[OpenLayers-Dev] Re: Dev Digest, Vol 51, Issue 24
hariom singh
hariom.cs1 at gmail.com
Wed Dec 22 11:44:34 EST 2010
hi list,
i have customized extended layer switcher.please somebody help me to develop
layer group tree structure in the extended layer switcher.your help would
be highly appreciated.
thanx
On Tue, Dec 21, 2010 at 10:11 PM, <openlayers-dev-request at lists.osgeo.org>wrote:
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> Today's Topics:
>
> 1. WFS layer and filter ? only partly solved (SWEYKAM at telefonica.net)
> 2. Re: google maps (XinGang Li)
> 3. Re: OpenLayers for Mobile devices (Bob Basques)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 21 Dec 2010 10:39:19 +0100 (CET)
> From: "SWEYKAM at telefonica.net" <SWEYKAM at telefonica.net>
> Subject: [OpenLayers-Dev] WFS layer and filter ? only partly solved
> To: openlayers-dev at lists.osgeo.org
> Message-ID: <22198828.1193881292924359239.JavaMail.root at wm1>
> Content-Type: text/plain; charset="utf-8"
>
> I finally found out that geometryName and filter property have to be e x a
> c t l y this way:
> geometryName: 'mne:posicionEspacial/mne:PosicionEspacial/mne:geometria',
> property: 'mne:nombreEntidad/mne:NombreEntidad/mne:nombre',
>
> But there is still no way to read the feature.attributes.
> The higher level namespaces ‘nombreEntidad’, ‘tipoEntidad’ etc. are there,
> but null. The information I actually want sits one level lower (‘nombre’,
> ‘tipo’ etc.).
>
> Any idea how I can drill down to the information?
>
> My gazetteer layer now:
>
> var myFilter = new OpenLayers.Filter.Comparison({
> type: "~",
> property: 'mne:nombreEntidad/mne:NombreEntidad/mne:nombre',
> value: "Madrid"
> });
>
> var myLayer = new OpenLayers.Layer.Vector( "my title", {
> strategies: [new OpenLayers.Strategy.BBOX({ ratio:1, resFactor:1 })],
> protocol: new OpenLayers.Protocol.WFS({
> url: "http://www.idee.es/IDEE-WFS-Nomenclator-NGC/services?",
> featureType: 'Entidad',
> featurePrefix: 'mne',
> featureNS : "http://www.idee.es/mne",
> geometryName:
> 'mne:posicionEspacial/mne:PosicionEspacial/mne:geometria',
> readFormat: new OpenLayers.Format.GML(),
> srsName: "EPSG:4230",
> version: '1.1.0',
> extractAttributes: true
> }),
> projection: new OpenLayers.Projection("EPSG:4230"),
> filter: myFilter
> });
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> ------------------------------
>
> Message: 2
> Date: Tue, 21 Dec 2010 22:27:17 +0800
> From: XinGang Li <slinavlee at gmail.com>
> Subject: Re: [OpenLayers-Dev] google maps
> To: Kot Forge <kot.forge at mail.ru>
> Cc: openlayers-dev at lists.osgeo.org
> Message-ID:
> <AANLkTi=gePEaOng4C+OvYQP_A9K-a_Oy+kVcUkoq90V=@mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Only limited by http://code.google.com/apis/maps/terms.html
>
> Li XinGang
> EMail: slinavlee at gmail.com
> Blog: avlee.cnblogs.com
> Site: www.mapboost.org
>
>
> On Mon, Dec 20, 2010 at 9:22 PM, Kot Forge <kot.forge at mail.ru> wrote:
>
> > Use Google Maps API 3.0:
> >
> > <script src="http://maps.google.com/maps/api/js?sensor=false"></script>
> >
> > var gmap = new OpenLayers.Layer.Google(
> > "Google Streets",
> > {numZoomLevels: 20, sphericalMercator: true}
> > );
> >
> >
> > On Mon, 20 Dec 2010 13:28:24 +0100
> > Iván Sánchez Ortega <ivan at sanchezortega.es> wrote:
> >
> > > On Monday 20 December 2010 12:23:03 Mohammed Rashad wrote:
> > > > Hi,
> > > > How to load a google map without including API key like "<srcipt
> > > > src=....".
