[mapserver-users] show only some point on the map
Till Adams
adams at terrestris.de
Thu Aug 28 10:53:06 EDT 2008
Steve,
thats good info, I didn't even try that till now....
although, most of the time we have a database, so we do not care :-)
thanks and happy to see you soon in Cape Town --
Till
> The IN operator works with all datasources since it's an expression.
> I've done this before and it works fine although there are probably some
> practical limits in the number of features you'd want to deal with this
> way. If you can group the IDs into one var (e.g ids) and then use an
> expression like:
>
> EXRESSION ('[myid] in '%ids')
>
> That should work...
>
> Steve
>
>
>>>> valerio vianello <valerio.vianello at yahoo.it> 08/28/08 5:16 AM >>>
>>>>
> Hi Till,
>
> maybe I forgot to tell you that my data source is a shapefile and not a
> database.
>
> so if I have good understood the only solution that I have to try is to
> use an SLD file.
>
> Regards to group the point in such a way in not possible in this case
> becouse I have a certain number of points and in each request the user
> should be able to select the point to show.
>
> br,
> Valerio.
>
> --- Gio 28/8/08, Till Adams <adams at terrestris.de> ha scritto:
> Da: Till Adams <adams at terrestris.de>
> Oggetto: Re: [mapserver-users] show only some point on the map
> A: valerio.vianello at yahoo.it
> Cc: "mapserver" <mapserver-users at lists.osgeo.org>
> Data: Giovedì 28 agosto 2008, 10:41
>
> valerio,
>
> OK, I think you may use more than one subvar, but if there are too many,
> ...
>
> And there is no way to group the points together in any attribute, which
>
> are shown together?
>
> One solution might be to generate a temporary view in a database (if the
>
> points come out of such) and then
> send the name of the view via subvar to your file.
>
> Even better, generate a string out of your selected gid's like
>
> 1,3,45,567,789,790
>
> Send this Stringvia subvar to your mapfile and use a "WHERE gid IN ('
>
> YOURSTRING ') in your SQL in the mapfile...
>
>
> Another possible solution might be...hack around and not really fine,
> but write a temporary SLD file - which only works when using mapserver
> as WMS server.
> You can let a script write a temporary-SLD file, where your filter is
> set to your ids and apply this to your getmap request
> (&SLD=path/tp/your_name.xml).
>
> To ensure, that only user A uses his filtered SLD, we normally used the
> PHP session ID or sth similar for naming the sld.
>
> Many ideas, find the best way for you...
> Regards, Till
>
>
>> Dear Till,
>>
>> Thanks for the suggestion.
>>
>> But with variable substitution I am able to specify only one parameter
>>
>
>
>> like
>>
>> EXPRESSION ([FNR]=%myid%) .
>>
>> in this case on the map will be shown only one point (if myid is
>> unique) or a group of points (if myid is shared among them)
>>
>> in my case I want show the points with myid1,myid2,myid3...
>>
>> how I should set this into the mapfile ?
>>
>> regards
>>
>> Valerio
>> --- *Gio 28/8/08, Till Adams /<adams at terrestris.de>/* ha scritto:
>>
>> Da: Till Adams <adams at terrestris.de>
>> Oggetto: Re: [mapserver-users] show only some point on the map
>> A: valerio.vianello at yahoo.it
>> Cc: "mapserver" <mapserver-users at lists.osgeo.org>
>> Data: Giovedì 28 agosto 2008, 09:35
>>
>> Dear Valerio,
>>
>> I guess what you need is this:
>> http://mapserver.gis.umn.edu/docs/reference/mapfile/variable_sub
>>
>> So add a variable substitution and insert it into your expression
>>
> in
> the
>
>> CALL section of your layer.
>>
>> Regards,
>> Till
>> > Dear list,
>> >
>> > I have this question:
>> >
>> > I have a map file in which there is a POINT layer that uses a
>> > shapefile as datasource. Is possible with mapserver to do a
>>
> request to
>
>> > show only some point on the map ?
>> >
>> > I know that i can show a group of points or only one point using
>>
>
>
>> > FILTER and CLASSITEM into the map file but my goal is a bit
>>
> different.
>
>> > In my case each poi has an ID into the shapefile, and I want
>>
> make
> a
>
>> > request to serve the follow question:
>> >
>> > Show on map the poi with ID 3,6,8.
>> >
>> > any suggetsion ?
>> >
>> > P.S I'm using CGI interface maybe is this possible to do with
>> mapscript ?
>> >
>> > thanks everybady
>> >
>> > Valerio
>> >
>> >
>> > > Poco spazio e tanto spam? Yahoo! Mail ti protegge dallo spam e
>>
> ti
> da
>
>> >
>> tanto spazio gratuito per i tuoi file e i messaggi
>> > http://mail.yahoo.it
>> >
>>
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>
>> >
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>> >
>>
>>
>> --
>> ----------------------------------------------------------
>> terrestris GmbH & Co. KG
>> Irmintrudisstrasse 17
>> 53111 Bonn
>> Germany
>>
>> Till Adams
>> Geschäftsführung
>>
>> Tel: +49 (0)228 / 962 899-52
>> Fax: +49 (0)228 / 962 899-57
>> adams at terrestris.de http://www.terrestris.de
>> Amtsgericht Bonn, HRA 6835
>> ---------------------------------------------------------
>>
>> Komplementärin:
>>
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>>
>> vertreten durch:
>> Hinrich Paulsen, Till
>> Adams
>>
>>
>>
>>
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>
>
>
--
----------------------------------------------------------
terrestris GmbH & Co. KG
Irmintrudisstrasse 17
53111 Bonn
Germany
Till Adams
Geschäftsführung
Tel: +49 (0)228 / 962 899-52
Fax: +49 (0)228 / 962 899-57
adams at terrestris.de http://www.terrestris.de
Amtsgericht Bonn, HRA 6835
---------------------------------------------------------
Komplementärin:
terrestris Verwaltungs GmbH
vertreten durch:
Hinrich Paulsen, Till Adams
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