From cshorte2 at csc.com  Wed Jul  7 23:57:47 1999
From: cshorte2 at csc.com (cshorte2 at csc.com)
Date: Thu, 8 Jul 1999 16:57:47 +1000
Subject: mapserver on freshmeat?
Message-ID: <4A2567A8.0025F331.00@csc.com>

Hi,
Just did a search for mapserv on http://www.freshmeat.net without sucess.
This is the website that keeps track of all the linux packages and their
release versions and so forth.

I suggest registering mapserv on freshmeat.  It would probably attract more
support, more hackers, and hence mapserv would improve faster.

Cameron Shorter.




From camerons at cat.org.au  Thu Jul  8 03:54:01 1999
From: camerons at cat.org.au (Cameron Shorter)
Date: Thu, 08 Jul 1999 20:54:01 +1000
Subject: Dumb question on Extents
Message-ID: <4.0.2.19990708204354.008bad70@mail.optusnet.com.au>

Hi,

I'm having problems getting my first map to come up.  So far all I'm
getting is a blank page, which raises the following questions.  (Please
excuse me, but I have no GIS training).

* What are the units of Map Extents, and what are they relative to?

* Given a shapefile, how do I determine the Extent of the data represented
in it?  I've tried working this out with ArcExplorer, but I'm stumbling
over units.  Hence the previous question.

* It would be good if there was an explanation of what the fields in the
logs mean (although I think I've guessed most of the fields).

* Are there any other debugging tools around that I should know about?

Cameron Shorter
61.2.9901-1596 work.


From imap at chesapeake.net  Thu Jul  8 05:02:38 1999
From: imap at chesapeake.net (imap at chesapeake.net)
Date: Thu, 08 Jul 1999 08:02:38 -0400
Subject: Dumb question on Extents
References: <4.0.2.19990708204354.008bad70@mail.optusnet.com.au>
Message-ID: <3784935E.F90BC8A0@chesapeake.net>


CS,

The "units" describes the map coordinate system.  It could be meters, feet or
degrees for non-projected data.  A given shapefile has extents, which can
be extracted and viewed with a command-line program called "shpdump" which
can be found in <ms_3.2>/shapelib.  There are a couple of utilities in that
directory... well work the time to check them out. 

Logfile entries are modelled after the httpd stuff (sort of), and sometimes
can be your only source of debugging. 
<time> <pid> <remote_addr> <map_name> <extents> <map.x> <map.y> <layers>
<status>

When something goes wrong, make sure to check the status field.  On the first
map
being blank make sure passing at a minimum the following:

&map=<mapfile>
&mapext=<minx>+<miny>+<maxx>+<maxy>      (the "+" is a literal seperator)
&zoomsize=<value>


My test URL looks like:

http://localhost/cgi-bin/mapserv.exe?map=test.map&mapext=-3300000+3000000+3220000+6300000&zoomsize=2&mode=map

produces a map only....  

As far as debugging things, make sure you check your httpd error_log and the
mapserver 
access_log.   Usually you get some thin message from mapserv, but depending on
the
severity you may not get anything... In which case, check the logfiles.  That
should
give you a clue about what is broken.  With respect to debugging, the error
messages
are terse.  Steve improved this area to some degree, but we still needs more
verbose
msError.message ;)

Since I was up early this morning, I thought I would go ahead and answer what
I could.

Regards,

-Chris (imap at chesapeake.net)


Cameron Shorter wrote:
> 
> Hi,
> 
> I'm having problems getting my first map to come up.  So far all I'm
> getting is a blank page, which raises the following questions.  (Please
> excuse me, but I have no GIS training).
> 
> * What are the units of Map Extents, and what are they relative to?
> 
> * Given a shapefile, how do I determine the Extent of the data represented
> in it?  I've tried working this out with ArcExplorer, but I'm stumbling
> over units.  Hence the previous question.
> 
> * It would be good if there was an explanation of what the fields in the
> logs mean (although I think I've guessed most of the fields).
> 
> * Are there any other debugging tools around that I should know about?
> 
> Cameron Shorter
> 61.2.9901-1596 work.


From mapadm at polsl.gliwice.pl  Thu Jul  8 08:24:28 1999
From: mapadm at polsl.gliwice.pl (Grzegorz Myrda)
Date: Thu, 8 Jul 1999 17:24:28 +0200
Subject: Dumb question on Extents
In-Reply-To: <4.0.2.19990708204354.008bad70@mail.optusnet.com.au>
Message-ID: <199907081521.RAA11127@zeus.polsl.gliwice.pl>

> I'm having problems getting my first map to come up.  So far all I'm
> getting is a blank page, which raises the following questions.  (Please
> excuse me, but I have no GIS training).

MapExtent is in units features are stored in shapefile (you can 
check it with ArcExplorer, different units are only for scalebar 
computations). But the most likely reason of getting blank page is 
that there is no access to shapefile (bad filename, path or 
something). Mapserver doesn't generate errors in such a cases, 
but pass to next layer.  If none of layers are accessible then there 
is a blank page. 

