Julia wrapper for the Generic Mapping Tools GMT
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The Generic Mapping Tools, GMT, is an open source collection of tools for manipulating geographic and Cartesian data sets (including filtering, trend fitting, gridding, projecting, etc.) and producing PostScript illustrations ranging from simple x–y plots via contour maps to artificially illuminated surfaces and 3D perspective views. This link will take you to an impressive collection of figures made with GMT
This wrapper works with GMT5.3.1 and above and it is intended not only to access to GMT from within the Julia language but also to provide a more modern interface to the GMT modules. For example, instead of using the GMT classic syntax to do a line plot:
gmt psxy filename -R0/10/0/5 -JX12 -W1p -Ba -P > psfile.ps
one can simply do:
or, more verbose but easier to read
coast(region=:global, proj=:Winkel, frame=:g, area=10000, land=:burlywood4, water=:wheat1, figsize=12, show=true)
gmt coast -Rd -JR12 -Bg -Dc -A10000 -Gburlywood4 -Swheat1 -P > GMT_winkel.ps
] add GMT
A word of warning about the installation. The GMT.jl Julia wrapper does NOT install the GMT program. It's the user responsability to do that.
Windows64 It's better to install the GMT6 version
Download and install the official version at (the ..._win32.exe)
Follow instructions at https://github.com/GenericMappingTools/gmt#install-gmt
Since GMT produces PostScript you need a PS interpreter. Windows installer comes with ghostcript but on Mac/Linux you need to:
On OSX, with a manual GMT build and dependencies obtained with Homebrew (that are installed at
/user/local/lib), I had to help Julia finding MY libgmt.dylib, with (this line should than be
added to the ~/.julia/config/startup.jl file). Linux users have may have the same issue and this
solution has been reported to work too, though an alternative is to add the GMT lib location to
LD_LIBRARY_PATH (e.g. export
using Libdl push!(Libdl.DL_LOAD_PATH, "/path/to/gmt6/lib")
The GMT Julia wrapper was designed to work in a way the close as possible to the command line version
and yet to provide all the facilities of the Julia language. In this sense, all GMT options are put
in a single text string that is passed, plus the data itself when it applies, to the
However, we also acknowledge that not every one is comfortable with the GMT syntax. This syntax is
needed to accommodate the immense pool of options that let you control all details of a figure but that
also makes it harder to read/master.
To make life easier we provide also a new mechanism that use the GMT module name directly and where the program's options are set via keyword arguments. While the monolotic way of using this package is robust and keeps being updated to latestes GMT developments, this By modules alternative is a Work In Progress (the GMT supplements were not ported yet) and some things may not work yet. So all help is most than wellcome.
The GMT.jl is free software: you can redistribute it and/or modify it under the terms of the MIT "Expat"
License. A copy of this license is provided in