[postgis-users] How to select points within circle, thanks it works

[zhang zhe]

 Hello,
 
thanks it works. 
 
BR,
JoJo


Date: Tue, 19 Oct 2010 12:53:22 +0200
From: nicklas.aven at jordogskog.no
To: postgis-users at postgis.refractions.net
CC: 
Subject: Re: [postgis-users] How to select points within circle



Your syntax is a little backwards an it is better to use st_dwithin instead:
 
select gid, the_geom, floorarea from "building" as m where ST_DWithin(m.geom,'POINT(306404701,6755737)'::geometry, 200.0);

HTH
Nicklas

2010-10-19 zhang zhe wrote:

Hello,
>  
> I have one table called building.sql which contains points. I want to select building which fall within a circle. This circle is not a sql table but instead only coordinate and radius such as circle(point '(0,0)', 2.0). 
>  
> My sql query is like this 
> select gid, the_geom, floorarea from "building" as m where m.geom within(GeoFromText(circle(point '(306404701,6755737)', 200.0)));
>  
> But it gives me erro. Does anyone knows where went wrong? 
>  
> Thanks a lot
>  
> 
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