Grzegorz 


From camerons at cat.org.au  Sat Jul 10 06:39:00 1999
From: camerons at cat.org.au (Cameron Shorter)
Date: Sat, 10 Jul 1999 23:39:00 +1000
Subject: Dumb question on Extents
In-Reply-To: <3784935E.F90BC8A0@chesapeake.net>
References: <4.0.2.19990708204354.008bad70@mail.optusnet.com.au>
Message-ID: <m112xPk-000YibC@mailarray.mpx.com.au>

Thanks Chris and Grzegorz for your advice,

I feel much the wiser, but still have blank displays.  I'm about to start
looking through code, and seeing if I can attach a debugger to a httpd
process.

> With respect to debugging, the error
>messages
>are terse.  Steve improved this area to some degree, but we still needs more
>verbose
>msError.message ;)

Have to agree with this comment. :)

Cameron Shorter
61.2.9901-1596 work.


From bfraser at digitalscience.com  Mon Jul 12 08:14:32 1999
From: bfraser at digitalscience.com (Brent Fraser)
Date: Mon, 12 Jul 1999 09:14:32 -0600
Subject: Version 3.3 wish list...
References: <s777513d.021@smtp.dnr.state.mn.us>
Message-ID: <003d01becc79$3f960ce0$390002c0@servo>

Steve,


  Another feature request.

Label size by map units.  This is somewhat related to a previous
request to have the label size set from a database value.  If the
shapefile does not have a field for text size, I'd like to be able to
set the size in the map file.  Right now it is possible to set the size
using "points"  (and pixels?), but I would like the option of using
the map units (e.g. meters).

Thanks!

Brent


----- Original Message -----
From: Stephen Lime <steve.lime at dnr.state.mn.us>
To: <mapserver-users at lists.gis.umn.edu>
Sent: Monday, June 28, 1999 9:40 AM
Subject: Version 3.3 wish list...


> Hi: I'm working on 3.3 and wanted to let people know what to expect
featurewise
> and to ask again for bug reports and feature requests. I've already gotten
a number
> of them and will incorporate as many as possible. Here's a list of new
stuff or changes.
>
:
>
> Again, now is the time to make suggestions, feature requests and bug
reports. Thanks.
>
> Steve
>
>
> Stephen Lime
> Internet Applications Analyst
> MIS Bureau - MN DNR
>
> (651) 297-2937
> steve.lime at dnr.state.mn.us
>
>



From steve.lime at dnr.state.mn.us  Mon Jul 12 08:42:48 1999
From: steve.lime at dnr.state.mn.us (Stephen Lime)
Date: Mon, 12 Jul 1999 10:42:48 -0500
Subject: Version 3.3 wish list...
Message-ID: <s789c6ae.001@smtp.dnr.state.mn.us>

By using the SYMBOLSCALE option you can already do this.
SYMBOLSCALE allows you to specify a scale at which symbols and labels
appear "full-size"- that is the size you define. At that scale a font would have
a size in map units and that size would be maintained as you zoom in or out.
Furthermore you can put bounds on those sizes using the MINSIZE and MAXSIZE
parameters for label objects. These can be used to ensure that text (or symbols) 
doesn't get too small or too big. As an AcrInfo weenie I find using a scale more
intuitive than straight size in map units. It's an easy addition, but would require 
yet another parameter (SIZEUNITS map/image). If there are a number of users
that want it, then I'll add it.

Steve

Stephen Lime
Internet Applications Analyst
MIS Bureau - MN DNR

(651) 297-2937
steve.lime at dnr.state.mn.us

>>> "Brent Fraser" <bfraser at digitalscience.com> 07/12 10:14 AM >>>
Steve,


  Another feature request.

Label size by map units.  This is somewhat related to a previous
request to have the label size set from a database value.  If the
shapefile does not have a field for text size, I'd like to be able to
set the size in the map file.  Right now it is possible to set the size
using "points"  (and pixels?), but I would like the option of using
the map units (e.g. meters).

Thanks!

Brent


----- Original Message -----
From: Stephen Lime <steve.lime at dnr.state.mn.us>
To: <mapserver-users at lists.gis.umn.edu>
Sent: Monday, June 28, 1999 9:40 AM
Subject: Version 3.3 wish list...


> Hi: I'm working on 3.3 and wanted to let people know what to expect
featurewise
> and to ask again for bug reports and feature requests. I've already gotten
a number
> of them and will incorporate as many as possible. Here's a list of new
stuff or changes.
>
:
>
> Again, now is the time to make suggestions, feature requests and bug
reports. Thanks.
>
> Steve
>
>
> Stephen Lime
> Internet Applications Analyst
> MIS Bureau - MN DNR
>
> (651) 297-2937
> steve.lime at dnr.state.mn.us 
>
>




From TBanister at SpaceImaging.com  Mon Jul 12 09:35:21 1999
From: TBanister at SpaceImaging.com (Banister Trevor)
Date: Mon, 12 Jul 1999 10:35:21 -0600
Subject: ActiveX version of Mapserver
Message-ID: <AEEF94298C10D311B5A000A024B359E133F48D@imager9.spaceimaging.com>

I've heard rumors about someone compiling Mapserver as an ActiveX ASP
component. I've thought of doing this myself, but if someone has already
done a port I won't re-invent the wheel. Does anyone know of such an effort,
and if the code or binary is available?

