[Mapserver-users] Fwd: ecw with MapServer

Tue Aug 19 08:29:00 PDT 2003

Message-Id: <000e01c35689$47769d50$7200a8c0 at pcesrsa3>
From: "roberto santinelli" <robertos at escsolution.it>
To: "Steve Lime" <steve.lime at dnr.state.mn.us>
Subject: ecw with MapServer
Date: Wed, 30 Jul 2003 12:56:50 +0200
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Hi Steve,

 hoping in your kind as well usefull help, let me ask you, or better depice=
 you a problem using MapServer (this is the 3.6.3 Version with GDAL library=
 and ECW format and many other ...).

I would like to render some air photos. The image source is a big tiff tile=
d file.
I converted this in to a 8 bit file and removed any kind of mask (e.g. alph=
a channel).

Pointing to this file (50MB the size) as well as indicated in the following=

LAYER
DATA DtmUmbriaF01_2/hills.tif
NAME hills
STATUS DEFAULT
TYPE RASTER
MINSCALE 45000
END #raster layer

i have the right effect.

Unluckly, after a compression with the plug in ECW Compressor 2.6 (ErMapper=
 Software) from this tif file and pointing to this new file ecw=20
(
LAYER
DATA DtmUmbriaF01_2/hills.ecw
NAME hills
STATUS DEFAULT
TYPE RASTER
MINSCALE 45000
END #raster layer
)

i have the tipical effect i had with a 24 bit tiff file: a distorsion of th=
e colors and under a given scale, a full black image.

Do you already met with this problem?
Perhaps you have idea about to overcome it?

Thanks in advance=20
Roberto Santinelli

fellow ship at CERN,
assistant research at Nuclear Physics department  of Perugia University
R&D coordinator at Consorzio ESC

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<DIV><FONT face=Arial size=2>Hi Steve,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2> hoping in your kind as well usefull help, let 
me ask you, or better depice you a problem using MapServer (this is the 3.6.3 
Version with GDAL library and ECW format and many other ...).</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I would like to render some air photos. The image 
source is a big tiff tiled file.</FONT></DIV>
<DIV><FONT face=Arial size=2>I converted this in to a 8 bit file and removed any 
kind of mask (e.g. alpha channel).</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Pointing to this file (50MB the size) as well as 
indicated in the following</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>LAYER<BR>DATA DtmUmbriaF01_2/hills.tif</FONT></DIV>
<DIV><FONT face=Arial size=2>NAME hills<BR>STATUS DEFAULT<BR>TYPE 
RASTER<BR>MINSCALE 45000<BR>END #raster layer</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>i have the right effect.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Unluckly, after a compression with the plug in ECW 
Compressor 2.6 (ErMapper Software) from this tif file and pointing to this new 
file ecw </FONT></DIV>
<DIV><FONT face=Arial size=2>(</FONT></DIV>
<DIV><FONT face=Arial size=2>LAYER<BR>DATA DtmUmbriaF01_2/hills.ecw<BR>NAME 
hills<BR>STATUS DEFAULT<BR>TYPE RASTER<BR>MINSCALE 45000<BR>END #raster 
layer</FONT></DIV>
<DIV><FONT face=Arial size=2>)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>i have the tipical effect i had with a 24 bit tiff 
file: a distorsion of the colors and under a given scale, a full 
black image.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Do you already met with this 
problem?</FONT></DIV>
<DIV><FONT face=Arial size=2>Perhaps you have idea about to overcome 
it?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Thanks in advance </FONT></DIV>
<DIV><FONT face=Arial size=2>Roberto Santinelli</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>fellow ship at CERN,</FONT></DIV>
<DIV><FONT face=Arial size=2>assistant research at Nuclear Physics 
department </FONT> of Perugia University</DIV>
<DIV><FONT face=Arial size=2>R&D coordinator at Consorzio 
ESC</FONT></DIV></BODY></HTML>

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