[Chameleon] WMS queryByPoint

[Senaratne,Udesh [Ontario]]

Hi list,

Thanks for you reply Paul.

The idea was, if we have "layer A" consisting of Polygons, and "layer B"
consisting of Points, and the user clicks on Geo-coordinate (x,y) then
the Query returns:
1. The polygon feature in layer A that contains the geo-coordinate (x,y)
2. Return all the Points in Layer B be whose Geo-coordinate is contained
in the Polygon obtained from 1.

An example would be, if I clicked somewhere on a Province (suppose
polygon layer), I obtain all the cities (a point layer) belonging to
that province.

Udesh


-----Original Message-----
From: Paul Spencer [mailto:pspencer at dmsolutions.ca] 
Sent: Monday, December 20, 2004 3:01 PM
To: Senaratne,Udesh [Ontario]
Subject: Re: [Chameleon] WMS queryByPoint


Udesh,

unfortunately WMS doesn't work like that, you don't have any access to 
the actual underlying data.

Cheers,

Paul

Senaratne,Udesh [Ontario] wrote:
> Hello,
> 
> In class,/ MapQuery::executePointQuery($nX, $n)/ [file ...
> chameleon/htdocs/common/wrapper/map_query.php]/,/ the mapscript member

> fucntion/ getWMSFeatureInfoURL(...)/ is used to obtain results when
the 
> layer connection type is MS_WMS. 
> 
> Does anyone know if it is possible to use the php-mapscript function/
> layerObj::queryByPoint(pointObj, multiple ,buffer)/ to do the same
thing 
> for WMS connections.  Chameleon uses this method for none WMS 
> connections.  When I tried doing this for WMS connections, I got 0 
> results for all layers when there should have been more.
> 
> What I want to do eventually, is to access the shapeObj of the results
> so that I can use the php-script function : 
> s/hapeObj::contains(pointObj)/ .
> 
> Thanks
> Udesh
> 
> 
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|Paul Spencer                           pspencer at dmsolutions.ca   |
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|Applications & Software Development                              |
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