On Thu, Jun 12, 2008 at 02:36:56PM +0200, François Van Der Biest wrote: > 2008/6/12, G. Allegri <[EMAIL PROTECTED]>: > > > > Hello list. > > I need to call a wfs to retrieve a multipolygon vector layer. As it's > > quite huge (about 15000 vertices), I'd like to call it once (full > > extent) and then "copy" it in a vector object to avoid calling wfs > > when zooming and panning. > > > Just one question : will browsers be able to handle such an amount of data ? > I'm interested in some feedback on this.
Depending on the browser, 'sort of'. FF3 and Safari3 should handle this reasonably well. FF2 will work *okay* for display, but dragging the map will be slow: as you are more zoomed in on a large shape (less vertices in view) the rendering gets quicker. If you don't do map dragging, it's not noticably slow to do most of these things. For an example of a pretty complex vector map, you can check out http://crschmidt.net/mapping/choropleth.html -- I don't know the exact number of vertices, but 'large' is not an understatement :) I expect that parsing an XML document that large may prove problematic: anything larger than 500k is somewhat 'danger, danger', in my mind. If it were 7500 features of two vertices, it would be much slower than if it were 1 feature with 15000 vertices. In any case, in IE, you wouldn't even bother trying at this size. Regards, -- Christopher Schmidt MetaCarta _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
