat0. Use -Lf to get a "fancy" scale [Default is plain]. Use -Lx to specify the position in inches instead of map units. The scale is calculated at latitude slat; if the string "center" is used instead of a numerical value for slat, then the macro will set the scaling according to the center of the plot bounds. The scale length value length is in km by default, but the units can be specified as one of e|f|k|M|n|u, where e = meters, f = feet, k = kilometers, M = statue miles, n = nautical miles, and u = US survey feet. Append +l to label the scale with the relevant units, or append +l"label" to set a different label string.

-MGQ
    dpi
    Sets the resolution in dots per inch of the raster image used for color fill maps. Larger values of dpi produce larger Postscript plot files. [Default is 100].

-MGS
    scalefactor
    The gridded data is multiplied by scalefactor. This option is most often used flip the sign of the data (scalefactor = -1). [Default no scaling]

-MGT
    x/y/size/angle/font/just/text
    Causes a text label to plotted on the map. size is text size in points, angle is measured in degrees counter-clockwise from horizontal, fontno sets the font type, justify sets the alignment. If fontno starts with a leading hyphen, then the remainder of fontno is taken to be a textstring with the desired fontname. See the gmtdefaults man page for names and numbers of available fonts (or run pstext -L). The alignment number refers to the part of the textstring that will be mapped onto the (x,y) point: 1 = Lower Left corner, 2 = Lower Center, 3 = Lower Right, 5 = Mid Left, 6 = Mid Center, 7 = Mid Right, 9 = Upper Left, 10 = Upper Center, 11 = Upper Right. This option may be given as many times as needed.

-MGU
    [/dx/dy/][label]
    Draw Unix System time stamp on plot. User may specify where the lower left corner of the stamp should fall on the page relative to lower left corner of plot in inch [Default is (-0.75,-0.75)]. Optionally, append a label, or c (which will plot the command string.)

-MVM
    mesh_pen
    Set pen attributes for mesh plot. The mesh plot must be specified with the -G option. See chapter 4.12 in the GMT Technical reference for a discussion of GMT pen values. [Defaults: width = 1, color = 0/0/0, texture = solid].

-MVN
    [null[/r/g/b]]
    Draws a plane at the level of the null value (with respect to the data in the grid file specified with the -I option. If the optional r/g/b is provided, the frontal facade between the plane and the data perimeter is filled with this color. If -MVN is given by itself, then mbm_grd3dplot causes the null plane to be drawn at the minimum z-level and the facade to be colored a light gray (r=g=b=200).

-O  root
    Sets the root used to construct the filename of the output shellscript (root.cmd) and names of files created when the shellscript is run. Normally the name of the input grid file or grid file list is used as the root.

-P  pagesize
    This option sets the size of the page the plot will be centered on. If the user does not set the plot scale, the plot will be sized as large as will fit on the designated page. If the user sets the plot scale such that the plot will not fit on the designated page, a larger page will be used. The supported page sizes are:
              American ANSI sizes:
              A 8.5 x 11.0 in. ( 215.9 x 279.4 mm)
              B 11.0 x 17.0 in. ( 279.4 x 431.8 mm)
              C 17.0 x 22.0 in. ( 431.8 x 558.8 mm)
              D 22.0 x 34.0 in. ( 558.8 x 863.6 mm)
              E 34.0 x 44.0 in. ( 863.6 x 1117.6 mm)
              F 28.0 x 40.0 in. ( 711.2 x 1016.0 mm)
              E1 44.0 x 68.0 in. (1117.6 x 1727.2 mm)
              Metric ISO A sizes:
              A0 841.0 x 1189.0 mm (33.11 x 46.81 in.)
              A1 594.0 x 841.0 mm (23.39 x 33.11 in.)
              A2 420.0 x 594.0 mm (16.54 x 23.39 in.)
              A3 297.0 x 420.0 mm (11.69 x 16.54 in.)
              A4 210.0 x 297.0 mm ( 8.27 x 11.69 in.)
              A5 148.0 x 210.0 mm ( 5.83 x 8.27 in.)
              A6 105.0 x 148.0 mm ( 4.13 x 5.83 in.)
              A7 74.0 x 105.0 mm ( 2.91 x 4.13 in.)
              A8 52.0 x 74.0 mm ( 2.05 x 2.91 in.)
              A9 37.0 x 52.0 mm ( 1.46 x 2.05 in.)
              A10 26.0 x 37.0 mm ( 1.02 x 1.46 in.)
              Metric ISO B sizes:
              B0 1000.0x 1414.0 mm (39.37 x 55.67 in.)
              B1 707.0 x 1000.0 mm (27.83 x 39.37 in.)
              B2 500.0 x 707.0 mm (19.68 x 27.83 in.)
              B3 353.0 x 500.0 mm (13.90 x 19.68 in.)
              B4 250.0 x 353.0 mm ( 9.84 x 13.90 in.)
              B5 176.0 x 250.0 mm ( 6.93 x 9.84 in.)
              B6 125.0 x 176.0 mm ( 4.92 x 6.93 in.)
              B7 88.0 x 125.0 mm ( 3.46 x 4.92 in.)
              B8 62.0 x 88.0 mm ( 2.44 x 3.46 in.)
              B9 44.0 x 62.0 mm ( 1.73 x 2.44 in.)
              B10 31.0 x 44.0 mm ( 1.22 x 1.73 in.)
              Metric ISO C sizes:
              C0 914.4 x 1300.5 mm (36.00 x 51.20 in.)
              C1 650.2 x 914.4 mm (25.60 x 36.00 in.)
              C2 457.2 x 650.2 mm (18.00 x 25.60 in.)
              C3 325.1 x 457.2 mm (12.80 x 18.00 in.)
              C4 228.6 x 325.1 mm ( 9.00 x 12.80 in.)
              C5 162.6 x 228.6 mm ( 6.40 x 9.00 in.)
              C6 114.3 x 162.6 mm ( 4.50 x 6.40 in.)
              C7 81.3 x 114.3 mm ( 3.20 x 4.50 in.)
          MB-System large format sizes:
              m1 1371.6 x 1828.8 mm (54.00 x 72.00 in.)
              m2 1371.6 x 2133.6 mm (54.00 x 84.00 in.)
              m3 1371.6 x 2438.4 mm (54.00 x 96.00 in.)
              m4 1524.0 x 1828.8 mm (60.00 x 72.00 in.)
              m5 1524.0 x 2133.6 mm (60.00 x 84.00 in.)
              m6 1524.0 x 2438.4 mm (60.00 x 96.00 in.) The default page size is A.

