The files in this folder /MapTools/ are all Fortran 90 source code
in MODULE structure.

That is, they are not finished, stand-alone programs.
Instead, they do necessary algebraic or graphical work in support
of other applications, like my FiniteMap, NeoKineMap, Seismicity,
OrbWin, etc.

In a few cases, a routine will need to communicate with the user
to obtain additional information.
(An example: SUBROUTINE Prompter in Map_Tools.f90)
Such communication is by ASCII text-mode interface, which should
work approximately the same in all computer systems.

Many of these codes produce output graphical files.
They do so using the conventions of Adobe Illustrator, which you
will need to purchase.  I let Adobe take care of providing the
operating-system-specific parts of the user interface for viewing,
printing, exporting, and/or editing graphics.

You will need these files if you try to modify and recompile any
of the primary applications that refer to them.

You may also find it useful to incorporate them into programs
of your own.
In Fortran 90, you do this with a statement like "USE Sphere"
at the top of your program.  You can then refer directly to
subprograms and global variables within the module from your program.
(In order to avoid accidentally overwriting important variable values
within the modules, I have begun variable names in many modules with
a short prefix, like "ai_" in Adobe_Illustrator.f90.)

Note that the package of:
Sphere.f90
Adobe_Illustrator.f90
Map_Projections.f90
Map_Tools.f90
gives you many of the map-related capabilities of GMT
(Generic Mapping Tools), although not the 3-D data visualization
tools.

Best wishes,
Peter Bird
UCLA
2007.10.05