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<div class="moz-cite-prefix">Hi Andreas,<br>
<br>
Here's a good example:<br>
<a class="moz-txt-link-freetext" href="http://openlayers.org/dev/examples/getfeature-wfs.html">http://openlayers.org/dev/examples/getfeature-wfs.html</a><br>
<br>
The states are drawn as an image from a web map server using the
WMS protocol, in this case GeoServer. The same software also
supports WFS, which returns feature information and its geometry
as well. Clicking or drawing a box generates a WFS GetFeature
query and returns features. The states from the image come from a
WMS GetMap request.<br>
<br>
So, as you can see, features with their geometries are only
returned when needed to interact with.<br>
<br>
You should also take a look at the following example:<br>
<a class="moz-txt-link-freetext" href="http://openlayers.org">http://openlayers.org</a> /dev/examples/getfeatureinfo-control.html<br>
<br>
Click on the map, on a water body. You'll see feature
information returned to the right. This is accomplished
exclusively using WMS. The map is an image returned by a WMS
server, which makes it fast.<br>
<br>
HTH,<br>
<br>
<br>
[1] <a class="moz-txt-link-freetext" href="http://en.wikipedia.org/wiki/List_of_GIS_software">http://en.wikipedia.org/wiki/List_of_GIS_software</a> (see Web map
servers)<br>
<br>
<br>
<br>
On 12-09-27 03:41 AM, Andreas Schnieders wrote:<br>
</div>
<blockquote
cite="mid:CAHfqXiYsNB4UU0i9ngSq8_qWssGFdydd9RO0Rz-ePuYJs6qgFw@mail.gmail.com"
type="cite">
<div>Thanks again, but I'm afraid, that won't work for me.</div>
<div><br>
</div>
<div>Each 3 of that total number of features are combined to form
one "metafeature" which is selectable and modifiable. On
selection further information is displayed. I don't see, how I
would achieve that through an image of the features?!</div>
<div><br>
</div>
<div>Maybe I just don't know the technology to "render" an image
from the feature information on server side (geoserver?). Could
you provide an example documentation or something on that? So I
at least could have a deeper look in the theory.</div>
<div><br>
</div>
<div>Kind regards, </div>
<div>Andreas</div>
<div><br>
</div>
<br>
<div class="gmail_quote">
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
Message: 4<br>
Date: Wed, 26 Sep 2012 08:24:48 -0400<br>
From: Alexandre Dub? <<a moz-do-not-send="true"
href="mailto:adube@mapgears.com">adube@mapgears.com</a>><br>
To: <a moz-do-not-send="true"
href="mailto:openlayers-users@lists.osgeo.org">openlayers-users@lists.osgeo.org</a><br>
Subject: Re: [OpenLayers-Users] Fastest way to create and
frequently<br>
update ~1000 Features<br>
Message-ID: <<a moz-do-not-send="true"
href="mailto:5062F410.6040205@mapgears.com">5062F410.6040205@mapgears.com</a>><br>
Content-Type: text/plain; charset="windows-1252";
Format="flowed"<br>
<br>
Hi Andreas,<br>
<br>
What Phil meant is that you should switch to a WMS server
returning<br>
an image to display your all your features, and if you need to
query or<br>
manipulate them use WFS but only with a small number of
features at a time.<br>
<br>
HTH,<br>
<br>
Alexandre<br>
<br>
<br>
On 12-09-26 06:33 AM, Andreas Schnieders wrote:<br>
> Hi,<br>
> >> to those of you being experienced with large
numbers of features: What<br>
> >> do you consider the fastest way to create
something around 1000<br>
> >> features and update the every 5 - 60 seconds? Or
is there even an<br>
> >> "official" best practice?<br>
> >Large no. of features and KML dont go well together
in my opinion. I<br>
> >would strongly consider using WMS for image, WFS for
any query. You<br>
> >might want to see how well your application fits
WMS-T.<br>
><br>
> Thanks! But where exactly would be the benefit of
switching from KML<br>
> to GML3 for example? GML is "just" another xml-structure
OpenLayers<br>
> would have to evaluate...?<br>
> Or would you recommend switching to JSON-output for WFS?
How would you<br>
> create the features on client-side in that case?<br>
><br>
> Kind regards,<br>
> Andreas</blockquote>
</div>
<br>
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<br>
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<br>
<br>
<pre class="moz-signature" cols="72">--
Alexandre Dubé
Mapgears
<a class="moz-txt-link-abbreviated" href="http://www.mapgears.com">www.mapgears.com</a>
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