[OpenLayers-Users] Polygon Cluster

[Jacolin Yves]

Hello,

Le Monday 27 October 2008 17:15:24 Jerome Freyre, vous avez écrit :
> It's Jerome ;)
oupss, sorry Jerome!
> Unfortunaly not... All the feature added in a Layer that use the cluster
> strategy will be represented as a point.
Ok I undestand now :)
> If at a certain level of zoom you want to display the feature as his "real
> representation" (point, polygon, linestring), you can use the method
> deactivate().
hum, I will try this as all my polygon seems to need to be not clustered for 
the same zoom level.

> In a project, I purpose to the user to (de)activate the "clustering mode".
> If the user feel that the map is not "readable" he can (de)activate the
> mode by clicking a checkbox.
Well, why not, but it could be interesting to get something to simplify the 
polygon in a point for some zoome level, then a simplier polygon and finally 
to get the real polygon.

It could be interesting to cluster the polygon vertex as it was point.

Anyway, thanks Jerome you answered to my problem :)

Y.

> I think it is interessant to let the user choose to activate or not the
> mode!?
>
> Jacolin Yves wrote:
> > Le Monday 27 October 2008 16:42:39 Jerome Freyre, vous avez écrit :
> >> It's normal because the cluster strategy replace your features with
> >> points.
> >>
> >> The main goal for a cluster strategy is to regroup features that are
> >> close
> >> and make the map the more "readable".
> >>
> >> And with the cluster strategy you can change the radius of the clustered
> >> points like that :
> >>
> >> // Définit les styles des features
> >> var style = new OpenLayers.Style({
> >>         fillColor: "#ee9900",
> >>         fillOpacity: 0.8,
> >>         hoverFillColor: "#ee9900",
> >>         hoverFillOpacity: 0.8,
> >>         strokeColor: "#ee9900",
> >>         strokeOpacity: 0.8,
> >>         strokeWidth: 1,
> >>         strokeLinecap: "round",
> >>         strokeDashstyle: "solid",
> >>         hoverStrokeColor: "blue",
> >>         hoverStrokeOpacity: 1,
> >>         hoverStrokeWidth: 0.2,
> >>         pointRadius: "${radius}",
> >>         hoverPointRadius: 1,
> >>         hoverPointUnit: "%",
> >>         pointerEvents: "visiblePainted",
> >>         cursor: "inherit"
> >>     }, {
> >>         context: {
> >>             radius: function(feature) {
> >>                     return Math.min(feature.attributes.count, 9) + 4;
> >>             }
> >>     });
> >>
> >>     view = new OpenLayers.Layer.Vector("View", {
> >>                 //        strategies:  [fixedStrategy, clusterStrategy,
> >> lineStringclusterStrategy],
> >> 						strategies:  [fixedStrategy, clusterStrategy],
> >>                         protocol: myprotocol,
> >>                         styleMap: new OpenLayers.StyleMap({
> >>                             "default": style,
> >>                             "select": {
> >>                             fillColor: "#8aeeef",
> >>                             strokeColor: "#32a8a9"
> >>                         }
> >>                     })
> >>                 });
> >>
> >>
> >> Hope it will help you ;)
> >
> > Hi Jeremy,
> >
> > Unfortunately not! The polygons are never shown even if I decrease the
> > distance to 1 or 2px. I expected to see polygone at some zoom level, even
> > when I am supposed to see them.
> >
> > I may be wrong but even the cluster strategy is to regroup features that
> > are
> > close, I suppose to see polygons when they are quiet far away. Isn't it?
> >
> > One of the polygon in the link I gave in my first email is quiet big but
> > never
> > shown (the northest point, surrounding the 9).
> >
> > Thanks,
> >
> > Y.
> > --
> > Yves Jacolin
> > ---
> > http://softlibre.gloobe.org
> > _______________________________________________
> > Users mailing list
> > Users at openlayers.org
> > http://openlayers.org/mailman/listinfo/users



-- 
Yves Jacolin
---
http://softlibre.gloobe.org