[Geoserver-jp] CQL and DWITHIN

[Mario Basa]

Seto-san,

Thanks also for the link.

Regards,

Mario.


On Wed, Oct 13, 2010 at 11:00 PM, Toshikazu SETO (MBPro)
<gr0008sf at ed.ritsumei.ac.jp> wrote:
> Mario-san
>
> Thank you for the some informations! I try to access your Web site.
> Very interesting!
>
> DWUTHIN is here:
> http://lyceum.massgis.state.ma.us/wiki/doku.php?id=wfs:dwithin
>
> Additionaly, I mentioned WPS with Geoserver.
> Best regards.
>
>
>
> Mario Basa さんは書きました:
>>
>> Hello Seto-san,
>>
>> What I really like about DWITHIN, and CQL in general, is that it easy
>> to make complicated filters with no programming.
>>
>> My little demo of DWITHIN is here:
>>
>> http://demo2.orkney.jp/geothematics/census2005_cql.html
>>
>> it contains a lot of bugs, but it does show what DWITHIN filters can do.
>>
>> Regards,
>>
>> Mario.
>>
>>
>>
>> On Tue, Oct 12, 2010 at 10:01 PM, Toshikazu SETO (MBPro)
>> <gr0008sf at ed.ritsumei.ac.jp> wrote:
>>>
>>> Mario-san
>>>
>>> Thank you for very nice information!
>>>
>>> I hopefully try to ovarley some layers into geothematics.
>>> For example, facilities point data (cf.shp) and census polygon data.
>>>
>>> So, I think CQL and DWITHIN is very interesting.
>>> I want to try this sample.
>>>
>>> best regards.
>>>
>>> Mario Basa さんは書きました:
>>>>
>>>> Hello again.
>>>>
>>>> One of the most useful CQL filter for me now is DWITHIN, because with
>>>> just one line:
>>>>
>>>> cql_filter: dwithin(the_geom,POINT( x y ),radius,"meters")
>>>>
>>>> I was able to create a radius filter for both WFS and WMS  requests.
>>>> The radius parameter though has to be in the same units as that of the
>>>> layer, so it is best to convert the layer's projection so that the
>>>> units will be in meters.
>>>>
>>>> Anyway, with just that one line, it is easy to create an application
>>>> that can do Site Analysis and show if a site has a 1 million
>>>> population within a 10 kilometer radius (半径10km＝人口100万人以上). This is
>>>> actually one the requirements for a Cosco site:
>>>>
>>>> http://www.costco.co.jp/real.htm
>>>>
>>>> Attached are a couple of screen shots of my little application that
>>>> uses DWITHIN.
>>>>
>>>> Regards,
>>>>
>>>> Mario.
>>>>
>>>>
>>>> ------------------------------------------------------------------------
>>>>
>>>>
>>>> ------------------------------------------------------------------------
>>>>
>>>>
>>>> ------------------------------------------------------------------------
>>>>
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>>>
>>
>
>