-Q  Normally, the output plot generation shellscript includes lines which execute a program to display the Postscript image on the screen. This option causes those lines to be commented out so that executing the shellscript produces a Postscript plot but does not attempt to display it on the screen. The program to be used to display the Postscript is set using mbdefaults; the default value can be overridden by setting the environment variable $MB_PS_VIEWER.

-R  west/east/south/north
    west, east, south, and north specify the Region of interest. To specify boundaries in degrees and minutes [and seconds], use the dd:mm[:ss] format. Append r if lower left and upper right map coordinates are given instead of wesn. You may ask for a larger w/e/s/n region to have more room between the image and the axes. A smaller region than specified in the grdfile will result in a subset of the grid [Default is region given by the grdfile].

-S  [color/shade]
    This option enables effective histogram equalization of the color and/or shading of the gridded data. The equalization is not achieved by changing the data values, but rather by constructing the color or shading tables so that the boundaries in the tables encompass equal fractions of the datapoints. This serves to focus color or shading contrasts in value ranges corresponding to the bulk of the data values. If -S is given alone or with color = 1, it enables equalization of the color table used for color or gray fill plots, shaded or unshaded. If the plot is to be shaded, either by synthetic illumination (-G2) or using an intensity file (-K and -G3 options), then setting shade = 1 will cause the shading to be equalized. Using -S0/1 will equalize the shading without equalizing the color table.

-U  orientation
    Normally the orientation of the plot (portrait or landscape) is selected automatically so as to maximize the plot scale. The -U option allows the user to set the plot orientation. If orientation = 1, a portrait plot will be produced; if orientation = 2, a landscape plot will be produced.

