[Mapserver-users] raster transparent color

Mon Jan 6 16:29:51 EST 2003

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You can use OFFSITE for this. Example:

  LAYER
    NAME "raster_image"
    DATA "../data/image.tif"
    TYPE RASTER
    STATUS ON
    OFFSITE 0
  END

Pixels with a value of 0 will not be drawn, or will be drawn transparent 
depending on how you look at it.

Aaron D. Hunt wrote:

> Is there a way to make a color on a raster to be transparent? I have 
> some georef images of interpolated fields with a white fill out side 
> the field boundary. I want to overlay the interpolated fields with 
> ortho backgrounds.
>  
> Thank you for any help
>  
> Aaron D. Hunt

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You can use OFFSITE for this. Example:<br>
<br>
&nbsp; LAYER<br>
&nbsp;&nbsp;&nbsp; NAME "raster_image"<br>
&nbsp;&nbsp;&nbsp; DATA "../data/image.tif"<br>
&nbsp;&nbsp;&nbsp; TYPE RASTER<br>
&nbsp;&nbsp;&nbsp; STATUS ON<br>
&nbsp;&nbsp;&nbsp; OFFSITE 0<br>
&nbsp; END<br>
<br>
Pixels with a value of 0 will not be drawn, or will be drawn transparent
depending on how you look at it.<br>
<br>
Aaron D. Hunt wrote:<br>
<blockquote type="cite"
 cite="mid008901c2b5c9$ded5e950$1805000a at zedxinc.com">  
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  <div><font face="Arial" size="2">Thank you for any help</font></div>

  <div>&nbsp;</div>

  <div><font face="Arial" size="2">Aaron D. Hunt<br>
  </font></div>
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