[mapserver-users] Show only one POI on the map

[valerio vianello]

Hi Tomas,

I have found a first solution to my problem.

I used the cookies to store the variable value end I update the cookie value only when the variable change. 

and then in a javascript I update the value of the post field before submit the page.

I'm searching for other solution that don't use cookies...

thanks
Valerio

--- Mar 17/6/08, valerio vianello <valerio.vianello at yahoo.it> ha scritto:
Da: valerio vianello <valerio.vianello at yahoo.it>
Oggetto: Re: [mapserver-users] Show only one POI on the map
A: "Tamas Szekeres" <szekerest at gmail.com>
Cc: "mapserver" <mapserver-users at lists.osgeo.org>
Data: Martedì 17 giugno 2008, 08:04

Hi Tomas,

My demo is on my local machine for now...but I will show you part of the map file and template file.

this is the layer in which i use the variable the map file is called "map1.map"
# Start of LAYER DEFINITIONS ---------------------------------------------
  LAYER  #show single poi

    NAME         floor_1_Show_Pois

    DATA        POIs

    STATUS       OFF

    TYPE         POINT
    CLASSITEM "country"
    FILTERITEM 'floor'
    FILTER 'f.1'    
    LABELITEM "name"

    TOLERANCE 7

    CLASS

      NAME       'single_poi'
      EXPRESSION '%ccountry%' 
      TEMPLATE '../templates/pois.html'
      STYLE

      COLOR        0 0 0
          SYMBOL '../symbols/flag_blue.gif'
      END
      LABEL

        COLOR 0 0 0

       TYPE BITMAP 
        SIZE MEDIUM
        ANTIALIAS TRUE

        POSITION LC
        FORCE TRUE

        PARTIALS FALSE

        BUFFER 4

      END # end of label
    END #CLASS  
  END #  layer Pois with label  
#end ---------------------------------------------

when I click on same point in the map using mapserver query mode a new page is loaded where there is this link to reload the same map file to show only one pois:

<a href="/cgi-bin/mapserv50?map=/var/www/map1.map&layers=floor_1 floor_1_Show_Pois&ccountry=[country]&imgext=[state]&imgxy=[center]">Show on Section </a>

the page is loaded correct but if I try for example to query to poi I have non response or if I zoom in or zoom out into the map the poi disappears.

I tried to use the field in the template
<input type="hidden" neme="ccountry" value="[ccountry]">
but the value of [ccountry is replaced only the first time with the correct value then its value become the string
 "[ccountry]"...

any suggestions ?

best regards
Valerio




--- Lun 16/6/08, Tamas Szekeres <szekerest at gmail.com> ha scritto:
Da: Tamas Szekeres <szekerest at gmail.com>
Oggetto: Re: [mapserver-users] Show only one POI on the map
A: valerio.vianello at yahoo.it
Cc: "mapserver" <mapserver-users at lists.osgeo.org>
Data: Lunedì 16 giugno 2008, 20:03

Valerio,

I don`t think if anything is preserved across the subsequent requests
in the cgi mapserver so you might have to apply the substitution on
each request.
However I`m not sure I could catch the problem exactly, do you have
mapfile/URL examples?

Best regards,

Tamas


2008/6/16 valerio vianello <valerio.vianello at yahoo.it>:
> Hi Tamas,
>
> I have a bit issue
 ...
> Do you know how lock the variable value until the next changing ?
>
> Now I am able to show only one poi in the map but if I try to query it I
> have no results as response. I have done a lot of test and I think the
> problem is on variable value. after the page is loaded the value of
> parameter
> (EXPRESSION '%ccountry%' ) in  the map file lose its past value
and so the
> mapserver cgi haven't reference to it anymore.
>
> any suggestion ?
>
> Best regards
> Valerio.
>
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