Hi Andreas for me it seems unlogical. The CASE-WHEN-ELSE statement is returning zero for scales larger than 1000. So I don't see any reason why QGIS draws a line with an unpredictable line-width.
I do not have access at the very moment to QGIS. But what happens when you just enter 0.0 as data defined line-width? regards Stefan Von meinem iPad gesendet > Am 19.11.2013 um 11:59 schrieb "Andreas Neumann" <[email protected]>: > > Hi Stefan, > > This seems logical to me. The data-defined styling only changes a graphical > property. It does not control whether a feature is drawn or not. You could > set it to fully transparent, but this would still fetch features and draw > them (though invisible). > > If you want to suprress features above a certain level you may do that on the > layer level in the "General settings" (or something similar). > > The labels individually allow to suppress labels based on a column or > expression, but the data-defined symbology does not allow that so far. It > would be a new feature to ask for. > > Andreas > > Am 2013-11-19 07:50, schrieb Ziegler Stefan: >> Hi >> I have a question regarding data defined styling. I'm using the $scale >> parameter to define the line width: >> CASE >> WHEN $scale <= 500.0 THEN 1 >> WHEN ($scale > 500 AND $scale <= 1000) THEN 0.5 >> END >> I would expect that the line is not drawn with a scale larger than >> 1000. But it seems the line is still drawn. It even draws the line >> with an ELSE-statement: >> CASE >> WHEN $scale <= 500.0 THEN 1 >> WHEN ($scale > 500 AND $scale <= 1000) THEN 0.5 >> ELSE 0.0 >> END >> It seems that I get my expected result when I use an ELSE value near >> zero (e.g. 0.0000001). >> Is this on purpose? Or is there an error in my statement? >> regards >> Stefan >> Freundliche Grüsse >> Stefan Ziegler >> Kantonsgeometer >> Amt für Geoinformation >> Amtliche Vermessung >> Rötistrasse 4 >> 4500 Solothurn >> Telefon +41 32 627 75 96 >> Telefax +41 32 627 75 98 >> [email protected] >> http://www.so.ch >> _______________________________________________ >> Qgis-user mailing list >> [email protected] >> http://lists.osgeo.org/mailman/listinfo/qgis-user > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user _______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