Thanks.

Trevor Banister


From bfraser at digitalscience.com  Mon Jul 12 10:10:11 1999
From: bfraser at digitalscience.com (Brent Fraser)
Date: Mon, 12 Jul 1999 11:10:11 -0600
Subject: Fw: ActiveX version of Mapserver
Message-ID: <009b01becc89$6735fd90$390002c0@servo>


----- Original Message -----
From: Brent Fraser <bfraser at geoanalytic.com>
To: Banister Trevor <TBanister at SpaceImaging.com>
Sent: Monday, July 12, 1999 10:58 AM
Subject: Re: ActiveX version of Mapserver


> I've done some work along the ASP line.  I've only implemented
> a few functions, mostly for reading and writing the members
> of the map and layer structures.  I've put further ASP work on
> hold until I see what Steve comes up with MapScript (and I'm
> busy working thru a bug in setting map extents with ASP)
>
> If you want some more details, let me know...
>
> Brent Fraser
>
> ----- Original Message -----
> From: Banister Trevor <TBanister at SpaceImaging.com>
> To: <mapserver-users at lists.gis.umn.edu>
> Sent: Monday, July 12, 1999 10:35 AM
> Subject: ActiveX version of Mapserver
>
>
> > I've heard rumors about someone compiling Mapserver as an ActiveX ASP
> > component. I've thought of doing this myself, but if someone has already
> > done a port I won't re-invent the wheel. Does anyone know of such an
> effort,
> > and if the code or binary is available?
> >
> > Thanks.
> >
> > Trevor Banister
> >
>



From imap at chesapeake.net  Mon Jul 12 12:16:28 1999
From: imap at chesapeake.net (imap at chesapeake.net)
Date: Mon, 12 Jul 1999 15:16:28 -0400
Subject: ActiveX version of Mapserver
References: <009b01becc89$6735fd90$390002c0@servo>
Message-ID: <378A3F0C.C9AE64C9@chesapeake.net>



About this ActiveX version... Are we talking about
setting up COM (Component Object Model) for mapserv?
I think that MapScript may be for the benefit of
perl users, but the object access part of Steve's
MapScript design may be extensible in the Microsoft
world.   Steve, can you give us a heads-up about the
construction of Mapscript (components/structures/
objects/access/etc) to get some ideas?  I'd like to
see the ActiveX component evolve with the same 
idea as MapScript.  It should be very similar one would
hope.

Thanks,

-Chris (imap at chesapeake.net)
  


Brent Fraser wrote:
> 
> ----- Original Message -----
> From: Brent Fraser <bfraser at geoanalytic.com>
> To: Banister Trevor <TBanister at SpaceImaging.com>
> Sent: Monday, July 12, 1999 10:58 AM
> Subject: Re: ActiveX version of Mapserver
> 
> > I've done some work along the ASP line.  I've only implemented
> > a few functions, mostly for reading and writing the members
> > of the map and layer structures.  I've put further ASP work on
> > hold until I see what Steve comes up with MapScript (and I'm
> > busy working thru a bug in setting map extents with ASP)
> >
> > If you want some more details, let me know...
> >
> > Brent Fraser
> >
> > ----- Original Message -----
> > From: Banister Trevor <TBanister at SpaceImaging.com>
> > To: <mapserver-users at lists.gis.umn.edu>
> > Sent: Monday, July 12, 1999 10:35 AM
> > Subject: ActiveX version of Mapserver
> >
> >
> > > I've heard rumors about someone compiling Mapserver as an ActiveX ASP
> > > component. I've thought of doing this myself, but if someone has already
> > > done a port I won't re-invent the wheel. Does anyone know of such an
> > effort,
> > > and if the code or binary is available?
> > >
> > > Thanks.
> > >
> > > Trevor Banister
> > >
> >


From steve.lime at dnr.state.mn.us  Mon Jul 12 13:07:30 1999
From: steve.lime at dnr.state.mn.us (Stephen Lime)
Date: Mon, 12 Jul 1999 15:07:30 -0500
Subject: ActiveX version of Mapserver
Message-ID: <s78a04d3.088@smtp.dnr.state.mn.us>

Here's what I've got going so far, objects and methods. There are too many object members
to list, so I won't. My goal is to allow read/write access to everything. For most things this is
real simple, but things like arrays (char ** for projection args) are tedious. Anyway here are
the supported objects:

  object: map
     methods: new
                    getExtent
                    setExtent
                    getLayer
                    addLayer
                    addColor
                    getProjection
                    setProjection
                    draw
                    drawScalebar
                    drawLegend
                    and so on...

