Hi Bartek, keep in mind, that OpenLayers is an Open Source Project. Many people have spend their free time to develop OpenLayers and it's up to them, how they spend their free time. But it's possible for everyone to contribute to OpenLayers. http://trac.osgeo.org/openlayers/wiki/HowToContribute Arnd _____
Von: [email protected] [mailto:[email protected]] Im Auftrag von Bartlomiej Burkot Gesendet: Freitag, 9. März 2012 08:43 Cc: [email protected] Betreff: Re: AW: [OpenLayers-Users] How to make Openlayers to request thevector data every manipulation of map Perfectly Arnd why couldn't I find this option in official apidoc? http://dev.openlayers.org/releases/OpenLayers-2.11/doc/apidocs/files/OpenLay ers/Strategy/BBOX-js.html http://dev.openlayers.org/docs/files/OpenLayers/Strategy/BBOX-js.html#OpenLa yers.Strategy.BBOX.resFactor Why is difference between this docs? Bartek maybe adding the param resFactor to the BBOX.Strategy will solve your problem. strategies: [new OpenLayers.Strategy.BBOX({ratio: 1.1, resFactor:1})], Arnd _____ Von: [email protected] [mailto:[email protected]] Im Auftrag von Bartlomiej Burkot Gesendet: Donnerstag, 8. März 2012 16:57 An: [email protected] Betreff: [OpenLayers-Users] How to make Openlayers to request the vector data every manipulation of map Hello, I think I have exactly the same problem. I have vector layer with many points-markers. I need to limit the number of fetched points from server becouse of performance. The vectorlayer use bbox strategy and protocol HTTP: weather_points_layer = new OpenLayers.Layer.Vector("Wetterpunkte", { strategies: [new OpenLayers.Strategy.BBOX({ratio: 1.1})], protocol: new OpenLayers.Protocol.HTTP({ url: "text_layer_generator/weather_points.php" .. }) }); The script: weather_points.php limits the number of points using bbox parameter and LIMIT statement in sql query. There is the working example: http://mapakrakow.pl/pogoda/test.php When I zoomin the points are not fetched from server but from browser cache. Problem is that when you zoomin to - for example Berlin - you don't see any points. There is not any request in firebug fetching the data. Running this command: weather_points_layer.refresh({force:true}); in firebug console Openlayers requests and refreshes the data from server correctly and shows points over Berlin. I tryed to change cache-control headers in weather_points.php: #header("Cache-Control: max-age=2"); // HTTP/1.1 #header("Expires: Sat, 26 Jul 1997 05:00:00 GMT"); // Date in the past #header("Pragma: Cache"); // required //header("connection: close"); //Keep-Alive timeout=2, max=100 and add the refresh strategy: strategies: [new OpenLayers.Strategy.BBOX({ratio: 1.1}), new OpenLayers.Strategy.Refresh()], but both didn't helped. I fond this article: http://stackoverflow.com/questions/2995238/how-to-refresh-reload-a-kml-layer -in-openlayers-dynamic-kml-layer But I don't need to refresh vectorlayer in constant time interval but every time when user manipulates the map. Has someone experience how to solve this problem? Thanks for your help. Bartlomiej Burkot W dniu 2012-03-07 16:56, Jan Hartmann pisze: No, it tried that. According to the documentation, the redraw function does not take a parameter. Jan On 03/07/2012 04:45 PM, [email protected] wrote: Is this working? vectorLayer.redraw(true); Jan Hartmann <mailto:[email protected]> <[email protected]>@lists.osgeo.org Envoyé par : [email protected] 2012-03-07 10:27 A [email protected] cc Objet [Polluriel potentiel] [OpenLayers-Users] force update markers layer Hi, How do I force a redraw on a markers layer? I have a regular WMS map with markers that have their lonlat-values updated from a database. I can force a redraw of the WMS layer with mergenewparams(), but that is not possible with the markers layer. That means that the when the lonlat values are updated and I move the map, the markers remain in their original positions. Only when I zoom in or out, the marker positions are updated. Can I do something about that? Jan_______________________________________________ Users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/openlayers-users _______________________________________________ Users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/openlayers-users
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