Increase Clarity of WMS

[Kyle Mulka]

I was able to improve the quality of the image significantly when you 
zoom in by resizing and scaling the image beforehand so that mapserver 
does a very minimal amount of resampling. I decided to make it optimal 
for the second to closest zoom level. The quality is much closer to 
where I want it. Try zooming in about three zoom levels.
http://maps.kylemulka.com/floorplan-test10.php

-Kyle

Clint Johnson wrote:

> Kyle,
>
> Your error is due to the line that says
>  PROCESSING "RESAMPLE=AVERAGE"
>
> If you want a quality image then by all means do NOT use average 
> dithering.
> example of average dithering 
> http://www.visgraf.impa.br/Courses/ip00/proj/Dithering1/average_dithering.html 
>
>
> Use one of:
>
> PROCESSING "RESAMPLE=BILINEAR"
> PROCESSING "RESAMPLE=BICUBIC" # preferable
>
>
> Stay away from nearest and average.
>
> Without having to go into Digital processing 101, using nearest or 
> average will cause your image to "chunk" when it is re-sampled (ie 
> zoomed in or out); whereas, bilinear and bicublic will give it a nice 
> "anti-aliased" look as you zoom in.
>
> Cheers,
> Clint
>
>