  object: layer
    methods: draw
                    getClass
                    addClass
                    getQuery
                    addQuery
                    getProjection
                    setProjection

The methods are only for non-standard C datatypes so most things can be changed simply
using Perls object oriented notation. For example, here's a code snippet to change the
status of a scalebar:

  $map = new mapObj("foo.map");
  $map->{scalebar}->{status} = MS_TRUE;

Here's a snippet to turn each layer on:

  $map = new mapObj("foo.map");
  for($i=0; $i < $map->{nLayers}; $i++) {
    $layer = $map->getLayer($i);
    $layer->{status} = MS_ON;
  }
  
In addition to the objects users are used to seeing in mapfiles (eg. legends, layers...) there
are some spatial data primitives for points, lines and polygons. Each object type will have
a constructor, some population methods (eg. $line->addPoint($x, $y) or $poly->addLine($line)),
and a draw method ($poly->draw($map)). These constructs will be especially usefull as you'll
be able to populate them from a number of sources (eg. oracle or text files). Then you can 
sandwich them between traditional shapefile or raster layers.

There also will be an object and methods associated with queries results but I haven't gotten
that far yet.

The goal, at least of the mapping piece is an image object that most likely would be saved as
an GIF image. This datatype is also used by several other perl modules so even more custom
annotation possiblities exist. For example, one could process a request that generates a map
and a query against some database. Query results could be graphed and imbeded in the map
using the GD.pm module. Does this help?

Steve

Stephen Lime
Internet Applications Analyst
MIS Bureau - MN DNR

(651) 297-2937
steve.lime at dnr.state.mn.us

>>> <imap at chesapeake.net> 07/12 2:16 PM >>>

About this ActiveX version... Are we talking about
setting up COM (Component Object Model) for mapserv?
I think that MapScript may be for the benefit of
perl users, but the object access part of Steve's
MapScript design may be extensible in the Microsoft
world.   Steve, can you give us a heads-up about the
construction of Mapscript (components/structures/
objects/access/etc) to get some ideas?  I'd like to
see the ActiveX component evolve with the same 
idea as MapScript.  It should be very similar one would
hope.

Thanks,

-Chris (imap at chesapeake.net)
  


Brent Fraser wrote:
> 
> ----- Original Message -----
> From: Brent Fraser <bfraser at geoanalytic.com>
> To: Banister Trevor <TBanister at SpaceImaging.com>
> Sent: Monday, July 12, 1999 10:58 AM
> Subject: Re: ActiveX version of Mapserver
> 
> > I've done some work along the ASP line.  I've only implemented
> > a few functions, mostly for reading and writing the members
> > of the map and layer structures.  I've put further ASP work on
> > hold until I see what Steve comes up with MapScript (and I'm
> > busy working thru a bug in setting map extents with ASP)
> >
> > If you want some more details, let me know...
> >
> > Brent Fraser
> >
> > ----- Original Message -----
> > From: Banister Trevor <TBanister at SpaceImaging.com>
> > To: <mapserver-users at lists.gis.umn.edu>
> > Sent: Monday, July 12, 1999 10:35 AM
> > Subject: ActiveX version of Mapserver
> >
> >
> > > I've heard rumors about someone compiling Mapserver as an ActiveX ASP
> > > component. I've thought of doing this myself, but if someone has already
> > > done a port I won't re-invent the wheel. Does anyone know of such an
> > effort,
> > > and if the code or binary is available?
> > >
> > > Thanks.
> > >
> > > Trevor Banister
> > >
> >


From bfraser at digitalscience.com  Mon Jul 12 13:36:49 1999
From: bfraser at digitalscience.com (Brent Fraser)
Date: Mon, 12 Jul 1999 14:36:49 -0600
Subject: ActiveX version of Mapserver
References: <009b01becc89$6735fd90$390002c0@servo> <378A3F0C.C9AE64C9@chesapeake.net>
Message-ID: <005201becca6$45c999b0$390002c0@servo>

Chris (and everyone),

I think the software development philosophy Steve
has been following is good: generic  C / CGI usable
on Unix and NT.

Some kind of scripting would give more control for
a more dynamic mapping environment, and it
would be nice to have COM, CORBA, and MapScript
support.  And it would make sense to have a common
definition for the object interface to be consistent
(if possible), as long as it wasn't too much effort.

On a related note, I seem to be getting some interest
in using MapServer to produce a background
"basemap", but also having some client-end functions
for creating points, lines, polygons in a server-side
database.  I've been thinking about using Java on
the client and either JDBC, Java servlets or RMI
on the server.  Or maybe MapServer is fast enough
to get the feedback if there was a database (Oracle)
connection.  I see that Trevor and Cameron have
similar interests to this.