> > >
> > > Not possible.
> > >
> > > --
> > > ----------------------------------
> > > Iván Sánchez Ortega <ivan at sanchezortega.es> <ivan at geonerd.org>
> > >
> > > El ridículo es el miedo a la libertad.
> > > --
> > > Ciudad K
> > _______________________________________________
> > Dev mailing list
> > Dev at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/openlayers-dev
> >
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> ------------------------------
>
> Message: 3
> Date: Tue, 21 Dec 2010 10:40:44 -0600
> From: "Bob Basques" <Bob.Basques at ci.stpaul.mn.us>
> Subject: Re: [OpenLayers-Dev] OpenLayers for Mobile devices
> To: "Benoit Quartier" <benoit.quartier at camptocamp.com>, "Jimmy
> Duchesne" <JDuchesne at korem.com>
> Cc: "openlayers-dev at lists.osgeo.org" <openlayers-dev at lists.osgeo.org>
> Message-ID: <4D10842C020000A8000246E3 at heckle>
> Content-Type: text/plain; charset="utf-8"
>
>
> Benoit,
>
> I couldn't get the zooming to work at all on the N900. But I don't
> count that as a fault.
>
> I understand the complexities here, especially with regard to the
> multi-touch aspects vs single touch enabled devices. I think that in
> the near term the gesture aspects are going to NEED to be targeted at
> vendor specifics in order to take full advantage of each of them.
> Hopefully this will flesh out to a standard from the best available,
> but, in the near term, I'm interested in seeing a process that works for
> single touch (Could be all phone/mobile devices??) as a foundational
> chunk of coding. Hopefully this approach would get as many functional
> mobile devices accounted for as possible. Then it makes sense to attack
> the vendor specific (extra) capabilities. It seems to be easier to
> design for the masses where possible (from my experience), and then to
> enhance for the specialties, don't you think?
>
> I think there are options available for addressing these ideas, if
> anyone else is interested.
>
> bobb
>
>
>
> >>> Benoit Quartier <benoit.quartier at camptocamp.com> wrote:
>
>
> Hello Jimmy,
>
> Thank you for your feedback.
>
> In the current demonstration, zooming is done by double taping while
> zooming out is done by a single two fingers tap... on iPhone (and likely
> iPad).
>
> Gestures are very interesting and we also did some work in this
> direction. However, the issue we have with gestures is that they are
> very vendor (read Apple) specific. Current Android phone cannot detect
> two fingers event in the browser (see (and vote!)
> http://code.google.com/p/android/issues/detail?id=11909 ). The primary
> targets of our current work are iOS _and_ Android mobile phones (@Bob:
> we didn't even test it on Nokia device, so we are happy to hear that it
> works). Of course, we would like it to run on as many devices as
> possible. This is why we didn't focus on Apple specific gesture for the
> moment. One of the goal was to answer those questions you had in your
> last e-mail about OpenLayers architecture and its ability to be used on
> mobile devices.
>
> The demo shows the working part of our job. We publish it mainly to
> (re-)start the discussion about mobile OpenLayers development. Hence we
> are happy to see interest from others!
>
> Things are moving on and we will definitely continue working on this
> topic next year. Let's see how we could collaborate.
>
> Benoît
>
>
> On Mon, Dec 20, 2010 at 9:18 PM, Duchesne, Jimmy <JDuchesne at korem.com>
> wrote:
>
>
>
> Thanks for your interesting answer Benoit.
>
> We really appreciate you posting a demo of you work.
>
> Here's what I have to say about it though. First off, your panning
> behaviour is really good, as good as it can get actually.
>
> But what about gesture zoom in, out and gesture panning (panning while
> two fingers touch the screen)?
> Those are the truly difficult features to implement, especially when
> your users are experienced with native apps, and they expect to be
> allowed to pan/zoom non-stop without any glitch.
>
> I'll give you a few more information about our work so far.
>
> - First of all, we developed this project for a specific client, who
> only required an iPAD version.
> That being said, we'll definitely adapt for other platforms in the
> future, otherwise, we wouldn't
> have done it with Web technologies.
