[mapserver-dev] Rendering differences upon upgrade / 5.4.0-beta3 to 5.7-dev

Bart van den Eijnden bartvde at osgis.nl
Mon Aug 9 07:42:34 EDT 2010

Hi Thomas,

do you have a custom value of RESOLUTION set in your MAP file?

If so make sure you add the DEFRESOLUTION keyword to the MAP object and give it the same value as your RESOLUTION.

Best regards,

Looking for flexible support on OpenLayers or GeoExt? Please check out http://www.osgis.nl/support.html

Bart van den Eijnden
bartvde at osgis.nl

On Aug 9, 2010, at 1:39 PM, relet wrote:

> Dear all,
> We are currently in the progress to update our mapserver installation from
> v. 5.4.0-beta3 to v. 5.7-dev
> Both setups are running on an identical setup, using the exact same set of
> libraries in a sandbox shielded from the system libraries.
> However, in the newer version, the same mapfiles are rendered with
> significantly thicker lines, larger symbols and larger fonts. The
> (transparent) background colour of single map layers also changed.
> Are you aware of relevant changes in the antialiasing, transparency
> handling, or scaling of line thickness, fonts and symbols in the recent
> versions that may have caused these changes? 
> The most important question for me is to understand whether these are the
> intentional symptoms of intentional changes in the mapserver code (meaning
> that they will not be changed, and we will have to adapt our mapfiles to the
> newer versions), unintentional symptoms of intentional changes (same same, I
> guess), or unintentional artefacts that should rather be corrected in the
> code. Or, for example, if new parameters have been introduced that can
> restore the old behaviour, changes that can be remediated with a minor edit
> in the mapfile.
> I have uploaded a few example files - each is available in the versions i1
> (old version), i2 (new version) and diff, as requested from the two
> mapservers using the same WMS request.
> http://www.geonorge.no/examples_ms/
> all examples show the different background colours 
> borders-* and rivers-* show the line thickness differences 
> church-* shows the differences in symbol size and rendering, and in point
> feature rendering (the square-ish dots are other buildings)
> all2-* and text-* show the differences in text scaling. Note that some
> features (e.g. the E-labels on the west coast) disappear. Does that imply
> that a different scaling factor is actually used and some MINSCALEDENOM
> limit has been hit, or is it only a side-effect of the larger labels taking
> up more room?
> Thank you in advance for any hints, 
> Best regards,
> Thomas
> -- 
> View this message in context: http://osgeo-org.1803224.n2.nabble.com/Rendering-differences-upon-upgrade-5-4-0-beta3-to-5-7-dev-tp5388649p5388649.html
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