Brent

----- Original Message -----
From: <imap at chesapeake.net>
To: mapserver-users <mapserver-users at lists.gis.umn.edu>
Sent: Monday, July 12, 1999 1:16 PM
Subject: Re: ActiveX version of Mapserver


>
>
> About this ActiveX version... Are we talking about
> setting up COM (Component Object Model) for mapserv?
> I think that MapScript may be for the benefit of
> perl users, but the object access part of Steve's
> MapScript design may be extensible in the Microsoft
> world.   Steve, can you give us a heads-up about the
> construction of Mapscript (components/structures/
> objects/access/etc) to get some ideas?  I'd like to
> see the ActiveX component evolve with the same
> idea as MapScript.  It should be very similar one would
> hope.
>
> Thanks,
>
> -Chris (imap at chesapeake.net)
>
>
>
> Brent Fraser wrote:
> >
> > ----- Original Message -----
> > From: Brent Fraser <bfraser at geoanalytic.com>
> > To: Banister Trevor <TBanister at SpaceImaging.com>
> > Sent: Monday, July 12, 1999 10:58 AM
> > Subject: Re: ActiveX version of Mapserver
> >
> > > I've done some work along the ASP line.  I've only implemented
> > > a few functions, mostly for reading and writing the members
> > > of the map and layer structures.  I've put further ASP work on
> > > hold until I see what Steve comes up with MapScript (and I'm
> > > busy working thru a bug in setting map extents with ASP)
> > >
> > > If you want some more details, let me know...
> > >
> > > Brent Fraser
> > >
> > > ----- Original Message -----
> > > From: Banister Trevor <TBanister at SpaceImaging.com>
> > > To: <mapserver-users at lists.gis.umn.edu>
> > > Sent: Monday, July 12, 1999 10:35 AM
> > > Subject: ActiveX version of Mapserver
> > >
> > >
> > > > I've heard rumors about someone compiling Mapserver as an ActiveX
ASP
> > > > component. I've thought of doing this myself, but if someone has
already
> > > > done a port I won't re-invent the wheel. Does anyone know of such an
> > > effort,
> > > > and if the code or binary is available?
> > > >
> > > > Thanks.
> > > >
> > > > Trevor Banister
> > > >
> > >
>



From camerons at cat.org.au  Wed Jul 14 14:25:25 1999
From: camerons at cat.org.au (Cameron Shorter)
Date: Thu, 15 Jul 1999 07:25:25 +1000
Subject: Error logging
Message-ID: <m114WaH-000YeBC@mailarray.mpx.com.au>

Hi,
Still going with my installation / debugging.
Using shp2gif and gdb I discovered that one of my directories was set up
incorrectly.

I'm wondering, is there a way to enable to messages that are created by
msSetError to be put into the logs?

If not, I'm prepared to code it up.  What is the procedure for adding to
the code base?

PS.  I'm now getting an error message refering to a .idx file.  What is a
.idx file?


Cameron Shorter
61.2.9901-1596 work.


From imap at chesapeake.net  Wed Jul 14 17:59:33 1999
From: imap at chesapeake.net (imap at chesapeake.net)
Date: Wed, 14 Jul 1999 20:59:33 -0400
Subject: Error logging
References: <m114WaH-000YeBC@mailarray.mpx.com.au>
Message-ID: <378D3275.69A353A6@chesapeake.net>



An idx file is an index files created with "shpindex".   If a .idx
existing for a given shapefile layer, mapserv will try to make use
of it.  If it is having problems with the .idx file, just delete it.

The "shpindex" seems to work okay on big endian machines and Linux,
but for some reason... not for NT.

-Chris

Cameron Shorter wrote:
> 
> Hi,
> Still going with my installation / debugging.
> Using shp2gif and gdb I discovered that one of my directories was set up
> incorrectly.
> 
> I'm wondering, is there a way to enable to messages that are created by
> msSetError to be put into the logs?
> 
> If not, I'm prepared to code it up.  What is the procedure for adding to
> the code base?
> 
> PS.  I'm now getting an error message refering to a .idx file.  What is a
> .idx file?
> 
> Cameron Shorter
> 61.2.9901-1596 work.


From cshorte2 at csc.com  Wed Jul 21 15:37:23 1999
From: cshorte2 at csc.com (cshorte2 at csc.com)
Date: Thu, 22 Jul 1999 08:37:23 +1000
Subject: Extents of a raster image
Message-ID: <4A2567B5.007BF334.00@csc.com>

How do I specify the extent of a raster image?




From bfraser at digitalscience.com  Wed Jul 21 16:43:06 1999
From: bfraser at digitalscience.com (Brent Fraser)
Date: Wed, 21 Jul 1999 17:43:06 -0600
Subject: Extents of a raster image
References: <4A2567B5.007BF334.00@csc.com>
Message-ID: <001901bed3d2$cba47c20$500202c0@cghh1.ab.wave.home.com>

If you mean how do you geo-reference a
raster image so MapServer places it correctly,
there are two ways:

    1. make the raster image a GeoTIFF
    2. create a "world" file for the image.

I've had better luck with the world file approach,
since not all applications read and write tiff tags
correctly.

