Le Tuesday 07 August 2007 14:57:34 Daniel Morissette, vous avez écrit : > Jacolin Yves wrote: > > Le Tuesday 07 August 2007 14:37:59 Daniel Morissette, vous avez écrit : > >> If you are using MapServer as a WMS service and expecting the > >> transparency/opacity of a given layer to result in a 50% opaque GetMap > >> response then that won't work. > > ... > > > Is it a limitation from mapserver or from the standard itself? > > It's a bit of both. > > The WMS spec is not clear on whether it is acceptable to return > semi-transparent images. Section 7.2.3.9 of the WMS 1.1.1 spec talks > about the TRANSPARENT=TRUE/FALSE GetMap parameter but that is only to > control whether the background of the image is fully transparent or not > and does not address the possibility of producing semi-transparent > images. Everywhere else it suggests that pixels representing features > are fully opaque. > > And it may also be a MapServer limitation in the sense that we may need > to make some changes to allow MapServer to generate semi-transparent > images... but maybe not and that works already, I just haven't checked. > > Daniel
Alright, thanks Daniel. Y. -- Yves Jacolin --- http://softlibre.gloobe.org
