[mapserver-users] visualisation of image with overviews

[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

-- 
Stephan Holl <stephan.holl at intevation.de> | Tel.: +49 (0)541-33 508 3663
Intevation GmbH, Neuer Graben 17, 49074 OS  |  AG Osnabrück - HR B 18998
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