David,
You probably use the GDAL ECW driver (specifically the plugin) to draw the
ecw layer. To use the GDAL/OGR plugins in your application, you should
either copy the plugin dll-s into a /gdalplugins subdirectory from where
your application is running or (alternatively) set GDAL_DRIVER_PATH
environment variable to point to this location. To set this parameter
programmatically you should use Gdal.SetConfigOption instead of
SetenvironmentVariable which change is not visible by the getenv function
call used by GDAL.
You should also make sure to copy the correct version of libecwj2.dll into
your application directory (which is not necessarily the same as the
plugins directory).
Best regards,
Tamas
2013/5/29 David Lowther dlowt...@coordinatesolutions.com
Hi List,
** **
I’ve run into a bit of an issue. Using
release-1600-gdal-1-8-0-mapserver-5-6-6http://www.gisinternals.com/sdk/PackageList.aspx?file=release-1600-gdal-1-8-0-mapserver-5-6-6.zipin
my .Net project I cannot get ECW images to draw. I receive this error:
** **
msDrawMap(): Image handling error. Failed to draw layer named
'ecw'.;msDrawRaster(): Image handling error. Unrecognized or unsupported
image format;drawEPP(): Image handling error. EPPL7 support is not
available.
** **
I believe that this means that the ECW driver is not found and the EPPL7
is just the last one of the list that Mapserver tried to use.
** **
I am able to generate an image from the mapfile using both shp2img and
drawmap when the SDKShell.bat is executed, so I believe that the issue in
my .Net app is with environment variables not being set in the .Net
application. The application is a web application, but I experience the
same issue in a console application.
** **
I’ve tried the guidance from gis.stackexchange pointing to this gdal
advice:
https://bitbucket.org/bjartn/gdalgonewild/src/4be6d86fef24/src/GdalGoneWild.Client/GdalEnvironment.cs?at=defaultwithout
luck.
** **
Am I on the right track with the environment variables? Has anyone had any
luck setting these environment variables (GDAL_DATA, GDAL_DRIVER, PROJ_LIB)
in .Net code for Mapscript use? If so, can you guide me? Or, is there a
work around? I am even willing to put everything in the bin directory if
that is the only way to make things work.
** **
Thanks a ton in advance for your assistance.
** **
Dave Lowther
Coordinate Solutions, Inc
** **
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