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Date: Sun, 1 Aug 2010 17:24:53 +0200
Message-ID: <AANLkTi=cmsNPW3X8Ak6b268BypLzmwFQ5YouSv=g1ntc@mail.gmail.com>
Subject: Re: geocouch: limit number of points in an area
From: Benoit Chesneau <bchesneau@gmail.com>
To: Volker Mische <volker.mische@gmail.com>
Cc: user@couchdb.apache.org
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On Sun, Aug 1, 2010 at 2:17 PM, Volker Mische <volker.mische@gmail.com> wro=
te:
> On 01.08.2010 10:53, Benoit Chesneau wrote:
>>
>> I'm looking for a way to limit number of points retrieved for an area
>> depending on its size. Ie When playing with the zoom on the map I want
>> to be able to only display and retrieved only main points instead of
>> all the points in this area. Is there a simple way to do that actually
>> ?
>>
>> - benoit
>
> Hi Benoit,
>
> there a two ways. Either introducing a "limit" parameter, but that's
> probably not what you want. It would limit to a arbitrary selection (not =
the
> "main points" as you'd like to have it).
> You probably want clusters. My suggestion is to do it on the client side
> with OpenLayers' cluster strategy [1][2].
>
> [1] http://openlayers.org/dev/examples/strategy-cluster.html
> [2] http://openlayers.org/dev/examples/strategy-cluster-threshold.html
>
> Cheers,
> =A0Volker
>
This solution doesn't work when you have a lot of points though. Do
you plan to add such things to geocouch ?

- benoit