File: README

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    -------------------- P R O J . 4 --------------------
                      @(#)README	4.11 95/09/24 GIE REL"

This is Release 4.3 of cartographic projection software.

PLEASE read the following information as well as READMEs in the src
and nad directories.

PLEASE send information on any problems encountered or general inquiries to

	gie@kai.er.usgs.gov

or call Gerald I. Evenden at (508)563-6766 or write to same at:

	P.O. Box 1027
	N. Falmouth, MA 02556-1027
	USA

   ---------------------------------------------------

Installation:
-------------

FSF's configuration procedure is used to ease installation of the
PROJ.4 system.

The default destination path prefix for installed files is /usr/local.
Results from the installation script will be placed into subdirectories
bin, include, lib, man/man1 and man/man3.  If this default path prefix
is proper, then execute:

	./configure

If another path prefix is required, then execute:

	./configure --prefix=/my/path

In either case, the directory of the prefix path must exist and be
writable by the installer.

After executing configure, execute:

	sh install

The install script will create, if necessary, all required sub-
directories.

   ---------------------------------------------------

Distribution files and format.
------------------------------

Sources are distributed in one or more files.  The principle elements
of the system are in a compress tar file named `PROJ.4.x.tar.gz' where
"x" will indicate level.sub-level of the release.  For U.S. users
interested in NADCON datum shifting procedures, additional files
containing conversion matricies are distributed with the name
`PROJ.4.x.y.tar' where y is an uppercase letter starting with "A."
These supplementary files will contain compressed files and thus
the tar file is not compressed.

Interim reports on Rel. 4 proj are available in PostScript form as
*.ps.gz .  New and old users are strongly recommended to carefully read
these manuals.  They are supplements and NOT a replacement for the full
manual OF 90-284 (which new users should also obtain).

   ---------------------------------------------------

Principle new aspects of system:
--------------------------------

ANSI X3.159-1989 C code.  Site must have ANSI C compiler and header files.

Several method of determining radius from specified ellipsoid.

Use of initialization files through +init=file:key.  Default projection
specifications also may be defined in an ASCII file.

+inv option REMOVED and -I may be used in its place.  Use of invproj
alias of proj still functions as per Rel.3.

+ellps=list and +proj=list REMOVED.  Use respective -le and -lp.

+units= to specify cartesian coordinate system units.  To get list
use -lu.

-v added to dump final cartographic parameters employed.

Addition of computing scale factors and angular distortion added through
-S option.  Valuable for designing new projection parameter details.

-V option which verbosely lists projected point characteristics.

Programmers may use projection library with calls to pj_init and
pj_fwd and/or pj_inv.

Program nad2nad for conversion of data to and from NAD27 and NAD83
datums.

-------------------------------------------------------------

Things currently left undone:
----------------------------

proj_def.dat NOT fully in place.  Needs additional settings for
many of the projections.  Probably will not be completed until main
manual rewritten.