Below is a short description of both.  If I
mis-understood your question, sorry for the
verbosity...

Brent
---------------------------------------------------------------------------
A TFW file is a short six line ASCII file that accompanies
a standard TIFF file to do basically the same thing as the
tags in a GeoTIFF (geo-reference a tiff image).

The format of an ESRI world file (*.tfw) is six values (one
per line) in an ascii file:

 pixel x size
 rotation about the y axis
 rotation about the x axis
 - pixel y size
 x of upper left pixel
 y of upper left pixel

For example:
--------------------------------
25
0.000000000000
0.000000000000
-25
657662.921000
6125428.836672
--------------------------------

The rotation values are always set to zero (until ESRI
supports rotation of raster files).   Note that the world
file has the same name as the TIFF file, but with an
extension of ".tfw".

GeoTiff uses the tiff format, with special tags embedded
right in the tiff file.  The tag numbers and what they
represent are:

33550 (0x830e)   <pixel x size> <pixel y size> <>
33922 (0x8482)    <> <> <> <x of upper left pixel> <y of upper left pixel>
<>

    There are a number of applications which will
display the GeoTIFF tags (Graphic Workshop is a
shareware example)


Brent Fraser
bfraser at geoanalytic.com



----- Original Message -----
From: <cshorte2 at csc.com>
To: <mapserver-users at lists.gis.umn.edu>
Sent: Wednesday, July 21, 1999 4:37 PM
Subject: Extents of a raster image


> How do I specify the extent of a raster image?
>
>
>



From steve.lime at dnr.state.mn.us  Wed Jul 21 22:02:28 1999
From: steve.lime at dnr.state.mn.us (Stephen Lime)
Date: Thu, 22 Jul 1999 00:02:28 -0500
Subject: Extents of a raster image
Message-ID: <s7965fa6.076@smtp.dnr.state.mn.us>

A good explanation. I must add that the mapserver expects world files to have the extension .wld and does not support the convoluted naming conventions of ESRI pre-arcview 3.1. This make life easier coding wise and makes the same world file usable with a variety of formats. Nice for testing anyway.

Steve

<<< "Brent Fraser" <bfraser at digitalscience.com>  7/21  6:40p >>>
If you mean how do you geo-reference a
raster image so MapServer places it correctly,
there are two ways:

    1. make the raster image a GeoTIFF
    2. create a "world" file for the image.

I've had better luck with the world file approach,
since not all applications read and write tiff tags
correctly.

Below is a short description of both.  If I
mis-understood your question, sorry for the
verbosity...

Brent
---------------------------------------------------------------------------
A TFW file is a short six line ASCII file that accompanies
a standard TIFF file to do basically the same thing as the
tags in a GeoTIFF (geo-reference a tiff image).

The format of an ESRI world file (*.tfw) is six values (one
per line) in an ascii file:

 pixel x size
 rotation about the y axis
 rotation about the x axis
 - pixel y size
 x of upper left pixel
 y of upper left pixel

For example:
--------------------------------
25
0.000000000000
0.000000000000
-25
657662.921000
6125428.836672
--------------------------------

The rotation values are always set to zero (until ESRI
supports rotation of raster files).   Note that the world
file has the same name as the TIFF file, but with an
extension of ".tfw".

GeoTiff uses the tiff format, with special tags embedded
right in the tiff file.  The tag numbers and what they
represent are:

33550 (0x830e)   <pixel x size> <pixel y size> <>
33922 (0x8482)    <> <> <> <x of upper left pixel> <y of upper left pixel>
<>

    There are a number of applications which will
display the GeoTIFF tags (Graphic Workshop is a
shareware example)


Brent Fraser
bfraser at geoanalytic.com



----- Original Message -----
From: <cshorte2 at csc.com>
To: <mapserver-users at lists.gis.umn.edu>
Sent: Wednesday, July 21, 1999 4:37 PM
Subject: Extents of a raster image


> How do I specify the extent of a raster image?
>
>
>




From cshorte2 at csc.com  Wed Jul 21 22:37:49 1999
From: cshorte2 at csc.com (cshorte2 at csc.com)
Date: Thu, 22 Jul 1999 15:37:49 +1000
Subject: Extents of a raster image
Message-ID: <4A2567B6.001EE58C.00@csc.com>

Thankyou, this is just what I wanted to know.

> There are a number of applications which will
> display the GeoTIFF tags (Graphic Workshop is a
> shareware example)
Is there a free package that I can use to insert GeoTIFF tags?
I'm trying to keep the product I'm working on as free
as possible.




From bfraser at digitalscience.com  Thu Jul 22 07:20:47 1999
From: bfraser at digitalscience.com (Brent Fraser)
Date: Thu, 22 Jul 1999 08:20:47 -0600
Subject: Extents of a raster image
References: <4A2567B6.001EE58C.00@csc.com>
Message-ID: <000501bed44d$656041d0$390002c0@servo>

I've never used them, but here's a couple of sources:

There is a utility - geotifcp that will add GeoTIFF information to a TIFF
ftp://gdal.velocet.ca/pub/tiff/

http://www.mentorsoftwareinc.com/FREEBIE/FREE0699.HTM
reads and writes geotiffs and world files.