-W  [color_style[/palette[ncolors]] | cptfile]
    This option controls the color scheme used for color fill plots. If color_style = 1 [default], then the color scheme used will be a continuous grading of colors. If color_style = 2, the color scheme will be a set of discrete color intervals. The color palette used is set using palette. Seven palettes are available:
         palette = 1:    Haxby colors [default]
         palette = 2:    high Intensity colors
         palette = 3:    low Intensity colors
         palette = 4:    grayscale
         palette = 5:    uniform grayscale
         palette = 6:    uniform black
         palette = 7:    uniform white
    The RGB definitions of the color palettes are: color palette 1 - Haxby Color Table
      red: 255 255 255 255 240 205 138 106 50 40 37
      green: 255 186 161 189 236 255 236 235 190 127 57
      blue: 255 133 68 87 121 162 174 255 255 251 175 color palette 2 - High Intensity Colors
      red: 255 255 255 255 128 0 0 0 0 128 255
      green: 0 64 128 255 255 255 255 128 0 0 0
      blue: 0 0 0 0 0 0 255 255 255 255 255 color palette 3 - Low Intensity Colors
      red: 200 194 179 141 90 0 0 0 0 90 141
      green: 0 49 90 141 179 200 141 90 0 0 0
      blue: 0 0 0 0 0 0 141 179 200 179 141 color palette 4 - Grayscale
      red: 255 230 204 179 153 128 102 77 51 26 0
      green: 255 230 204 179 153 128 102 77 51 26 0
      blue: 255 230 204 179 153 128 102 77 51 26 0 color palette 5 - Uniform Grayscale
      red: 128 128 128 128 128 128 128 128 128 128 128
      green: 128 128 128 128 128 128 128 128 128 128 128
      blue: 128 128 128 128 128 128 128 128 128 128 128 color palette 6 - Uniform Black
      red: 0 0 0 0 0 0 0 0 0 0 0
      green: 0 0 0 0 0 0 0 0 0 0 0
      blue: 0 0 0 0 0 0 0 0 0 0 0 color palette 7 - Uniform White
      red: 255 255 255 255 255 255 255 255 255 255 255
      green: 255 255 255 255 255 255 255 255 255 255 255
      blue: 255 255 255 255 255 255 255 255 255 255 255 The Haxby colors have been adapted from a palette developed by Dr. William Haxby of the Lamont-Doherty Earth Observatory; this palette is pleasing to the eye and well suited for shading. The high intensity colors describe linear paths through RGB space from red to blue to green to purple; because the colors are high intensity they are not well suited to shading. The low intensity colors are similar to the high intensity, but muted and thus well suited to shading. The grayscale palette runs linearly from white to black and is commonly used for plots of sidescan and amplitude data. The uniform grayscale is useful for non-color shaded relief plots. The ncolors parameter sets the number of color values used in plotting, whether the colors are represented in a continuous color scale or a stepped, discrete color scale [default is 11]. If the option argument is the path to an existing GMT color palette (CPT) file, then that CPT file and its color scheme will be used for the plot

-V  Causes mbm_grd3dplot to operate in "verbose" mode so that it outputs more information than usual.

-X  Normally, mbm_grd3dplot creates an executable shellscript and then exits. This option will cause the shellscript to be executed in the background before mbm_grd3dplot exits.

-Y  Normally, mbm_grd3dplot generates nicely rounded numbers for the boundaries of the color palette. Often, the resulting color bounds extend well outside the range of the gridded data. This option causes the color boundaries to be uniformly distributed between the minimum and maximum values of the grid.

-Z  min/max
    This option overrides the minimum and maximum values of the gridded data, affecting the color palette and the contour interval if those parameters are not specified by the user.

