[mapserver-users] Layer Object Parameter Substitution fromURLusing GIS
Steve Lime
Steve.Lime at dnr.state.mn.us
Tue Apr 7 06:52:10 PDT 2009
Hi Heiko: Two things:
1) There's an error in your URL. The syntax should be something like:
map.layer[psc]=FILTER+'orbitnr=6758'
but you'd need to escape the ' and = characters in the URL.
2) Setting extra vars in OpenLayers is easy. Something like this would
work:
myLayer = new OpenLayers.Layer.MapServer(
'stuff',
'http://some.site.com/cgi-bin/mapserv?map=/some/mapfile.map',
{ layers:'stuff', map_transparent: 'true',
somevar: 'somevalue',
},
{ ratio:1, singleTile:true, transitionEffect:'resize',
isBaseLayer:false }
);
You can then modify the content of the 'somevar' variable. With code
like:
myLayer.params.somevar = 'somenewvalue';
This will tag somevar=somenewvalue onto the URL passed to MapServer.
Steve
>>> Heiko Schröter <schroete at iup.physik.uni-bremen.de> 04/07/09 5:26 AM
>>>
On Montag, 6. April 2009 19:57:19 you wrote:
Hello,
the error seems to remain in mapserver 5.4:
/usr/lib/cgi-bin/mapserv -v
MapServer version 5.4.0-beta4 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG
OUTPUT=WBMP
OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=FREETYPE SUPPORTS=ICONV
SUPPORTS=WMS_SERVER
INPUT=TIFF INPUT=EPPL7 INPUT=JPEG INPUT=POSTGIS INPUT=SHAPEFILE
http://localhost/cgi-bin/mapserv?
MAP=/home/schroete/sciadaten/MapServer/country98/heiko1.map&
LAYERS=karte,grid,psc&SERVICE=WMS&VERSION=1.1.1&
REQUEST=GetMap&STYLES=&
FORMAT=image/png&SRS=epsg:4326&BBOX=-180,-90,180,90&
WIDTH=600&HEIGHT=300&
map.layer[psc].filter='orbitnr=6758'
loadLayer(): Unknown identifier. Parsing error near (orbitnr=6758):(line
1)
Mapfile as below. The map is ok without the 'map.layer[]...' stuff.
Does a kind soul knows howto do the runtime substitution from within
OpenLayer
(i know it is not the 100% correct list, but maybe someone has hit this
before).
Regards
Heiko
> You'll need to use 5.4 to get this functionality. That version add
> support to allow you to define
> validation strings to lock down what values can be passed for the
> variable. Another solution is
> to consider using runtime substitution to do something similar. That
> works well if the SQL is
> pretty much fixed:
>
> FILTER 'wert=%myval%'
>
> It's also easier to secure.
>
> Steve
>
> >>> On 4/6/2009 at 4:01 AM, in message
>
> <200904061101.54781.schroete at iup.physik.uni-bremen.de>, Heiko Schröter
>
> <schroete at iup.physik.uni-bremen.de> wrote:
> > Hello,
> >
> > when passing a 'FILTER' parameter to be changed with the URL to use
>
> GIS
>
> > requests, mapserv(5.0.3) fails with:
> > loadLayer(): Unknown identifier. Parsing error near (FILTER):(line
>
> 1)
>
> > The call is:
> >
> >
http://localhost/cgi-bin/mapserv?MAP=/MapServer/country98/heiko1.map&
> >
> > LAYERS=karte,grid,psc&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&
> > STYLES=&EXCEPTIONS=application/vnd.ogc.se_inimage&
> > FORMAT=image/png&
> > SRS=epsg:4326&BBOX=-180,7.91,-82.08,105.83&
> > WIDTH=256&HEIGHT=256&
> > MAP.LAYER[psc].FILTER='wert=0'
> > (Linebreaks included for readability)
> >
> > When omitting this part: " MAP.LAYER[psc].FILTER='wert=0' " the
map
>
> is
>
> > generated fine (without the proper GIS data of course).
> >
> > I did read several comments in the archive and the net about this
>
> issue but
>
> > haven't found a solution to this problem.
> > What do i miss here ?
