class expression problem

[Tomasz Wlazłowski]

Hello after weekend!

It's ok. I'm really happy that I have opportunity to talk with You.
Zooming in, zooming out and recenter are basic functions that work in
main app. I know that, and of course there is no need use a query/nquery
mode.
Exactly I just need to know how to pass to mapserver DB code (in my case
from [STREET] column ) and its extends (also passed from DB).

<input type="hidden" name="layer" value="Qroads">
<input type="hidden" name="map_Qroads_class_expression value = "[STREET]">
<SELECT value="1" NAME="map_Qroads_class_expression"
onchange="javascript:Doit();" <javascript:Doit();>>
<OPTION value="none"> select street </OPTION>
<OPTION value="none">---------------- </OPTION>
<OPTION value="abc">street_A</OPTION>
<OPTION value="cde">street_B</OPTION>
<OPTION value="efg">street_C</OPTION>

As You can see I have a layer named "Qroads" and so far I know how to
pass to app ID value from [STREET] COLUMN (what gives me only one object
visible in my map e.g. street_A) . Next step that I need to do is pass
its extends to obtain zoomed map to selected object.
If you have any ideas, please share with me.

Tomasz Wlazlowski

wlazlowski at igpik.waw.pl


Javier Castillejo Montes wrote:

> Sorry but maibe I didn't understnad you.
>
> Just for my own knowledge...
>
> what you want is to show (and zoom) an object selected on a, for
> example, select object, don't you?
>
> " if I want to receive map with zoomed object I can use a query/nquery
> mode." Do you mean, you need to query/nquery a map to have a zoom???
> As far as I know(I have an app that zoom with out queryt/nquery,
> further more in my app I selected a polygon - from a select object-
> and I obtain the polygonon centered and zoomed, I passed to mapserver
> its DB code and its extends) it is not necessary
>
>
> Did I understand you needs?
>
> Javier
>
>
> -----Mensaje original-----
> De: Tomasz Wlaz?owski [mailto:wlazlowski at igpik.waw.pl]
> Enviado el: viernes, 27 de agosto de 2004 14:20
> Para: Javier Castillejo Montes; MAPSERVER-USERS at LISTS.UMN.EDU
> Asunto: class expression problem
>
>
> Thank you for your prompt answer.
> On this link that you gave me I can?t find any thing that could help me
> with my problem...
> I expect that I will have to use some syntax with [imgx] and [imgy] or
> with [shpmid] but I don?t know how?
> The point is that I want to zoom to selected object (from my select
> menu) in main map window. I know that if I want to receive map with
> zoomed object I can use a query/nquery mode.
> I?m looking the way how to get attribute (from attribute table/ from
> *shape column) that refers to shape of every object.
>
> Tomasz Wlazlowski
>
> Insitute of Spatial Management and Housing
> wlazlowski at igpik.waw.pl
>
>
>
>