Re: [udig-users] Spatial relationships

[Jody Garnett <jody.garnett@xxxxxxxxx>]

Hi Dubravka you should be okay with the example you provided ... the 
ATTR1 will need to be the geometry attribute for the data you are 
working with. The table view does not show geometry attributes it is 
true; to figure out the name...
- open up the default feature editor
- click on properties for the layer (or catalog entry) and look at the 
description of the feature type

What we cannot do at this time is a "join" between two layers...

When we get a working example sorted out we can add it to this page: 
http://udig.refractions.net/confluence/display/EN/Selection+using+CQL

Note if you are using shapefiles the attribute is often called THE_GEOM 
... giving us DWITH( THE_GEOM, POINT(135.12,48.26), 0.1, km )

I am not sure if it actually pays attention to the km part ... we will 
have to check.
Jody

Dubravka Boskovic wrote:
> Hi,
>
> How can I perform query such as: which objects are within specified 
> distance (e.g. 10km) from a certain point? I tried CQL expression in 
> Table view in the form of DWITHIN(ATTR1, POINT(X Y), Z, kilometers), 
> but the geometry attribute of the object does not exist in Table view, 
> so the query returns nothing. Similar thing happened with other 
> operators. Is it possible to perform spatial query to select objects 
> from the table that are in some spatial relationship with a given object?
>
>  
>
> Dubravka
>  
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