tiff files not displaying

[Matt Garrish]

> 
> From: Matt Garrish <matthew.garrish at SYMPATICO.CA>
> Date: 2005/09/15 Thu PM 03:45:40 EST
> To: MAPSERVER-USERS at LISTS.UMN.EDU
> Subject: [UMN_MAPSERVER-USERS] tiff files not displaying
> 
> If anyone could enlighten me as to what I'm doing wrong I would really appreciate it. I'm just trying to get a tiff file to display (Windows XP, IIS 5), but all I get returned is a blank image. The mapserver configuration info is as follows:
> 
> MapServer version 4.7 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP 
> OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=FREETYPE SUPPORTS=WMS_SERVER 
> SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT 
> SUPPORTS=WCS_SERVER SUPPORTS=FASTCGI SUPPORTS=THREADS INPUT=POSTGIS 
> INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE DEBUG=MSDEBUG
> 
> My map file is set up like so:
> 
> MAP
> 
>   EXTENT -141 42 -52 83
>   UNITS DD
> 	

D'oh! My bad. I just changed the above lines to:

  EXTENT -2750500.131 -2999499.756 2749499.869 3000500.244
  UNITS METERS

And the image appeared. Is there any way to mix two types of images, (one in decimal degrees and one in metres?), or do I have to convert one or the other? If I do have to convert (bearing in mind I am complete newbie), would gdalwarp be the right tool? And can it be done when the tif file does not contain coordinate system info?

Thanks again for any help,

Matt