[mapserver-users] Blank image result after the call http://localhost/mapserver/mapserv.exe?map=ecw.map&mode=map

[Jeff McKenna]

Kiks wrote:
> Hi, I'm new to Mapserver, and I'm next to view my first raster image in the
> browser, but I still have some problems: 
> 
> My MapServer runs under IIS: I've installed the tool version (FWTools2.4.6)
> and it seems to be ok. 
> 
>>From the browser I try this, but the response is a blank page. 
> http://localhost/mapserver/mapserv.exe?map=ecw.map&mode=map
> 
> This is the content of my mapfile (ecw.map): 
> 
> MAP 
>    NAME Ortofoto 
>    STATUS ON 
>    SIZE 602 589 
>    EXTENT   1546119.5 4943633.5  1552879.5 4950247.5 
>    UNITS METERS 
>    OUTPUTFORMAT 
>           NAME jpeg 
>           DRIVER "GD/JPEG" 
>           MIMETYPE "image/jpeg" 
>           IMAGEMODE RGB 
>           EXTENSION "jpg" 
>    END	
>    CONFIG "PROJ_LIB" "C:\Programmi\FWTools2.4.6\proj_lib" 
>    PROJECTION 
>            "init=epsg:3003" 
>    END 
>    LAYER 
>         NAME "ecw" 
>         TYPE RASTER 
>         STATUS ON 
>         TRANSFORM FALSE 
>         DATA "c:\tematismi\197120.ecw" 
>         EXTENT   1546119.5 4943633.5  1552879.5 4950247.5 
>         PROJECTION 
>           "init=epsg:3003" 
>         END 
>    END # Layer 
> END # Map File 
> 
> 
> if I ask for capabilities 
> 
> http://localhost/mapserver/mapserv.exe?map=ecw.map&SERVICE=WMS&REQUEST=GetCapabilities
> 
> the response is this: 
> 
> WMS Ortofoto 2048 2048 text/xml image/jpeg image/gif image/png image/png;
> mode=24bit image/vnd.wap.wbmp image/tiff image/svg+xml text/plain
> application/vnd.ogc.gml text/xml image/jpeg image/gif image/png image/png;
> mode=24bit image/vnd.wap.wbmp text/xml XML INIMAGE BLANK Ortofoto Ortofoto
> Ortofoto EPSG:3003 9.58154 9.66746 44.6433 44.7033 ecw ecw EPSG:3003 9.58154
> 9.66746 44.6433 44.7033 
> 
> The problem is that I don't know how to debug and understand where I'm
> wrong. 
> The extents of the ecw file is correct, I don't know about the projection,
> but I think there is non reason to make conversion of any type. 

Hello Kiks,

Welcome to the MapServer community :)

You should always start by using the shp2img commandline utility that 
comes with MapServer, to make sure that a map image is produced. 
http://www.mapserver.org/utilities/shp2img.html You can use the second 
or third examples to get some more information.

Also, if you have only one layer you can remove all projection objects.

If you are worried that your problem is that one data file, try another 
simple test with a shapefile and see if you can create a map image with 
shp2img.

Hope this helps a little.

-jeff



-- 
Jeff McKenna
MapServer Consulting and Training Services
http://www.gatewaygeomatics.com/