Hi Frank, I've tested your change and the speedup is really big. Thanks.
I've opened up ticket 2084 for this: http://trac.osgeo.org/mapserver/ticket/2084 Best regards, Bart -- Bart van den Eijnden OSGIS, Open Source GIS http://www.osgis.nl --------- Oorspronkelijk bericht -------- Van: Frank Warmerdam <[EMAIL PROTECTED]> Naar: [email protected] <[email protected]> Onderwerp: Re: [UMN_MAPSERVER-USERS] WMS: non square pixels performance Datum: 02/05/07 19:08 > Eijnden, Bart van den (AGI) wrote: > > Hi Frank, > > > > the data (shape file) can be downloaded from here (about 20 Mb): > > Bart, > > Whew, that is a big slow down! It seems that the projection you are using > is very expensive computationally, and it was being applied twice per > point unecessarily so that the rescaling needed for non-square pixels could > be applied. > > I have applied a change in mapproject.c to short circuit this reprojection > work that brings down the slow case to only about 50% more time than the > fast case. If you can easily test with trunk or perhaps incorporate this > change into the source you are building from that would be appreciated. > > http://trac.osgeo.org/mapserver/changeset/6075 > > If it works well for you, I'd be inclined to incorporate this fix into > MapServer 4.10.2 but I'll need a ticket in trac to reference. > > Best regards, > -- > ---------------------------------------+-------------------------------------- > I set the clouds in motion - turn up | Frank Warmerdam, [EMAIL PROTECTED] > light and sound - activate the windows | http://pobox.com/~warmerdam > and watch the world go round - Rush | President OSGeo, http://osgeo.org > >
