[mapserver-users] visualisation of image with overviews

[Toni Pignataro]

Thanks a lot to Andreas and Stephan! That have been the right suggestions.
The solution for me was putting the resampling algorithm to average and 
using the AGG-driver for rendering the images.

Best regards
Toni





Am 14.02.2011 12:13, schrieb Stephan Holl:
> Hello Toni,
>
> Toni Pignataro<toni.pignataro at wheregroup.com>, [20110211 - 15:51:10]
>
>> Hi list,
>>
>> I have a  nonsatisfying visualisation of an geotiff image with
>> overviews in mapserver. The different overviews look really poor
>> zooming in the map.
>>
>> What i tried until now is, resampling the original image with
>> gdal_addo (gdaladdo -r nearest , gdaladdo -r average_mp, gdaladdo -r
>> average_magphase, gdaladdo -r mode) and i also made an gdal_translate
>> (gdal_translate -of GTiff -co "TILLED=YES"), but the results did not
>> look even better.
>>
>> Any one an suggestion how to handle the orginalimage?
>
> Perhaps you can play with the different resampling algorithms.
> Good visual results can be made with the Average method, with a little
> performance hit.
>
> And of course Andreas' hints are worth!
>
> HTH
>
> 	Stephan
>
>
>
>
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