[mapserver-users] Mapserver WMS under IIS 7 x64 serving up blank images

[Daniel Morissette]

Daniel Walton wrote:
> Thanks to all who've been helping me along. I'm getting close to having 
> x64 working now. I've worked through a slew of issues over the weekend, 
> most related to permissions. My latest issue is that mapserv.exe, when 
> invoked via IIS 7's FastCGI (classic mode) module, is returning blank 
> images.  GetCapabilities is working fine, and the GetMap images are the
> right size and format, but they're blank. Here's my setup: I downloaded 
> and installed the x64 binaries (from Tamas, thanks!) into a single 
> directory (C :\mapserver\).


Why do you think the problems are related to IIS7/x64? Have you verified 
that the same mapfile produces valid maps under MS4W or another server 
environment?

> 
>   LAYER
>     DATA 
> "C:\rawimages\A091207074551_output\A091207074551_0_config_PROCESS_RESULTS\BASINCOMPLEX_ftp.coloradoskye.com_2008_CA_Siege_080627_1200Local_SPOT_NIR_OUT.PNG"
>     EXTENT 36.0992948502284 -121.822480778145 36.3421121497716 
> -121.520865221855


Your DATA statement points to a PNG file. PNGs do not carry any 
georeferencing information by default, and the EXTENT line is not a 
replacement for missing image referencing info. Did you create a world 
file (.wld) for your PNG to specify the geographical extents of the 
image? That could very well explain the blank map.

See: http://mapserver.org/input/raster.html#georeference-with-world-files

Daniel
-- 
Daniel Morissette
http://www.mapgears.com/