Hi
On Wed, Jan 22, 2014 at 2:47 PM, Tim Sutton <[email protected]> wrote: > Hi > > > On Wed, Jan 22, 2014 at 1:23 PM, Martin Dobias <[email protected]>wrote: > >> On Wed, Jan 22, 2014 at 4:33 PM, Tim Sutton <[email protected]> wrote: >> >> >> >> Actually the point displacement renderer already does clustering, >> >> though it lacks more options to customize how the clustered symbol >> >> would look like. >> >> >> > >> > Doesnt it do the reverse? i.e. when more than one point falls in the >> same >> > place, it shifts them aside so they are all visible. If it can be made >> to >> > produce a scaled symbol based on the number of underlying points that >> would >> > be cool.That would also be a good time to change its name to 'Custer or >> > displace' or something. >> >> I think that was what the renderer did originally, but nowadays it >> also groups points within configured distance. Unfortunately it always >> tries to draw a circle around the clustered point with original >> symbols. If we introduced few rendering options, it would be more >> useful: >> - draw just the clustered symbol for the whole group >> - scale the clustered symbol depending on the number of points inside >> >> > Yeah that should do it! > > I tested with a large point dataset (geonames ~3.5 million records). Basically enabling the point displacement renderer on that layer kills (or takes so long I killed it) QGIS. Since the essence of clustering is to speed up rendering times and reduce visual clutter, I suspect simple tweaks to the renderer would not be enough. Regards Tim > Regards > > Tim > > >> Cheers >> Martin >> > > > > -- > Tim Sutton - QGIS Project Steering Committee Member > ============================================== > Please do not email me off-list with technical > support questions. Using the lists will gain > more exposure for your issues and the knowledge > surrounding your issue will be shared with all. > > Irc: timlinux on #qgis at freenode.net > ============================================== > -- Tim Sutton - QGIS Project Steering Committee Member ============================================== Please do not email me off-list with technical support questions. Using the lists will gain more exposure for your issues and the knowledge surrounding your issue will be shared with all. Irc: timlinux on #qgis at freenode.net ==============================================
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