EXAMPLES
Suppose we have obtained two GRD files with dimensions of 127 by 194, one containing gridded bathymetry (grd_sb2112_example_bath) and the other gridded sidescan (grd_sb2112_example_ss). In order to generate a shellscript which will in turn generate a 3D color shaded relief view of the bathymetry, we use the -G2 option. The grid file is in bathymetry (positive down) rather in topography (positive up), so the bathymetry needs to be rescaled by multiplying by -1 (-MGS-1). We choose an illumination magnitude of 0.4 and an illumination azimuth of 45 degrees (-A0.4/45). We also choose a perspective azimuth of 250 degrees and an elevation of 30 degrees (-E240/30):
      mbm_grd3dplot -Igrd_sb2112_example_bath \
          -G2 -A0.4/45 -E250/30 -MGS-1 -X -V \
          -Osb2112_example_bath3d Now, to generate a 3D perspective view of the gridded bathymetry shaded using the gridded sidescan data, we use the -G3 and -K options. We want the sidescan data to be histogram equalized, so we use -S0/1. We also want the shading to be more prominent than the default shading magnitude of 0.2 would produce, so we use -A0.5:
      mbm_grd3dplot -Igrd_sb2112_example_bath \
          -Kgrd_sb2112_example_ss \
          -G3 -A0.5 -E250/30 -D0/1 \
          -S0/1 -MGS-1 -X -V \
          -Osb2112_example_bathss3d The first example produces and executes a plot generation shellscript called sb2112_example_bath3d.cmd and the second produces a shellscript called sb2112_example_bathss3d.cmd. As an example, the contents of the plotting shellscript "sb2112_example_bathss3d.cmd" are:
 #
 # Shellscript to create Postscript plot of data in grd file
 # Created by macro mbm_grd3dplot
 #
 # This shellscript created by following command line:
 # mbm_grd3dplot -Igrd_sb2112_example_bath \
 # -Kgrd_sb2112_example_ss -G3 -A0.5 \
 # -E250/30 -D0/1 -S0/1 -MGS-1 -X -V \
 # -Osb2112_example_bathss3d
 #
 # Save existing GMT defaults
 echo Saving GMT defaults...
 gmtdefaults -L > gmtdefaults$$
 #
 # Set new GMT defaults
 echo Setting new GMT defaults...
 gmtset ANOT_FONT Helvetica
 gmtset LABEL_FONT Helvetica
 gmtset HEADER_FONT Helvetica
 gmtset ANOT_FONT_SIZE 8
 gmtset LABEL_FONT_SIZE 8
 gmtset HEADER_FONT_SIZE 10
 gmtset FRAME_WIDTH 0.074999999999999997
 gmtset TICK_LENGTH 0.074999999999999997
 gmtset PAGE_ORIENTATION LANDSCAPE
 gmtset COLOR_BACKGROUND 0/0/0
 gmtset COLOR_FOREGROUND 255/255/255
 gmtset COLOR_NAN 255/255/255
 #
 # Make color palette table file
 echo Making color palette table file...
 echo -4500 37 57 175 -4350 40 127 251 > \
     sb2112_example_bathss3d.cpt
 echo -4350 40 127 251 -4200 50 190 255 >> \
     sb2112_example_bathss3d.cpt
 echo -4200 50 190 255 -4050 106 235 255 >> \
     sb2112_example_bathss3d.cpt
 echo -4050 106 235 255 -3900 138 236 174 >> \
     sb2112_example_bathss3d.cpt
 echo -3900 138 236 174 -3750 205 255 162 >> \
     sb2112_example_bathss3d.cpt
 echo -3750 205 255 162 -3600 240 236 121 >> \
     sb2112_example_bathss3d.cpt
 echo -3600 240 236 121 -3450 255 189 87 >> \
     sb2112_example_bathss3d.cpt
 echo -3450 255 189 87 -3300 255 161 68 >> \
     sb2112_example_bathss3d.cpt
 echo -3300 255 161 68 -3150 255 186 133 >> \
     sb2112_example_bathss3d.cpt
 echo -3150 255 186 133 -3000 255 255 255 >> \
     sb2112_example_bathss3d.cpt
 #
 # Rescale data
 echo Rescaling data by -1...
 echo Running grdmath...
 grdmath grd_sb2112_example_bath -1 x = \
     grd_sb2112_example_bath.scale
 #
 # Get shading array
 echo Getting shading array...
 echo Running grdhisteq...
 grdhisteq grd_sb2112_example_ss \
     -Ggrd_sb2112_example_ss.eq -N
 echo Running grdmath...
 grdmath grd_sb2112_example_ss.eq -0.5 x \
     = grd_sb2112_example_ss.int
 rm -f grd_sb2112_example_ss.eq
 #
 # Make 3D view
 echo Running grdview...
 grdview grd_sb2112_example_bath.scale \
     -Jm13.678801784792578 \
     -Jz0.0014760910157720331 \
     -E250/30 \
     -R114.221/114.421/-31.9001/-31.6377 \
     -Csb2112_example_bathss3d.cpt \
     -N-4499.4399999999996/200/200/200 \
     -Igrd_sb2112_example_ss.int \
     -Qi \
     -P -X1.8081565710006675 -Y2 -K -V \
     > sb2112_example_bathss3d.ps
 #
 # Make color scale
 echo Running psscale...
 psscale -Csb2112_example_bathss3d.cpt \
     -D2.4418/-0.5000/4.8837/0.1500h \
      -B":.Data Values:" \
     -P -K -O -V >> sb2112_example_bathss3d.ps
 #
 # Make basemap
 echo Running psbasemap...
 psbasemap -Jm13.678801784792578 \
     -Jz0.0014760910157720331 \
     -E250/30 \
     -R114.221/114.421/-31.9001/-31.6377 \
     -B5m/5m:."Data File grd_sb2112_example_bath":WSZ \
     -P -O -V >> sb2112_example_bathss3d.ps
 #
 # Delete surplus files
 echo Deleting surplus files...
 rm -f sb2112_example_bathss3d.cpt
 rm -f grd_sb2112_example_bath.scale
 #
 # Reset GMT default fonts
 echo Resetting GMT fonts...
 mv gmtdefaults$$ .gmtdefaults
 #
 # Run xpsview
 echo Running xpsview in background...
 xpsview -ps a -maxp 4m sb2112_example_bathss3d.ps &
 #
 # All done!
 echo All done!

SEE ALSO
grdimage(1), grdcontour(1), mbdefaults(1), mbgrid(1), mbsystem(1), mbm_grd3dplot(1), mbm_plot(1), psbasemap(1), pstext(1), psxy(1)

BUGS
By making this macro more useful, we have also made it more complex.