[Mapserver-users] Question about wld/gfw file

[Lowell Filak]

If my understanding is correct - what you are trying to do is generate a
map elsewhere and save it as an image (gif file) and then serve that
"raster" layer up using mapserver.?
If that understanding is correct then the answer to "Do I need to create
a new wld/gfw file for each of my own maps?" is yes.

If all your doing is serving up a single raster layer (the map image)
then you can use just about any coordinates you would like in the wld
file because the image will not need to relate to any other data.
Keep in mind that you can't serve a scalebar with this approach as it
will be incorrect.
Example (this is a quick example so I may need corrected here): If the
image is 1000x1000 then the wld could be:
1
0
-0
-1
0
1000
and the mapfile extent would be 0 0 1000 1000

HTH

Lowell

The following message was sent by =?iso-8859-1?q?TOH=20CZ?=
<cz_toh at yahoo.com> on Thu, 18 Mar 2004 06:22:32 +0000 (GMT).

> Hi, I have a few questions about the wld/gfw files
> used in mapserver
> 1) Do I need to create a new wld/gfw file for each of
> my own maps?
> 2) How do you determine what to put into the wld/gfw
> file?
> I tried searching the archives, I could not find one
> that contained information about using GIF files
> Right now, my file shows a blank GIF image
> 
> MAP
>   IMAGETYPE      GIF
>   EXTENT         201621.496941 -294488.285333
> 1425518.020722 498254.511514
>   SIZE           400 300
>   SHAPEPATH      "C:\Program Files\Apache
> Group\Apache2\htdocs\tutorial\data"
>   IMAGECOLOR     255 255 255
> 
>   PROJECTION
>     "proj=laea"
>     "ellps=clrk66"
>     "lat_0=45"
>     "lon_0=-100"
>   #
>   # Alternatively, you can specify an EPSG code.
>   # "init=epsg:2163"
>   #
>   END
> 
>   # Start of LAYER DEFINITIONS
> ---------------------------------------------
>   LAYER # States polygon layer begins here
>     NAME         tp_genmap
>     DATA         "tp_genmap.gif"
>     STATUS       DEFAULT
>     TYPE         RASTER
> 
>     PROJECTION
>       "init=epsg:4326"
>     END
> 
>     CLASS
>       COLOR        232 232 232
>       OUTLINECOLOR 32 32 32
>     END
>   END # States polygon layer ends here
>   # End of LAYER DEFINITIONS
> -------------------------------
> 
> END # end of map file/object
> Thanks
> 
> 
> 	
> 	
> 		
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