Brent

----- Original Message ----- 
From: <cshorte2 at csc.com>
To: <mapserver-users at lists.gis.umn.edu>
Sent: Wednesday, July 21, 1999 11:37 PM
Subject: Re: Extents of a raster image


> Thankyou, this is just what I wanted to know.
> 
> > There are a number of applications which will
> > display the GeoTIFF tags (Graphic Workshop is a
> > shareware example)
> Is there a free package that I can use to insert GeoTIFF tags?
> I'm trying to keep the product I'm working on as free
> as possible.
> 
> 
> 



From camerons at cat.org.au  Fri Jul 23 04:40:34 1999
From: camerons at cat.org.au (Cameron Shorter)
Date: Fri, 23 Jul 1999 21:40:34 +1000
Subject: Extents of a raster image
In-Reply-To: <000501bed44d$656041d0$390002c0@servo>
References: <4A2567B6.001EE58C.00@csc.com>
Message-ID: <m117dkN-000GkTC@mailarray.mpx.com.au>

At 08:20 AM 22-07-99 -0600, Brent Fraser wrote:
>http://www.mentorsoftwareinc.com/FREEBIE/FREE0699.HTM
>reads and writes geotiffs and world files.

Thanks Brent, I checked out this package. It was simple, putting geo data
in a tiff file or .tfw file.  Just what I wanted.

I have successfully added a geotif file to my map now, however using a
standard .tif file and .tfw file didn't work.  This doesn't particularly
worry me as I have something working.  I'm just mentioning it in case it is
a bug.

My .map file contained:

LAYER
  NAME "topo25k"
  TYPE RASTER
  STATUS ON
  DATA topo25k.tif
  #OFFSITE 0
END # Layer

The geotiff file can be found at:
http://www.cat.org.au/bikeast/camerons/topo25k.tif

The same file without geo data can be found at:
http://www.cat.org.au/bikeast/camerons/topo25k.tif.bak

and the top25k.tfw file contains:
                8.2e-005
                       0
                       0
              -9.01e-005
                151.1703
                -33.8657


Cameron Shorter
61.2.9901-1596 work.


From bfraser at digitalscience.com  Fri Jul 23 05:42:32 1999
From: bfraser at digitalscience.com (Brent Fraser)
Date: Fri, 23 Jul 1999 06:42:32 -0600
Subject: Extents of a raster image
References: <4A2567B6.001EE58C.00@csc.com> <m117dkN-000GkTC@mailarray.mpx.com.au>
Message-ID: <001101bed508$d74c2960$500202c0@cghh1.ab.wave.home.com>

As Steve had pointed out, MapServer looks for
an extension of wld for the world file (the tfw
thing works for some ESRI products).


----- Original Message -----
From: Cameron Shorter <camerons at cat.org.au>
To: <mapserver-users at lists.gis.umn.edu>
Sent: Friday, July 23, 1999 5:40 AM
Subject: Re: Extents of a raster image


> At 08:20 AM 22-07-99 -0600, Brent Fraser wrote:
> >http://www.mentorsoftwareinc.com/FREEBIE/FREE0699.HTM
> >reads and writes geotiffs and world files.
>
> Thanks Brent, I checked out this package. It was simple, putting geo data
> in a tiff file or .tfw file.  Just what I wanted.
>
> I have successfully added a geotif file to my map now, however using a
> standard .tif file and .tfw file didn't work.  This doesn't particularly
> worry me as I have something working.  I'm just mentioning it in case it
is
> a bug.
>
> My .map file contained:
>
> LAYER
>   NAME "topo25k"
>   TYPE RASTER
>   STATUS ON
>   DATA topo25k.tif
>   #OFFSITE 0
> END # Layer
>
> The geotiff file can be found at:
> http://www.cat.org.au/bikeast/camerons/topo25k.tif
>
> The same file without geo data can be found at:
> http://www.cat.org.au/bikeast/camerons/topo25k.tif.bak
>
> and the top25k.tfw file contains:
>                 8.2e-005
>                        0
>                        0
>               -9.01e-005
>                 151.1703
>                 -33.8657
>
>
> Cameron Shorter
> 61.2.9901-1596 work.
>



From steve.lime at dnr.state.mn.us  Fri Jul 23 11:03:44 1999
From: steve.lime at dnr.state.mn.us (Stephen Lime)
Date: Fri, 23 Jul 1999 13:03:44 -0500
Subject: Extents of a raster image
Message-ID: <s7986841.077@smtp.dnr.state.mn.us>

World files *MUST* have the extension .wld. ESRI's convoluted naming conventions
for world files are not supported.

