[mapserver-users] Can the PROCESSING layer attribute be set dynamically through (PHP) MapScript?

[Rahkonen Jukka (Tike)]

Hi,

It would be easier to play with PROCESSING attributes if they could be changed with runtime substitution. Thomas Bonfort has written that any favorite MapServer provider can do the addition.

http://lists.osgeo.org/pipermail/mapserver-users/2013-September/075342.html

-Jukka Rahkonen-

Jorrit Goddijn wrote:

 
> Hi Dan,
> 
> Yes I only just saw that you can load layer definitions from strings. This would be
> indeed much less  cumbersome than using mapscript. We'll have a look at this
> for our next project/.
> 
> Thanks for your input!
> Jorrit
> 
> -----Original Message-----
> From: Dan Little [mailto:theduckylittle at gmail.com]
> Sent: dinsdag 27 mei 2014 16:10
> To: Michael Schulz
> Cc: Jorrit Goddijn; mapserver-users at lists.osgeo.org
> Subject: Re: [mapserver-users] Can the PROCESSING layer attribute be set
> dynamically through (PHP) MapScript?
> 
> You might want to reconsider how your script is built.  Instead of loading up the
> Mapfile and tweaking small parameters with MapScript, consider converting
> your mapfile to a template language.  This way you can forumulate the mapfile,
> load it as a string, do the appropriate substitutions, then use PHP to serve it as
> WxS.
> 
> This usually ends up being faster, easier to maintain, and more flexible over the
> long term.
> 
> On Tue, May 27, 2014 at 6:33 AM, Michael Schulz
> <mandschulz at googlemail.com> wrote:
> > Hi Jorrit,
> >
> > maybe it's just a type in the second setprocessing line of your example:
> >
> > $current_layer->setprocessing('BANDS=1,2');  #removed second bracket
> >
> > Cheers, Michael
> >
> >
> > 2014-05-27 11:50 GMT+02:00 Jorrit Goddijn
> <Jorrit.Goddijn at meteogroup.com>:
> >>
> >> Hi all,
> >>
> >>
> >>
> >> I’m drawing layers based on GRIB data files. Each file contains
> >> several bands (datasets). I can access these datasets by setting the
> >> PROCESSING attribute on the LAYER object. As in this example:
> >>
> >>
> >>
> >> #########################
> >>
> >> LAYER
> >>
> >>       NAME "current_grid"
> >>
> >>       TYPE POINT
> >>
> >>       CONNECTIONTYPE uvraster
> >>
> >>       DATA
> >> "/var/www/mapserver/data/grib/routeguard/4nwwin99_2013110412.grb2"
> #v and
> >> u-component of current
> >>
> >>       PROCESSING "BANDS=1,2"
> >>
> >>       PROCESSING "UV_SPACING=20"
> >>
> >>       CLASS
> >>
> >>         STYLE
> >>
> >>           SYMBOL "arrow"
> >>
> >>           ANGLE [uv_angle]
> >>
> >>           SIZE [uv_length]
> >>
> >>           COLOR 255 0 0
> >>
> >>         END # style
> >>
> >>       END # class
> >>
> >>
> >>
> >>       PROJECTION
> >>
> >>           #"init=epsg:4326"
> >>
> >>           "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs +pm=-360"
> >>
> >>       END
> >>
> >> END # layer
> >>
> >> ####################
> >>
> >>
> >>
> >> This works fine. But I need to set the PROCESSING values dynamically
> >> through mapscript. If I add this code to my script (which works fine
> >> without these lines):
> >>
> >>
> >>
> >> ####################
> >>
> >>     $map = ms_newMapObj($_GET['MAP']);
> >>
> >>     $current_layer = $map->getlayerbyname('current_grid');
> >>
> >>     // both of these do not work
> >>
> >>    //$current_layer->set('processing', 'BANDS=1,2'));
> >>
> >>     //$current_layer->setprocessing('BANDS=1,2'));
> >>
> >>     $request = createRequest("");
> >>
> >>    $result = $map->owsdispatch($request);
> >>
> >> ####################
> >>
> >>
> >>
> >> I get an internal server error (500). It seems that setting any
> >> attribute via the layer->set() method causes this behavior. I’m
> >> migrating from MS 5.4, does the set method still work as expected?
> >>
> >>
> >>
> >> Thank you
> >>
> >>
> >>
> >> Jorrit Goddijn
> >>
> >> jorrit.goddijn at meteogroup.com
> >>
> >> MeteoGroup
> >>
> >>
> >>
> >>
> >> _______________________________________________
> >> mapserver-users mailing list
> >> mapserver-users at lists.osgeo.org
> >> http://lists.osgeo.org/mailman/listinfo/mapserver-users
> >
> >
> >
> >
> > --
> > -----------------------------------------------------------
> > Michael Schulz
> >
> > Bahnhofstr. 62
> > D-63477 Maintal
> >
> >
> > _______________________________________________
> > mapserver-users mailing list
> > mapserver-users at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/mapserver-users
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