I blame gmail. This mail was for all
---------- Forwarded message ---------- From: Benoit Chesneau <[email protected]> Date: Mon, Aug 2, 2010 at 8:30 AM Subject: Re: geocouch: limit number of points in an area To: Volker Mische <[email protected]> On Sun, Aug 1, 2010 at 10:43 PM, Volker Mische <[email protected]> wrote: > On 01.08.2010 17:24, Benoit Chesneau wrote: >> >> On Sun, Aug 1, 2010 at 2:17 PM, Volker Mische<[email protected]> >> wrote: >>> >>> 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, >>> Volker >>> >> This solution doesn't work when you have a lot of points though. Do >> you plan to add such things to geocouch ? >> > > Clustering isn't that easy. I think some layer on top of GeoCouch > should/will be built to handle such things. It can even be in any > programming language and communicate with GeoCouch via HTTP. > > Cheers, > Volker > > > Just for the record since we discuss about it on irc, but my main point here is to have it working in a couchapp. So imo, if CouchDB could embed all the mechanic to index geodata, but also search them it would be better than accumulating external tool on top of it. - benoit
