[OpenLayers-Users] getDataExtent() only working on part of data of layer

[Andreas Hocevar]

Hi Jan,

one more thing that came to my mind: are you aware that you are
working with two layers here? From what you wrote, it seems you think
that you have one layer lgpx. But in fact you have two, you just use
the same variable for both.

You could also solve your problem with just one layer, but then you
would have to use Format.GPX::read to get the features from both urls.
You would also have to take care to style the features properly (red
from one url, green from the other).

I guess the way you chose is simpler, you just have to be aware that
you are working with two layers.

Regards,
Andreas.

On Thu, Jun 11, 2009 at 5:55 PM, Andreas Hocevar<ahocevar at opengeo.org> wrote:
> Hi Jan,
>
> On Thu, Jun 11, 2009 at 5:20 PM, Jan Martin<janmartin3 at googlemail.com> wrote:
>> Hi all,
>>
>> right now getDataExtent() only considers the data added LAST (red).
>> But I need the map to zoom in on ALL data in lgpx (green AND red).
>>
>> What's my error?
>
> you need to take into account the dataExtent of both layers:
>
> var dataExtent;
> var setExtent = function() {
>   dataExtent = dataExtent ? this.getDataExtent() :
> this.getDataExtent().extend(dataExtent);
>   map.zoomToExtent(dataExtent);
> }
> lgpx = new OpenLayers.Layer.GML
> ("green","separated/20090607172151.gpx",{
>     projection: new  OpenLayers.Projection("EPSG:4326"),
>     style: {strokeColor: "green", strokeWidth: 5, strokeOpacity: 0.8},
>     format: OpenLayers.Format.GPX,});
> lgpx.events.register("loadend", lgpx, setExtent);
> map.addLayer(lgpx);
> lgpx = new OpenLayers.Layer.GML
> ("red","separated/20090607110550.gpx",{
>    projection: new  OpenLayers.Projection("EPSG:4326"),
>     style: {strokeColor: "red", strokeWidth: 5, strokeOpacity: 0.8},
>     format: OpenLayers.Format.GPX,});
> lgpx.events.register("loadend", lgpx, setExtent);
> map.addLayer(lgpx);
>
> Regards,
> Andreas.


--
Andreas Hocevar
OpenGeo - http://opengeo.org/
Expert service straight from the developers.