> >
> > Thanks and Regards
> > Heiko
> >
> >
> > The Mapfile:
> > MAP
> > NAME WELT
> > DEBUG ON
> > STATUS ON
> > #SIZE 647 320
> > SIZE 800 400
> > IMAGETYPE PNG24
> > IMAGECOLOR 240 240 240
> > SHAPEPATH "data"
> > EXTENT -180 -90 180 90
> > UNITS DD
> > WEB
> > IMAGEPATH "images"
> > IMAGEURL "images"
> > MINSCALE 50000
> > MAXSCALE 400000000
> > METADATA
> > "wms_title" "Example WMS Server"
> > "wms_onlineresource"
>
> "http://localhost/cgi-bin/mapserv?map=heiko.map&"
>
> > "wms_srs" "epsg:4326 epsg:32661 epsg:32761"
> > END
> > END
> > SYMBOL
> > NAME 'circle'
> > TYPE ELLIPSE
> > POINTS 1 1 END
> > FILLED TRUE
> > END
> > SYMBOL
> > NAME 'star'
> > TYPE VECTOR
> > FILLED TRUE
> > POINTS
> > 0 .375
> > .35 .375
> > .5 0
> > .65 .375
> > 1 .375
> > .75 .625
> > .875 1
> > .5 .75
> > .125 1
> > .25 .625
> > END
> > END
> > PROJECTION
> > "init=epsg:4326"
> > END
> > LAYER
> > NAME "karte"
> > TYPE POLYGON
> > STATUS ON
> > OPACITY 50
> > DATA "cntry98"
> > METADATA
> > "wms_title" "karte layer"
> > "DESCRIPTION" "Grid"
> > END
> > PROJECTION
> > "init=epsg:4326"
> > END
> > CLASS
> > NAME "karte_color"
> > OUTLINECOLOR 60 60 60
> > COLOR 100 100 100
> > SYMBOL 0
> > END
> > END
> > LAYER
> > NAME "grid"
> > OPACITY 60
> > METADATA
> > "wms_title" "grid layer"
> > "DESCRIPTION" "Grid"
> > END
> > TYPE LINE
> > STATUS ON
> > PROJECTION
> > "init=epsg:4326"
> > END
> > CLASS
> > NAME "Graticule"
> > COLOR 0 0 0
> > # Labels comented out for readabilty in the moment
> > # LABEL
> > # COLOR 0 0 0
> > # #FONT "fritqat"
> > # #TYPE truetype
> > # MINDISTANCE 1000
> > # SIZE SMALL
> > # POSITION LR
> > # PARTIALS FALSE
> > # BUFFER 5
> > # OUTLINECOLOR 200 200 200
> > # END
> > END
> > GRID
> > LABELFORMAT "DD"
> > # LABELFORMAT '%g°' # dec degrees with symbol
> > # MINARCS 1
> > MAXARCS 1
> > MININTERVAL 30
> > MAXINTERVAL 60
> > # MINSUBDIVIDE 100
> > MAXSUBDIVIDE 300
> > # LABELFORMAT ’%7.0f m’ # nice if a projected SRS
>
> used
>
> > # MININTERVAL 20000
> > # MAXSUBDIVIDE 2
> > END
> > END # Layer
> >
> > LAYER
> > NAME "psc"
> > CONNECTIONTYPE POSTGIS
> > OPACITY 80
> > STATUS ON
> > METADATA
> > "wms_title" "psc layer"
> > END
> > PROJECTION
> > "init=epsg:4326"
> > END
> > CONNECTION "user=fum password=xyz dbname=foo
>
> host=localhost"
>
> > DATA "geocenter from scia_psc"
> > FILTER "wert=1"
> > TYPE POINT
> > CLASS
> > COLOR 250 10 10
> > SYMBOL "circle"
> > SIZE 7
> > END
> > END
> > LAYER
> > CONNECTIONTYPE POSTGIS
> > NAME "nlc"
> > OPACITY 80
> > STATUS ON
> > METADATA
> > "wms_title" "nlc layer"
> > END
> > PROJECTION
> > "init=epsg:4326"
> > END
> > CONNECTION "user=fum password=xyz dbname=foo
>
> host=localhost"
>
> > DATA "geocenter from scia_nlc"
> > FILTER "wert=1"
> > TYPE POINT
> > CLASS
> > COLOR 10 250 10
> > SYMBOL "star"
> > SIZE 7
> > END
> > END
> > LAYER
> > CONNECTIONTYPE POSTGIS
> > NAME "stro3"
> > OPACITY 80
> > STATUS ON
> > METADATA
> > "wms_title" "stro3 layer"
> > END
> > PROJECTION
> > "init=epsg:4326"
> > END
> > CONNECTION "user=fum password=xyz dbname=foo
>
> host=localhost"
>
> > DATA "geocenter from scia_stro3"
> > FILTER "wert=1"
> > TYPE POINT
> > CLASS
> > COLOR 10 10 250
> > SYMBOL "circle"
> > SIZE 7
> > END
> > END
> > END # Ende Map
> >
> > _______________________________________________
> > mapserver-users mailing list
> > mapserver-users at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/mapserver-users
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