HDTenEightyP/NetNews huggingface dataset:
From: xdejxs@jeep.NoSubdomain.NoDomain (john sharry)
Subject: Digital Chart of the World
Organization: Oryx Energy, Dallas, Texas.
Date: Mon, 12 Oct 1992 20:00:06 GMT

I've noticed some frustration on getting data out of the DCW and
understanding the VPF format.  As a quick and dirty solution we went
into the xxxGRAPH routines in VPFVIEW and trapped the latlong-values
they were using and wrote them out in a format we could use.  We still
use VFPVIEW to select layers and windows.  This took less than a day to
put together.  We are having problems dumping very large files, ie: all
major rivers on the Eurasia disk, the graphics hangs up.  We can dump
other large files such as coasts and roads ok.  You will lose other data
atrtributes that are associated with the graphics entities that you
could get to by accessing the VPF data base directly.  At this point we
can get polygons but are having problems with those that have holes in
them such as oceans with an island as a hole.  This needs some more work.

I hope this gives people a idea of how to get some data out without
understanding all of VPF.

_________
John Sharry
Oryx Energy Co.
Dallas, TX
jsharry@oryx.com
From: stinger@pine.circa.ufl.edu (GUALA)
Newsgroups: comp.infosystems.gis
Subject: ftp for images?
Date: 9 Oct 92 20:59:28 GMT
Reply-To: stinger@pine.circa.ufl.edu
Organization: University of Florida  (ufl.edu)
News-Software: VAX/VMS VNEWS 1.3-4

Are there any ftp sites around (maybe sponsored by FAO, NSF etc.) for 
GIS images?  I'm looking particularly for line or polygon files for 
tropical areas but I think that it would be really useful for a lot
of poeple to post such info if anyone out there has it.   Stinger
Newsgroups: comp.infosystems.gis
From: feuchtwa@beaufort.sfu.ca (Martin Feuchtwanger)
Subject: Re: Scale seen as dangerous
Organization: Simon Fraser University, Burnaby, B.C., Canada
Date: Fri, 16 Oct 1992 20:55:47 GMT

Mark Johnson <johnson@ARC.AB.CA> writes:

>Is there anything we can do to UNLOAD the term "scale"?  Is there
>another term that we can use that means ONLY scale?

Yes there is! The term "representative fraction" or "RF" is the
specific term describing the relationship between a distance on
the map and the corresponding distance on the ground.  I like to
consider "scale" as an umbrella term, synonymous with "level of
(cartographic) generalization", that encompasses RF, resolution,
accuracy, precision, lineage, etc.  I think map makers and users
have been using the quantitative RF (such as 1:50000) quite
hapily to imply, in a qualitative manner, the other generalization
characteristics.  Of course, for rigorous analysis separate measures
are needed.
From: ron@topaz.bds.com (Ron Natalie)
Newsgroups: comp.infosystems.gis
Subject: Re:      DCW data format ?
Date: 10 Oct 1992 16:24:39 GMT
Organization: BDS Systems
Distribution: world
NNTP-Posting-Host: topaz.bds.com

Digital Chart of the World is provided in the Vector Product Format.
It's defined by MIL-STD-600006.  There is dos software in the kit
that decodes it.

Information on the origins and where to get the standards are in the
books that come with the kit.

-Ron
From: cmp0145@sys.uea.ac.uk (R. Hughes)
Newsgroups: comp.infosystems.gis
Subject: Help on terrain mapping?
Date: 13 Oct 92 15:56:27 GMT
Organization: UEA School of Information Systems, Norwich, UK.

Hi my name is Rob,
                  I am currently doing my third year computing project
on 3D terrain mapping and would be very grateful if somebody could give me
references to articles or scientific papers on this subject.
                      Thanks in advance
                            Rob Hughes
                      
            EMAIL ADDRESS cmp0145@uk.ac.uea.sys
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Newsgroups: comp.infosystems.gis
Date:         Fri, 16 Oct 1992 10:13:37 HAE
              <GIS-L@UBVM.BITNET>
From:         Chris Gold <CGOLD@VM1.ULAVAL.CA>
Subject:      re: General-purpose GIS algorithms
              15 Oct 1992 02:16:56 GMT from <bthoen@TEAL.CSN.ORG>

In reply to the "availability of basic GIS algorithms" questions:

I am half way through a text-book on the subject, aimed at the level
of students with an introductory course in programming but needing a
review of vector and matrix algebra, etc. The book is tentatively
titled "Mapematics" (cute, eh?).

