psimage(1gmt)
NAME
psimage - Place images or EPS files on maps
SYNOPSIS
psimage imagefile [ -Drefpoint ] [ -Fbox ] [ -G[b|f|t]color ] [ -I ] [ -Jparameters ] [ -Jz|Zparameters ] [ -K ] [ -M ] [ -O ] [ -P ] [ -Rwest/east/south/north[/zmin/zmax][r] ] [ -U[stamp] ] [ -V[level] ] [ -Xx_offset ] [ -Yy_offset ] [ -ccopies ] [ -pflags ] [ -ttransp ] Note: No space is allowed between the option flag and the associated arguments.
DESCRIPTION
psimage reads an Encapsulated PostScript file or a raster image file and plots it on a map. The image can be scaled arbitrarily, and 1-bit raster images can be (1) inverted, i.e., black pixels (on) becomes white (off) and vice versa, or (2) colorized, by assigning different foreground and background colors, and (3) made transparent where one of back- or foreground is painted only. As an option, the user may choose to convert colored raster images to grayscale using TV's YIQ-transformation. For raster files, the user can select which color to be made transparent. The user may also choose to replicate the image which, when preceded by appropriate clip paths, may allow larger custom-designed fill patterns to be implemented (the -Gp mechanism offered in most GMT programs is limited to rasters smaller than 146 by 146).
REQUIRED ARGUMENTS
imagefile
This must be an Encapsulated PostScript (EPS) file or a raster
image. An EPS file must contain an appropriate BoundingBox. A
raster file can have a depth of 1, 8, 24, or 32 bits and is read
via GDAL. Note: If GDAL was not configured during GMT
installation then only Sun raster files are supported natively.
You must then convert other formats to Sun raster files before
use.
OPTIONAL ARGUMENTS
-D[g|j|J|n|x]refpoint+rdpi+w[-]width[/height][+jjustify][+nnx[/ny]
][+odx[/dy]]
Sets reference point on the map for the image using one of four
coordinate systems: (1) Use -Dg for map (user) coordinates, (2)
use -Dj or -DJ for setting refpoint via a 2-char justification
code that refers to the (invisible) map domain rectangle, (3)
use -Dn for normalized (0-1) coordinates, or (4) use -Dx for
plot coordinates (inches, cm, etc.). All but -Dx requires both
-R and -J to be specified. By default, the anchor point on the
scale is assumed to be the bottom left corner (BL), but this can
be changed by appending +j followed by a 2-char justification
code justify (see pstext). Note: If -Dj is used then justify
defaults to the same as refpoint, if -DJ is used then justify
defaults to the mirror opposite of refpoint. Add +o to offset
the color scale by dx/dy away from the refpoint point in the
direction implied by justify (or the direction implied by -Dj or
-DJ). Specify image size in one of two ways: Use +rdpi to set
the dpi of the image in dots per inch, or use
+w[-]width[/height] to set the width (and height) of the image
in plot coordinates (inches, cm, etc.). If height is not given,
the original aspect ratio of the image is maintained. If width
is negative we use the absolute value and interpolate image to
the device resolution using the PostScript image operator.
Optionally, use +nnx[/ny] to replicate the image nx times
horizontally and ny times vertically. If ny is omitted, it will
be identical to nx [Default is 1/1].
-F[+cclearances][+gfill][+i[[gap/]pen]][+p[pen]][+r[radius]][+s[[dx/dy/][shade]]]
Without further options, draws a rectangular border around the
image using MAP_FRAME_PEN; specify a different pen with +ppen.
Add +gfill to fill the image box [no fill]. Append +cclearance
where clearance is either gap, xgap/ygap, or lgap/rgap/bgap/tgap
where these items are uniform, separate in x- and y-direction,
or individual side spacings between scale and border. Append +i
to draw a secondary, inner border as well. We use a uniform gap
between borders of 2p and the MAP_DEFAULTS_PEN unless other
values are specified. Append +r to draw rounded rectangular
borders instead, with a 6p corner radius. You can override this
radius by appending another value. Finally, append +s to draw an
offset background shaded region. Here, dx/dy indicates the shift
relative to the foreground frame [4p/-4p] and shade sets the
fill style to use for shading [gray50].
-Jparameters (more ...)
Select map projection. (Used only with -p)
-Jz|Zparameters (more ...)
Set z-axis scaling; same syntax as -Jx.
-K (more ...)
Do not finalize the PostScript plot.
-M Convert color image to monochrome grayshades using the
(television) YIQ-transformation.
-O (more ...)
Append to existing PostScript plot.
-P (more ...)
Select "Portrait" plot orientation.
-R[unit]xmin/xmax/ymin/ymax[r] (more ...)
Specify the region of interest. (Used only with -p)
For perspective view p, optionally append /zmin/zmax. (more ...)
-U[just/dx/dy/][c|label] (more ...)
Draw GMT time stamp logo on plot.
-V[level] (more ...)
Select verbosity level [c].
-X[a|c|f|r][x-shift[u]]
-Y[a|c|f|r][y-shift[u]] (more ...)
Shift plot origin.
-ccopies (more ...)
Specify number of plot copies [Default is 1].
These options are for 1-bit images only. They have no effect when
plotting other images or PostScript files.
-G[b|f|t]color
-Gb Sets background color (replace white pixel) of 1-bit
images. Use - for transparency (and set -Gf to the
desired color).
-Gf Sets foreground color (replace black pixel) of 1-bit
images. Use - for transparency (and set -Gb to the
desired color).
-I Invert 1-bit image before plotting. This is what is done
when you use -GP in other GMT programs.
These options are for 8-, 24-, and 32-bit raster images only. They have
no effect when plotting 1-bit images or PostScript files.
-Gt Assigns the color that is to be made transparent. Sun Raster
files do not support transparency, so indicate here which color
to be made transparent.
-p[x|y|z]azim/elev[/zlevel][+wlon0/lat0[/z0]][+vx0/y0] (more ...)
Select perspective view. (Requires -R and -J for proper
functioning).
-t[transp] (more ...)
Set PDF transparency level in percent.
-^ or just -
Print a short message about the syntax of the command, then
exits (NOTE: on Windows use just -).
-+ or just +
Print an extensive usage (help) message, including the
explanation of any module-specific option (but not the GMT
common options), then exits.
-? or no arguments
Print a complete usage (help) message, including the explanation
of options, then exits.
gmt, pslegend, To plot the image logo.jpg, scaling it be 1 inch wide
(height is scaled accordingly), and outline with a thin, blue pen, use
gmt psimage logo.jpg -Dx0/0+w1i -F+pthin,blue > image.ps
To include an Encapsulated PostScript file tiger.eps with its upper
right corner 2 inch to the right and 1 inch up from the current
location, and have its width scaled to 3 inches, while keeping the
aspect ratio, use
gmt psimage tiger.eps -Dx2i/1i+jTR+w3i > image.ps
To replicate the 1-bit raster image template 1_bit.ras, colorize it
(brown background and red foreground), and setting each of 5 by 5 tiles
to be 1 cm wide, use
gmt psimage 1_bit.ras -Gbbrown -Gfred -Dx0/0+w1c+n5 > image.ps
SEE ALSO
gmt, gmtcolors, gmtlogo pslegend, psscale psxy, convert(1)
COPYRIGHT
2016, P. Wessel, W. H. F. Smith, R. Scharroo, J. Luis, and F. Wobbe
Opportunity
Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.
Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.
Free Software
Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.
Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.
Free Books
The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.
Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.
Education
Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.
Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.
