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StartFragment-->
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">We
are using an openlayers frontend to utilize mapserver via
phpmapscript to read
some colorized tif files we have made, and then render a png
file on a webpage
via gdal.<span style="mso-spacerun:yes"> </span>This process
seems to work
about 95% of the time, The other 5%, we are getting no images
and errors kicked
out to the httpd error log. Based on the errors below, it seems
to be occurring
when mapserver issues the $map->draw() command, and kicks out
some GDAL
errors.<span style="mso-spacerun:yes"> </span>When this
happens, there is no
png image that gets created. Ive included the following
directives in the map
file to help with debugging CONFIG "CPL_DEBUG" "ON",
and<span style="mso-spacerun:yes"> </span>CONFIG
"MS_ERRORFILE" =
/home/logfile<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">Any
help on what may be happening here?<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><b style="mso-bidi-font-weight:normal"><span
style="font-size:12.0pt;
font-family:"Times New Roman","serif"">When
it succeeds I see a message like
this in the httpd error logs:<o:p></o:p></span></b></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">GDAL:
GDALOpen(/home/cache/2012021913-2012022013.tif,
this=0x2b5e6a5abda0) succeeds
as GTiff<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><b style="mso-bidi-font-weight:normal"><span
style="font-size:12.0pt;
font-family:"Times New Roman","serif"">When
it fails, I see a string of errors,
such as:<o:p></o:p></span></b></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">GDAL:
GDALClose(/home/cache/2012021913-2012022013.tif,
this=0x2b5e6fd12890)<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">[Mon
Feb 20 14:41:18 2012] [error] [client xxx.xxx.xxx.xxx] PHP
Warning:<span style="mso-spacerun:yes"> </span>[MapServer
Error]: msDrawMap(): Failed to
draw layer named 'map_data'.\n in /home/www/testmscross.php on
line 231<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">[Mon
Feb 20 14:41:18 2012] [error] [client xxx.xxx.xxx.xxx] PHP
Warning:<span style="mso-spacerun:yes"> </span>[MapServer
Error]: GetBlockRef failed at X
block offset 0, Y block offset 0: GDALDatasetRasterIO() failed:
drawGDAL()\n in
/home/www/testmscross.php on line 231<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">[Mon
Feb 20 14:41:18 2012] [error] [client xxx.xxx.xxx.xxx] PHP
Warning:<span style="mso-spacerun:yes"> </span>[MapServer
Error]: msDrawMap(): Failed to
draw layer named 'map_data'.\n in /home/www/testmscross.php on
line 231<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">[Mon
Feb 20 14:41:18 2012] [error] [client xxx.xxx.xxx.xxx] PHP
Warning:<span style="mso-spacerun:yes"> </span>[MapServer
Error]: GetBlockRef failed at X
block offset 0, Y block offset 0: GDALDatasetRasterIO() failed:
drawGDAL()\n in
/home/www/testmscross.php on line 231<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">[Mon
Feb 20 14:41:18 2012] [error] [client xxx.xxx.xxx.xxx] PHP Fatal
error:<span style="mso-spacerun:yes"> </span>Call to a member
function saveImage() on a
non-object in /home/www/testmscross.php on line 270<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><b style="mso-bidi-font-weight:normal"><span
style="font-size:12.0pt;
font-family:"Times New Roman","serif"">gdalinfo
on the tiff files yields</span></b><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif"">:<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">Driver:
GTiff/GeoTIFFC<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">Files:
/home/cache/2012021913-2012022013.tif<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">Size
is 181, 132<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">Coordinate
System is `'<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">Origin
= (2172891.879999999888241,-5178906.330000000074506)<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">Pixel
Size = (4772.703535911604376,-4764.676212121210483)<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">Image
Structure Metadata:<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif""><span style="mso-spacerun:yes">
</span>INTERLEAVE=PIXEL<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">Corner
Coordinates:<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">Upper