Comments, suggestions and offers to review what has been done would
be welcomed.

Chris Gold

CGOLD@VM1.ULAVAL.CA
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X-VMS-To: IN%"gis-l@ubvm.bitnet",DJSAVORY
Newsgroups: comp.infosystems.gis
Date:         Tue, 13 Oct 1992 13:10:00 CDT
              <GIS-L@UBVM.BITNET>
From:         NAME <DJSAVORY@MACC.WISC.EDU>
Subject:      GRASS in AT&T UNIX Env.

Hello,

Does anyone out there have any experience running GRASS on IBM PC/AT's
under AT&T UNIX?  If so, I's appreciate some general info on how difficult
it is to install, and any problems or complaints.  Thanks in advance.

David Savory
djsavory@macc.wisc.edu
djsavory@wiscmacc.bitnet
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X-VMS-To: IN%"GIS-L@UBVM.cc.buffalo.edu"
Newsgroups: comp.infosystems.gis
Date:         Mon, 12 Oct 1992 16:57:00 GMT
              <GIS-L@UBVM.BITNET>
From:         STGG8004@IRUCCVAX.UCC.IE
Subject:      Re: macGIS

> I'm a postgraduate in Cork Ireland, who teaches IBM based GIS and related
> topics.  At home I'm a Mac User.  I would also be interested in cheap Mac
> based GIS.  Ian O'Connell Argg6024 IRUCCVAX

Rumour had it that a Mac version of IDRISI was (is?) being considered. Is
this mere fantasy or is there any truth in the speculation?

Darius Bartlett (DJB@IRUCCVAX.UCC.IE)
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Via: uk.ac.york.vaxa; Thu, 8 Oct 1992 08:09:34 +0100
Newsgroups: comp.infosystems.gis
Date:         Thu, 8 Oct 1992 08:10:00 GMT
              <GIS-L@UBVM.BITNET>
From:         Peter Halls <PJH1@VAXA.YORK.AC.UK>
Subject:      RE: ARC/INFO v. 6.0.1--ARCSHELL?

ARCSHELL was not exactly an ARC/INFO module, more a collection of AML's that
provided a window style user interface on top of the standard 5.x coomand
lines.  As such, the comments in 'What's new' about ARC/INFO (and AML) now
supporting the 'native windowing system' (line 1, para 1 on page 2-45) cover
a great deal of ground.  Also the AML changes to the menu commands, et al.

As one who provided a local toolbox using ARCSHELL and now is about to rewrite
it for 6.1 ...

Perhaps someone who has already been here can comment on the magnitude of the
effort involved?

Peter Halls
University of York

PJH1@UK.AC.YORK   ... or t'other way about


PS: I seem to think that in the 'pre-release' notes on Rev 6, the demise of
ARCSHELL was mentioned - as the inevitable consequence of providing windowing
support properly ... but something in the 'changes' documents would have been
nice; something about the necessary changes would have been helpful!
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X-Envelope-to: GIS-L@UBVM.cc.buffalo.edu
X-VMS-To: IN%"GIS-L@UBVM.cc.buffalo.edu"
Newsgroups: comp.infosystems.gis
Date:         Mon, 12 Oct 1992 16:25:00 GMT
              <GIS-L@UBVM.BITNET>
From:         STGG8004@IRUCCVAX.UCC.IE
Subject:      Re: need help on determining the direction of closed circle

> Could somebody there tell me an algorithm about how to determine if
> a point is in a polygon or the boundary of the polygon is clockwise?
> The polygon is just consists of some closed x-y nodes.

There have been a small but steady trickle of postings to GIS-L from time
to time, from people looking for algorithms for GIS. Many of these relate
to algorithms for the relatively basic (as far as the user is concerned
at least) functions of GIS, such as line generalisation, point-in-polygon
searching, etc.

