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                                    PGCRVL
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PGCRVL is a PGPLOT routine (FORTRAN) which draws and labels curvilinear
coordinate grids.  Example PGCRVL grids can be seen at

   http://www.atnf.csiro.au/~mcalabre/pgcrvl.html

PGCRVL is provided as part of WCSLIB, available from

   ftp://ftp.atnf.csiro.au/pub/software/wcslib

mirrored at

   ftp://fits.cv.nrao.edu/fits/src/wcs.


Manifest
--------
   Makefile	GNU makefile for compiling PGCRVL.
   README	This file.
   pgcrvl.f     PGCRVL

   pgwcsl.f     Subroutine PGWCSL defines an interface to WCSLIB for PGCRVL to
                draw celestial coordinate grids.
   pgcrfn.f     Subroutine PGCRFN defines separable pairs of non-linear
                coordinate systems for PGCRVL.  Linear, logarithmic and
                power-law axis types are currently defined.  Further types may
                be added as required.

   pgtest.f     Test and demo program and coding example.
   fscan.f      Defines a non-linear coordinate grid for PGTEST.
   lngvel.f     Defines a non-linear coordinate grid for PGTEST.


Usage notes
-----------
The prologue to pgcrvl.f contains usage instructions.  pgtest.f serves as a
test and demonstration program and also as a well-documented example of usage.


Installation notes
------------------
A simple-minded GNU makefile is provided; GNU make must be used.  The makefile
compiles pgcrvl.o as a dependency of PGTEST.  It assumes that the FORTRAN
version of WCSLIB has been installed as /usr/local/lib/libwcs_f.a.


Author
------
Mark Calabretta, Australia Telescope National Facility
mcalabre@atnf.csiro.au

$Id: README,v 1.1 1999/12/14 04:36:55 mcalabre Exp $
