[Mapserver-users] Just call me a newbie . . . multiple Raster LAYERs question {Scanned} {Scanned}

Thu Mar 18 09:06:09 EST 2004

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Siki Zoltan wrote:

>Hi,
>
>On Wed, 17 Mar 2004, Bob Basques wrote:
>
>  
>
>>All,
>>
>>Let's say I have Six different levels of resolution of Aerial Photo's  
>>all of them having the same coverage extents.
>>
>>
>>    
>>
>
>It won't work.
>You should create six tile index and six layer and set MINSCALE and 
>MAXSCALE for them to turn the best one for a scale. You can add them to
>the same group, so you can easily turn them on and off through the group 
>name.
>  
>
I got it to work as you (and others) described with seperate layers and 
using the GROUP option.

>An other solution may be the sid format (may be the ecw to).
>As far as I know ecw is supported in the nightly built version.
>As far as I know MrSid is not supported :(
>These format can contain multi resolution image sources, that case you can 
>use the six different resolution tile as one image, that case no need for 
>tileindex.
>  
>
In my experience the MRSID option is too slow to render, I believe the 
performance is (much) better using the seperate resolutions as LAYERS.

bobb

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Siki Zoltan wrote:
<blockquote
 cite="midPine.LNX.4.44.0403180848480.20859-100000 at bme-geod.agt.bme.hu"
 type="cite">
  <pre wrap="">Hi,

On Wed, 17 Mar 2004, Bob Basques wrote:

  </pre>
  <blockquote type="cite">
    <pre wrap="">All,

Let's say I have Six different levels of resolution of Aerial Photo's  
all of them having the same coverage extents.

    </pre>
  </blockquote>
  <pre wrap=""><!---->
It won't work.
You should create six tile index and six layer and set MINSCALE and 
MAXSCALE for them to turn the best one for a scale. You can add them to
the same group, so you can easily turn them on and off through the group 
name.
  </pre>
</blockquote>
I got it to work as you (and others) described with seperate layers and
using the GROUP option.<br>
<blockquote
 cite="midPine.LNX.4.44.0403180848480.20859-100000 at bme-geod.agt.bme.hu"
 type="cite">
  <pre wrap="">An other solution may be the sid format (may be the ecw to).
As far as I know ecw is supported in the nightly built version.
As far as I know MrSid is not supported :(
These format can contain multi resolution image sources, that case you can 
use the six different resolution tile as one image, that case no need for 
tileindex.
  </pre>
</blockquote>
In my experience the MRSID option is too slow to render, I believe the
performance is (much) better using the seperate resolutions as LAYERS.<br>
<br>
bobb<br>
<br>
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