May I offer a suggestion / idea / request to any sympathetic reader out
there in Netland (maybe the NCGIA)?  Would you consider producing and
publishing a collection (a training manual / student text / workbook maybe)
of a range of the most common algorithms used in "standard" GIS? WHile trade
secrets, proprietary information, etc., is obviously going to be guarded
jealously, there are a whole mess of routines and methods that have now
more-or-less become "public domain" by virtue of their utility and/or
conceputual simplicity (e.g. the Douglas-Peuker line generalisation
algorithm). But as far as I know there is no one source of reference for
these. It would certainly be very useful to have a "text book of GIS
algorithms", particularly one written for the non-programmer, but maybe
containing suggested implementations in one or two common languages,
to throw at my students when I start on the technical side of GIS.

Just a thought.... (and if anyone wants to take up the idea, I hereby
waive my royalty fees for thinking of the idea  :-)

Darius Bartlett
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Newsgroups: comp.infosystems.gis
Date:         Thu, 8 Oct 1992 08:29:20 -0400
              <GIS-L@UBVM.BITNET>
From:         "(Theodore B. Samsel)" <tbsamsel@DG11SVARMD.ER.USGS.GOV>
Subject:      League of Real Surveyors

NOTE: this was gleaned from an in-house E-mail con...
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Yup, another one. I guess today must be Continuum day, but this entry
is for general information and entertainment only. An interesting but
lampooning fictitous notice critical of GIS technology and it's encroachment
on the surveying field is floating around the Federal Building here in Sacra-
mento. It's origins lead to the surveyors in BLM. It appears some folks are
not happy with the GIS technology and it's encroachment on the surveying pro-
fession and are taking issue with it. For what reasons, I'm not sure, but the
movement is most probably related to job security issues and a lack of under-
standing of GIS capabilities. The notice is listed below:

======================================================================

                         NOTICE

   This room has been declared a G.I.S. Free Zone by the
   League of Real Surveyors. Anyone entering this room
   must obey the following regulations, under penalty of
   ridicule:

   1. Geographic Information Systems may only be referred
      to as "the GIS" (pronounced jiz).

   2. G.I.S. related publications and software are strictly
      forbidden, unless they also contain: a) Elements which
      are applicable to real-world surveying. b) Significant
      amounts of hard science.

   3. Dress code: No sweater-vests allowed.


          /\          YOU HAVE BEEN WARNED!          /\
         /  \                                       /  \
        / .  \         Death Before G.I.S.         / .  \
       /______\      League of Real Surveyors     /______\
                            Est. 1991

   The League of Real Surveyors is dedicated to the protection of the
   surveying profession from the increasing dominance of the Geographic
   Information Systems field. Out motto is: "Don't GIS on me!"  For
   membership information, send a SASE to: League of Real Surveyors,
   c/o Tim Patch or Scot MacDonald, Department of Surveying Engineering,
   246 Boardman Hall, Orono, Maine 04469; or call (207)-581-2210.

=========================================================================

If I were a surveyor, I think I'd be more concerned about the encroachment
of GPS, not GIS, into the surveying field. It would be interesting to
find out more about what this organization has to say about GIS, and why
they are so negative on the technology. Maybe some of the more vociferous
WRD folks (someone quickly comes to mind) should give these guys a call,
and see if this is for real.
#
(POSTERS NOTE...I called and it is tongue in cheek..having done survey
before, I have enough tick bites to
 join).~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 ~`~~~~
Ted Samsel.......TBSAMSEL@QVARSA.ER.USGS.GOV..(use this!)
Newsgroups: comp.infosystems.gis
From: herb_koehl@umanitoba.ca (herb koehl)
Subject: gis/lis 92 ? student accomodations
Followup-To: comp.infosystems.gis
Organization: University of Manitoba
Date: Fri, 9 Oct 1992 14:32:22 GMT

I am attending gis/lis 92 and am looking for the least expensive
accomodation possible. As an undergraduate in computer science I am paying
my own way so I'm hoping to find someone in San Jose to stay with. I'm
housebroken and a non-smoker. Rich Taketa suggested that others attending
the conf. might be willing to share hotel rooms and I'm willing to make the
arrangements if someone wants to do that.

