[Mapserver-users] problems with JPEG / GDAL

Thu Jul 24 15:22:53 PDT 2003

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Hi,

We are using mapserver and trying to draw a map which includes a layer
with raster information as JPEG file. When we call the CGI we get the
following answer:

drawJPEG(): Unable to access file. Only grayscale JPEG images are
supported.

We are aware that the built-in capabilities of mapserver have this
restriction. However, we have installed mapserver WITH GDAL support,
which supposedly doesn't have that limitation. Can anybody tell us how
to force mapserver to use GDAL? The examples we run with other data
formats in our server (tiff, etc) work fine.

Our compilation is the following:

./mapserv -v
MapServer version 3.6.5 OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP SUPPORTS=TTF
INPUT=EPPL7 INPUT=JPEG INPUT=POSTGIS INPUT=GDAL INPUT=SHAPEFILE

Redhat 8.0, apache 2.0.45.

Many thanks.

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style=3D'tab-interval:35.4pt'>

<div class=3DSection1>

<p class=3DMsoNormal><span class=3DSpellE><font size=3D2 color=3Dblack =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;color:black'>Hi</span></font>=
</span><font
size=3D2 color=3Dblack face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial;
color:black'>,<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dblack face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:black'><o:p> </o:p></span></font></p>=

We
are using mapserver and trying to draw a map =
which
includes a layer with raster information as JPEG file. When we call the =
CGI we
get the following answer:<o:p></o:p>

<p class=3DMsoNormal><font size=3D2 color=3Dblack face=3DArial><span =
lang=3DEN-GB
style=3D'font-size:10.0pt;font-family:Arial;color:black;mso-ansi-language=
:EN-GB'><o:p> </o:p></span></font></p>

drawJPEG<=
/span>(): Unable to =
access
file. Only grayscale JPEG images are =
supported.<o:p></o:p>

<p class=3DMsoNormal><font size=3D2 color=3Dblack face=3DArial><span =
lang=3DEN-GB
style=3D'font-size:10.0pt;font-family:Arial;color:black;mso-ansi-language=
:EN-GB'><o:p> </o:p></span></font></p>

We
are aware that the built-in capabilities of mapserver
have this restriction. However, we have installed mapserver
WITH GDAL support, which supposedly doesn’t have that limitation. =
Can
anybody tell us how to force mapserver to =
use GDAL? The
examples we run with other data formats in our server (tiff, etc) work =
fine.<o:p></o:p>

<p class=3DMsoNormal><font size=3D2 color=3Dblack face=3DArial><span =
lang=3DEN-GB
style=3D'font-size:10.0pt;font-family:Arial;color:black;mso-ansi-language=
:EN-GB'><o:p> </o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dblack face=3DArial><span =
lang=3DEN-GB
style=3D'font-size:10.0pt;font-family:Arial;color:black;mso-ansi-language=
:EN-GB'>Our
compilation is the following:<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dblack face=3DArial><span =
lang=3DEN-GB
style=3D'font-size:10.0pt;font-family:Arial;color:black;mso-ansi-language=
:EN-GB'><o:p> </o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dblack face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:black'>./<span class=3DSpellE><span =
class=3DGramE>mapserv</span></span>
–v<o:p></o:p></span></font></p>

<p class=3DMsoNormal><span class=3DSpellE><font size=3D2 color=3Dblack =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;color:black'>MapServer</span>=
</font></span><font
size=3D2 color=3Dblack face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial;
color:black'> <span class=3DSpellE>version</span> 3.6.5 <span =
class=3DSpellE>OUTPUT=3DPNG</span>
<span class=3DSpellE>OUTPUT=3DJPEG</span> <span =
class=3DSpellE>OUTPUT=3DWBMP</span> <span
class=3DSpellE>SUPPORTS=3DTTF</span> <span =
class=3DSpellE>INPUT=3DEPPL7</span> <span
class=3DSpellE>INPUT=3DJPEG</span> <span =
class=3DSpellE>INPUT=3DPOSTGIS</span> <span
class=3DSpellE>INPUT=3DGDAL</span> <span =
class=3DSpellE>INPUT=3DSHAPEFILE</span><o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dblack face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:black'><o:p> </o:p></span></font></p>=

<p class=3DMsoNormal><span class=3DSpellE><font size=3D2 color=3Dblack =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;color:black'>Redhat</span></f=
ont></span><font
size=3D2 color=3Dblack face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial;
color:black'> 8.0, apache 2.0.45.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dblack face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:black'><o:p> </o:p></span></font></p>=

<p class=3DMsoNormal><span class=3DSpellE><font size=3D2 color=3Dblack =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;color:black'>Many</span></fon=
t></span><font
size=3D2 color=3Dblack face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial;
color:black'> <span =
class=3DSpellE>thanks</span>.<o:p></o:p></span></font></p>

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