Left<span style="mso-spacerun:yes"> </span>(
2172891.880,-5178906.330) <o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">Lower
Left<span style="mso-spacerun:yes"> </span>(
2172891.880,-5807843.590) <o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">Upper
Right ( 3036751.220,-5178906.330) <o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">Lower
Right ( 3036751.220,-5807843.590) <o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">Center<span
style="mso-spacerun:yes"> </span>(
2604821.550,-5493374.960) <o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">Band
1 Block=181x15 Type=Byte, ColorInterp=Red<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif""><span style="mso-spacerun:yes">
</span>NoData Value=-1<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">Band
2 Block=181x15 Type=Byte, ColorInterp=Green<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif""><span style="mso-spacerun:yes">
</span>NoData Value=-1<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">Band
3 Block=181x15 Type=Byte, ColorInterp=Blue<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif""><span style="mso-spacerun:yes">
</span>NoData Value=-1<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><b style="mso-bidi-font-weight:normal"><span
style="font-size:12.0pt;
font-family:"Times New Roman","serif"">and
mapserv -v yields:<o:p></o:p></span></b></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif"">MapServer
version 5.6.7 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP
OUTPUT=SVG
SUPPORTS=PROJ SUPPORTS=AGG SUPPORTS=FREETYPE SUPPORTS=ICONV
SUPPORTS=WMS_SERVER
SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT
SUPPORTS=WCS_SERVER
SUPPORTS=THREADS INPUT=EPPL7 INPUT=OGR INPUT=GDAL INPUT=MYGIS
INPUT=SHAPEFILE<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-size:12.0pt;font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><b style="mso-bidi-font-weight:normal"><span
style="font-size:12.0pt;
font-family:"Times New Roman","serif"">Mapserver
compiled with:<o:p></o:p></span></b></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-family:"Times New
Roman","serif"">./configure
--with-zlib --with-png --with-jpeg --with-gd --with-proj
--with-threads
--with-ogr=/usr/local/gdal-config
--with-gdal=/usr/local/gdal-config
--with-tiff --with-mygis --with-wfs --with-wcs --with-wmsclient
--with-wfsclient --with-httpd=/usr/sbin/httpd
--with-php=/usr/include/php<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><b style="mso-bidi-font-weight:normal"><span
style="font-family:"Times New
Roman","serif"">gdal
information:<o:p></o:p></span></b></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-family:"Times New
Roman","serif"">[root]#./gdal-config
–version<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-family:"Times New
Roman","serif"">1.7.3<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-family:"Times New
Roman","serif"">[root]# ./gdal-config
--dep-libs --version<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-family:"Times New
Roman","serif"">-L/usr/local/lib
-lgeos_c -L/usr/lib -lsqlite3 -L/usr/lib64 -L/usr/lib64/lib
-lodbc -lodbcinst
-L/usr/lib64 -L/usr/lib64/lib -lgif -L/usr/lib64
-L/usr/lib64/lib -ljpeg
-L/usr/lib64/lib -ltiff -L/usr/lib64 -L/usr/lib64/lib -lpng
-L/usr/local/
-L/usr/local//lib -lnetcdf -L/usr/local/lib -L/usr/local/lib/lib
-lcfitsio -lz
-L/usr/lib64/ -L/usr/lib64//lib -lm -lrt -ldl
-L/usr/kerberos/lib64 -lcurl -ldl
-lgssapi_krb5 -lkrb5 -lk5crypto -lcom_err -lidn -lssl -lcrypto
-lz -rdynamic
-L/usr/lib64/mysql -lmysqlclient -lz -lcrypt -lnsl -lm
-L/usr/lib64 -lssl –lcrypto<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-family:"Times New
Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-family:"Times New
Roman","serif"">[root]#
./gdal-config --formats<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal"><span style="font-family:"Times New
Roman","serif"">gxf gtiff hfa
aigrid aaigrid ceos ceos2 iso8211 xpm sdts raw dted mem jdem
envisat elas fit
vrt usgsdem l1b nitf bmp pcidsk airsar rs2 ilwis rmf leveller
sgi srtmhgt
idrisi gsg ingr ers jaxapalsar dimap gff cosar pds adrg coasp
tsx terragen blx
msgn til r northwood saga wcs wms grib bsb gif jpeg png netcdf
pcraster fits
rik rasterlite<o:p></o:p></span></p>
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