Contact me at 204-772-9961 or send me e-mail.

thanks

herb_koehl@umanitoba.ca
University of Manitoba   
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Newsgroups: comp.infosystems.gis
Date:         Mon, 12 Oct 1992 08:07:17 -0700
Reply-To:     Marcus Lester <marcusl@u.washington.edu>
              <GIS-L@UBVM.BITNET>
From:         Marcus Lester <marcusl@U.WASHINGTON.EDU>
Subject:      Digital Scale Confusion

I like Duane Marble's description the best. In the simplest (perhaps
oversimplified) language, the scale given to the digital data is the scale
of the map from which the data were digitized. While the digital data are
essentially scale-less, this stated scale is perhaps one of the most
important pieces of information for judging the fitness of the data for a
particular use. As a user, I can make some pretty good estimates of the
accuracy and precision of the digital data from this one item of metadata.

Marcus Lester
Battelle Environmental Planning and Social Research Center
email: mk_lester@pnl.pnlg.gov
Phone: (206) 528-3308          Fax: (206) 528-3552
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Newsgroups: comp.infosystems.gis
Date:         Fri, 16 Oct 1992 14:12:00 PDT
              <GIS-L@UBVM.BITNET>
From:         "Virginia Hetrick, in sunny Calif" <IARGRAF@UCLAMVS.BITNET>
Subject:      Re: need help on determining the direction of closed circle

I like Darius' suggestion of having a document with some major
algorithms in it.  Something on the order of the Graphics Gems
collections would be slick (although it wouldn't necessarily need
to be as complex as the GG collections).  Basically, there is a
short text explanation of the Gem, a pseudo-code copy of the
algorithm, and usually a C version on the accompanying floppy
disk.  Some of them also have a Fortran version on the accompanying
floppy disk.

Until there's such a collection for specific GIS Gems, folks may
want to take a look at Graphics Gems, Graphics Gems II, and Graphics
Gems III which are in most bookstores with serious collections of
computer graphics books for sale.  III has the software for all three
volumes to date.   These are seriously good sources of algorithms for
doing computer graphics if you're down to the silicon!

HTH.

virginia
From: dmarble@magnus.acs.ohio-state.edu (Duane F Marble)
Subject: Re: Confused about digital scales
Organization: The Ohio State University
Date: Mon, 12 Oct 1992 02:37:22 GMT

It is a reflection of the physical reality of the input data upon
which the digital database rests. If you like, it is one of the
critical attributes of the mandatory data dictionary which must be
an integral part of every digital database.
-- 
Duane F. Marble			       E-mail: dmarble@magnus.acs.osu.edu
Department of Geography                Telephone: (614) 292-2250
The Ohio State University
Columbus, Ohio 43210                   Fax: (614) 292-6213
Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
Newsgroups: comp.infosystems.gis
Date:         Sun, 11 Oct 1992 11:08:08 PDT
              <GIS-L@UBVM.BITNET>
From:         spalladi@PIXIE.NCGIA.UCSB.EDU
Subject:      GIS in the schools

The NCGIA Secondary Education Project (SEP) has been investigating the
place of GIS in the secondary school classroom.  We have labeled the
first year and a half of our activities as Phase I.  Phase I has included
attempts to identify existing GIS activities for the schools including
appropriate GIS instructional materials and software packages.  In order
to receive informed teacher feedback on the possibilities for and pitfalls
to GIS use in the schools, the NCGIA sponsored a seven day workshop for
teachers to interact with GIS and respond to it as a potential educational
tool.  The SEP is now moving into a second phase in which we will act on
the recommendations we have received from various sources during Phase I.
Phase II activities may include a series of workshops similar to the
Phase I workshop and collaborative efforts to develop GIS instructional
modules for the schools.  One major goal of the SEP is to have our
activities be responsive to the other GIS activities for the schools.
We would like to hear from you if you have ideas about how GIS can be
used in the schools.  We would especially like to hear from you if you
have or are considering a GIS project for the schools.