Stephen Lime
Internet Applications Analyst
MIS Bureau - MN DNR

(651) 297-2937
steve.lime at dnr.state.mn.us

>>> Cameron Shorter <camerons at cat.org.au> 07/23 6:40 AM >>>
At 08:20 AM 22-07-99 -0600, Brent Fraser wrote:
>http://www.mentorsoftwareinc.com/FREEBIE/FREE0699.HTM 
>reads and writes geotiffs and world files.

Thanks Brent, I checked out this package. It was simple, putting geo data
in a tiff file or .tfw file.  Just what I wanted.

I have successfully added a geotif file to my map now, however using a
standard .tif file and .tfw file didn't work.  This doesn't particularly
worry me as I have something working.  I'm just mentioning it in case it is
a bug.

My .map file contained:

LAYER
  NAME "topo25k"
  TYPE RASTER
  STATUS ON
  DATA topo25k.tif
  #OFFSITE 0
END # Layer

The geotiff file can be found at:
http://www.cat.org.au/bikeast/camerons/topo25k.tif 

The same file without geo data can be found at:
http://www.cat.org.au/bikeast/camerons/topo25k.tif.bak 

and the top25k.tfw file contains:
                8.2e-005
                       0
                       0
              -9.01e-005
                151.1703
                -33.8657


Cameron Shorter
61.2.9901-1596 work.



From Jsully7 at aol.com  Tue Jul 27 09:12:28 1999
From: Jsully7 at aol.com (Jsully7 at aol.com)
Date: Tue, 27 Jul 1999 12:12:28 EDT
Subject: Map Extents
Message-ID: <f8c0c00.24cf346c@aol.com>

I would like to know what is the best method for specifing the EXTENTS for 
Geographic Decimal Degree Shape files (non-projected).  Is this even 
possible?  I am using Mapserver 3.2.  

Jim Sullivan
jsully7 at aol.com


From steve.lime at dnr.state.mn.us  Tue Jul 27 09:32:13 1999
From: steve.lime at dnr.state.mn.us (Stephen Lime)
Date: Tue, 27 Jul 1999 11:32:13 -0500
Subject: Map Extents
Message-ID: <s79d98dc.082@smtp.dnr.state.mn.us>

You can use DD but anything scale related will be useless. The mapserver will
map directly from the DD coordinates to the flat graphic coordinates. For small
areas this is usually ok, but you'll definitely see distortions. Extents need to be
in the following order minx, miny, maxx, maxy. Depending on where you are in 
the world you may need to negate the lat and/or lon values to maintain that
relationship. For North America the longitude values should be negative (I think
that is correct).

Alternatively, you can either pre-project your data or project on-the-fly by compiling
with the PROJ.4 library available from the USGS and then specifying input
and output projection information. I can provide more information if anyone is
interested.

Steve

Stephen Lime
Internet Applications Analyst
MIS Bureau - MN DNR

(651) 297-2937
steve.lime at dnr.state.mn.us

>>> <Jsully7 at aol.com> 07/27 11:12 AM >>>
I would like to know what is the best method for specifing the EXTENTS for 
Geographic Decimal Degree Shape files (non-projected).  Is this even 
possible?  I am using Mapserver 3.2.  

Jim Sullivan
jsully7 at aol.com



From steve.lime at dnr.state.mn.us  Fri Jul 30 11:57:22 1999
From: steve.lime at dnr.state.mn.us (Stephen Lime)
Date: Fri, 30 Jul 1999 13:57:22 -0500
Subject: map legend fix...
Message-ID: <s7a1af51.009@smtp.dnr.state.mn.us>

Hi: Some of you using 3.21x or higher may have noticed a label offset problem
when creating legends. I've attached a new version of maplegend.c that fixes
the offset problem. Multiline legend labels still don't work correctly and I will have
that fixed in version 3.3. TrueType font sizes should be equal to or smaller than
the key height. Real large fonts relative to the keys can result in text overlap
(and ugly legends even if displayed properly). Again the fix will appear in 3.3
but really shouldn't impact anyone at all.

To apply the fix. Copy the new file into the mapserver source directory and
do a "make clean" followed by a "make". You'll need to replace your old
binaries with the new versions and that should do it.

Steve

Stephen Lime
Internet Applications Analyst
MIS Bureau - MN DNR

(651) 297-2937
steve.lime at dnr.state.mn.us

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From piero at innova.it  Sat Jul 31 12:10:48 1999
From: piero at innova.it (Pierluigi Vittori)
Date: Sat, 31 Jul 1999 21:10:48 +0200
Subject: Question from a new user
Message-ID: <99073111250000.00649@buzz.myhouse.net>

Hi all!
I have been using mapserver for a few days and have discovered how good it
works!
I am no GIS expert nor have I looked in depth into all mapserver features and
source code so it might be that my question is a simple matter of RTFM :))
I would like to perform a text search in the dbf file (i.e. for a specific
street in the map) and consequently center a new map on such a street together
with a symbol placed on it.
My question is: is it possible to do this with the present version of
mapserver? Do I need any extra coding?

Thanks in advance for your help.

Piero