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Public-domain Cartographic Software (24 Oct. 1994).
There are several sources of public domain cartographic software
that perform cartographic projections as well as other geodetic
computations such as compute geodesic distances (Great Circles)
and datum transformations.
A. General Cartographic Transformation Package or GCTP is one of
the oldest systems. It is a package of FORTRAN procedures that
provide forward and inverse projection of about 23 cartrographic
projections. It is the "official" system of the National Mapping
Division (NMD) of the US Geological Survey. It also provides
conversion of State Plane Coordinate System. It is documented
with *.txt, *.ps and word processor files as well as hard copy
manuals.
It is currently available via ftp from:
nmdpow9.er.usgs.gov (130.11.52.92)
as file public/amdahl/gctpv2.dat
It is also available from:
Phone: 1-800-USA-MAPS Fax:: (703) 648-5548
At the moment, prices for mail-order material is unknown.
For software questions and assistance contact:
Mike Linck
Phone: (703) 648-4667 Fax: (703) 648-4722
E-mail: mlinck@usgs.gov
U.S. Geological Survey
510 National Center
Reston, VA 22092
Note: there is a great deal of other information at this ftp
site described in *readme* files in the various directories.
Also assorted DOS procedures.
B. A C language (K&R style) version of GCTP developed at the EROS
Data Center. It provides the same projection services as GCTP
as well as about a half dozen additional projections.
It is available from ftp site:
edcftp.cr.usgs.gov (152.61.128.6)
as file pub/software/gctpc/gctpc.tar.Z
The material is documented with *.txt and PostScript files.
Indications in readme's indicate that due to funding, maintenance
and support for gctpc has stopped although a Q&A email address
is given.
Note: the above file is *very* long (~11Mb) due to test data and
would requires about 40Mb to uncompress and 80Mb to run the
test procedures. A copy of source code and documentation
extraction of this distribution is available on:
kai.er.usgs.gov (128.128.40.24)
as file pub/S.gctpc.tar.Z . It takes less than 1Mb for installation.
IMHO, the test data is poorly constructed, incomplete, does
not check against alternate sources and not worth distributing.
C. PROJ.4 system written in ANSI-POSIX C provides three application
programs (proj, nad2nad, and geod) as well as an easy to use
library for use in user-written application programs. More
than 110 forward projections are provided and inverses are
available for most (all commonly used ones). NADCON datum
conversion program is supplied as well as complete support
for SPCS and several international grid systems. Illustrated
documentation is supplied as three PostScript files.
Available at ftp site:
kai.er.usgs.gov (128.128.40.24)
in directory pub/PROJ.4 . Check README in this directory for
description of files.
For comment or help, contact:
Gerald (Jerry) I. Evenden
email: gie@kai.er.usgs.gov
phone: (508)563-6766
P.O. Box 1027
N.Falmouth, MA 02556-1027
Note: variants of *proj* are used in the GRASS system.
D. The National Geodetic Survey (NOAA/NGS) provides many FORTRAN procedures
and DOS programs for cartographic projections as well as datum
conversions and other geodetic information.
Contact (they take plastic):
NOAA, National Geodetic Survey, N/CG174
1315 East-West Highway, Station 9202
Silver Spring, MD 20910-3282
Phone: (301)713-3242; FAX (301)713-4172
Mon-Fri 7 a.m.-4:30 p.m. Eastern Time.
For complete list of products, ask for "Catalog of Products
and Services of the National Geodetic Survey" and "Geodetic and
Charting Publications". Prices are nominal for most software
products (~$30 US) and *certainly* better than the $90+ they
were charging in 1992.
From David Conner, conner@ra.cfm.ohio-state.edu,
Ohio Geodetic Advisor, NGS:
"... get the newsletter, 'C&GS UpdatE' It is a quarterly publication
advertising the latest NGS info, such as revised prices, new software,
Internet access, etc. If you do not receive it and would like to you
can get on the mailing list by contacting the NGS Information Center:"
301-713-3242 (voice)
301-713-4172 (FAX)
Also: "NGS now has an Internet Homepage and provides electronic
access to it's database, offering most NGS software *free of
charge*. This is detailed in the latest issue of the Coast and
Geodetic Survey's C&GS Update, Vol 6, No. 3, Summer 94. The URL
address of the home page is:"
http://www.ngs.noaa.gov
Ftp access is also available at:
ftp://ftp.ngs.noaa.gov
There are a lot of DOS *.exe's at this site. Sources are mostly
in FORTRAN 77. Site is well organized.
E. The Defense Mapping Agency (DMA) is also a source of considerable
cartographic software and information. Unlike the NMD/USGS
and NGS, DMA information is international in scope. Some products
(mostly maps) are sold through the USGS, but an outlet for software
and other geodetic information is currently unknown.
F. From Sol Katz (skatz@dsc.blm.gov), a notice of some sources for
UTM conversions on ftp.blm.gov (158.68.32.62) in pub/gis/ :
pub/gis/llutm.zip quickbasic src/exe for lat/lon to/from utm
and other stuff
pub/gis/ll2utm.f77 a f77 subroutine for lat/lon to utm conversion
There are some other interesting files on this ftp site (GIE).
Gerald (Jerry) I. Evenden Internet: gie@kai.er.usgs.gov
voice: (508)563-6766 Postal: P.O. Box 1027
fax: (508)457-2310 N.Falmouth, MA 02556-1027
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