If you would be interested in the SEP Progress Report (a simple one
page newsletter sent out 3 or 4 times a year), please send me your
address (via email is fine).  I will be sending out the latest
progress report in a week or two.  It will describe our workshop
held last summer in a bit more detail.


STEVE PALLADINO
Secondary Education Project Manager
National Center for Geographic Information and Analysis
University of California, Santa Barbara
Santa Barbara, CA  93106-4060
Phone: (805)893-8652
FAX: (805)893-8617
E-mail: (Internet) spalladi@ncgia.ucsb.edu
        (Bitnet) palladi@voodoo.bitnet
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Newsgroups: comp.infosystems.gis
Date:         Fri, 9 Oct 1992 11:00:33 PDT
              <GIS-L@UBVM.BITNET>
From:         "(Zhan)" <esri!falcon!zhan@UUNET.UU.NET>
Subject:      Re: Skeletonizing Contour Lines

> From: "(William Bushing)" <uunet!UCSBUXA.UCSB.EDU!6500boo>
> Subject:      Skeletonizing Contour Lines
>
> I used a scanner to scan in contour lines from a USGS color
> separate. Because the scan was at "high" (300 dpi) resolution,
> my scan lines are several pixels wide. I want to reduce them
> to single pixel widths by "skeletonizing" the lines. This is
> so I can run an inter-contour interpolation program to create
> a DEM.
>
> Any suggestions on skeletonizing algorithms or existing soft-
> ware with such capabilities? Many thanks in advance.
>
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>

If you can convert the scanned data into ARC/INFO GRID format,
  1. Use THIN in GRID if the final product is to be in the raster format, or
  2. Use GRIDLINE in ARC or GRID if the final product is in the vector format.

Cixiang Zhan
czhan@esri.com
Newsgroups: comp.infosystems.gis
From: bthoen@teal.csn.org (Bill Thoen)
Subject: re: running GRASS under SCO unix
Organization: Colorado SuperNet, Inc.
Date: Thu, 15 Oct 1992 02:17:41 GMT

-> Has anyone had experience running GRASS under SCO unix on a 386/486
-> anyone support GRASS under SCO.  I would like to hear how well it run
-> how buggy it is

try contactin jeff nieghbert, BLM, portland OR

- Sol Katz
  bthoen@csn.org (for now...)
-- 
_   /|     Bill Thoen 
\'o.O'     bthoen@csn.org 
=(___)=
   U 
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Newsgroups: comp.infosystems.gis
Date:         Thu, 15 Oct 1992 14:27:24 EDT
              <GIS-L@UBVM.BITNET>
From:         John Weishampel <JFW3G@WATSON.ACC.VIRGINIA.EDU>
Subject:      A few basic geography questions

A FEW QUESTIONS FOR THE GIS NETTERS:

IS THERE A GAZETTEER OR ATLAS THAT GIVES THE AREA AND THE LAT, LON
OF THE VAST MAJORITY OF THE WORLD'S ISLANDS (DOWN TO A FEW HECTARES)?

IS THERE A METHOD, GIVEN THE X, Y (LAT, LON) COORDINATES OF A GROUP
OF POINTS, TO FIND THE CENTROID OF THE POINTS?  IS IT SIMPLY:

  (X1 + X2 + X3 + X4... XN)/N  ,  (Y1 + Y2 + Y3+ Y4... YN)/N  ?

NOW IS THERE A METHOD TO FIND THE CENTROID (OR CENTER OF MASS) WHICH
TAKES INTO CONSIDERATION THE AREA OF THE ISLANDS AND THERE LOCATION?

I HOPE THESE QUESTIONS AREN'T TOO ELEMENTARY, BUT WOULN'T BE SURPRISED
IF THEY ARE.

THANKS

JOHN F. WEISHAMPEL
DEPARTMENT OF ENVIRONMENTAL SCIENCES
UNIVERSITY OF VIRGINIA
CHARLOTTESVILLE, VA 22903
JFW3G@VIRGINIA.EDU
Newsgroups: comp.infosystems.gis
From: dmarble@magnus.acs.ohio-state.edu (Duane F Marble)
Subject: Re: GIS in the schools
Organization: The Ohio State University
Date: Mon, 12 Oct 1992 00:34:09 GMT

It seems strange that you do not mention the substantial National
Geographic activity in geography for the primary and secondary schools.
Surely you are closely coordinated with their activities?
-- 
Duane F. Marble			       E-mail: dmarble@magnus.acs.osu.edu
Department of Geography                Telephone: (614) 292-2250
The Ohio State University
Columbus, Ohio 43210                   Fax: (614) 292-6213
Newsgroups: comp.infosystems.gis
Date:         Thu, 8 Oct 1992 19:27:34 -0700
              <GIS-L@UBVM.BITNET>
Comments:     Warning -- original Sender: tag was
              navanax@MILTON.U.WASHINGTON.EDU
From:         Indiana Jones <navanax@U.WASHINGTON.EDU>
Subject:      Mail replies

   I would have to agree with JPF that in most cases, it is very helpful
that individuals respond to general questions on GIS-L rather than directly.
Except for the occasional personals that get posted on here, this approach
helps quite a bit. I know it's helped me...

   Tom Edwards
   Dept. of Geography
   Univ. of Washington
   navanax@milton.u.washington.edu
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Date:         Fri, 9 Oct 1992 09:55:52 EDT
              <GIS-L@UBVM.BITNET>
Comments:     Resent-From: David_Douglas <DHDAD@ACADVM1.UOTTAWA.CA>
Comments:     Originally-From: David_Douglas <DHDAD@ACADVM1.UOTTAWA.CA>
From:         David_Douglas <DHDAD@ACADVM1.UOTTAWA.CA>
Subject:      Re: 3-d tactile GIS output

In about 1973 a company came out with a most unusual piece of hardware.
It took in as data, on punched cards, a "geographical matrix" now a dem,
and drove pieces of wire through a piece of hardwood to the required height
and made a "bed of nails"  to the shape of the surface represented. The
craftsman then troweled in plaster to the required shape, to result
in a complete composite construction of the represented surface. I have
an old dusty pile of flyers from those days. I'll look for it.
Another way is to have a drill connected and controlled     to drill the
surface in a block of styrofoam. There are several companies that do that,
but one I know of has an operator trace the contours with a pantograph like
device with the business end connected to a carpenter's router. A Vancouver
company produces models of ski resorts, mine pits and boundary disputes.
For one such model, of the Gulf of Maine, done for Canada for the boundary
dispute, they got over $100,000. The model measured about 20 feet by 30
feet. It was never presented at the court at the Hague, because its 30 times
vertical exaggeration tended to support the American case.
(which was based on topographic variables, whereas the Canadian case relied
on horizontal geometry. My little $500   VUBLOK  perspective view profile
line maps were substituted.  It was the only boundary dispute Canada ever won.
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Mailer: Elm [revision: 66.25]
Newsgroups: comp.infosystems.gis
Date:         Tue, 13 Oct 1992 14:49:02 MEZ
              <GIS-L@UBVM.BITNET>
From:         Georg Magenschab <wigeomag@WU-WIEN.AC.AT>
Subject:      Re: Grass on SCO Unix ?
              "<@AWIWUW11.WU-Wien.AC.AT:GIS-L@UBVM.BITNET>" at Oct 12,
              92 8:53 am

>
> 	Howdy,
>
> 	Has anyone had experience running GRASS under SCO unix on a 386/486 ?  Does
> anyone support GRASS under SCO.  I would like to hear how well it runs and/or
>  how
> buggy it is
>
> 							Patrick Jones
> 							plj@mitre.org
>

Patrick,
we compiled grass4.0 on a Interactive UNIX System V PC 386 and it works
fine. We had troubles to compile the X-Driver so it's neccessary that you
have experiences with porting C-Source.
Interactive UNIX and SCO are binary compatible and so it  may work on SCO
too, but I never tried it.
Hope that helps!

George W. MAGENSCHAB
University of Business Administration
Department of Geography
Augasse 2-6
1090 Vienna / Austria
e-mail: wigeomag@nestroy.wu-wien.ac.at