> - We have more than one layer overlaid above the base layer.
> - By the way, that allowed us to discover a huge memory leak in Safari
> iPAD. Basically, it looks like it never flushes loaded images.
> The consequence is that if the user zooms in and out really often for 5
> to 10 minutes, Safari will crash, or tiles will stop loading.
>
> Finally, on our side, we'll definitely push our implementation to the
> limit until we have something reusable that we can use in all our
> projects.
>
> We may publish a demo of our work soon, even though our implementation
> is far from complete.
>
> Thanks.
>
> _____________________________
> Jimmy Duchesne
> Programmeur Analyste
> jduchesne at korem.com
>
> KOREM inc.
> www.korem.com
> _________________
> ____________
>
> 680, boul. Charest Est, bureau 120
> Québec, QC G1K 3J4 Canada
> Tél. : (418) 647-1555
> Téléc. : (418) 647-1666
> Sans frais : 1 888 440-1MAP
>
>
> From: Benoit Quartier [mailto:benoit.quartier at camptocamp.com]
> Sent: December 20, 2010 11:18 AM
> To: Duchesne, Jimmy; openlayers-dev at lists.osgeo.org
> Subject: Re: [OpenLayers-Dev] OpenLayers for Mobile devices
>
>
>
> Hello,
>
> At Camptocamp, we are also working on an adaptation of OpenLayers for
> the mobile devices (phone and table, under iOS or Android for the
> moment). You can check
> http://www.camptocamp.com/fr/blog/2010/12/mobile-web-gis/ for more
> information (and a demonstration) about our work in this field.
>
> >From this point, we are discussing internally how we can move on with
> this development. If other people are showing an interest, it may be a
> good time to start talking together about how we can get an efficient
> OpenLayers mobile.
>
> By the way, have you a demo available? Are you specifically targeting
> Apple devices?
>
> Regards,
> Benoît
> On Mon, Dec 20, 2010 at 4:29 PM, Duchesne, Jimmy <JDuchesne at korem.com>
> wrote:
> Hi to everyone,
> (If you think that I should address this email to someone in
> particular, or another mailing list, I'd be glad to know)
>
> For over a year now, my team and I have been using OpenLayers
> thoroughly. We used it as much for internal projects as we did for our
> clients' projects.
> Overall, we're pretty much satisfied with what you guys created. It's
> an extensive framework that dramatically improves the speed at which we
> can develop our applications.
>
> That being said, for some months now, a new need has been brought to us
> by both our clients and our users. We need a framework for the different
> mobile platforms.
>
> So far, we've seen some patches posted on the OpenLayers' Issue tracker
> that added limited support for the new events that come with mobile
> devices: touches and gestures.
> Those patches were obviously just a start. They did show us that it was
> possible to use those new browser events, but as they were, they weren't
> much use.
>
> Actually, we could have used them, but when you compared the behaviour
> they had with the one mobile device's users are used to, Google Maps App
> or http://maps.google.com,
> it wasn't going to satisfy our clients.
>
> >From that perspective, our goal was this one: To achieve map behaviour
> comparable to what users get with Google Maps App on iPAD, but with
> OpenLayers as the base framework,
> and Google Maps as the base layer. At some point, the base layer
> shouldn't actually matter though.
>
> Considering the lack of time that we had for this development, and the
> fact that we could not find any similar existing implementation, we
> finally went for some key features:
> - Pan the map with one finger.
> - Double touching the map zooms around where you touched the map.
> - Double tapping the map zooms out one zoom level.
> - Pinching the map stretches the map in real time, with a minimal
> amount of lag.
> - Had to use HTML5/CSS3 there.
> - While pinching, you can also pan.
> - If you pan or zooms the map, and your fingers leave the screen and
> touch it again quickly enough, you continue the current map
> manipulation.
> - Map panning or stretching, while your fingers touch the screen acts
> on all visible layers, whatever their type may be.
>
> It was very important to us that while the fingers move the map or
> stretch it, the expected result had to be visible in real-time, like it
> does with the Google Maps App on iPAD.
>
> In the end, we actually could achieve all these goals. It means that we
> could get map behaviour comparable, or even better, to what one gets on
> http://maps.google.com.
> We couldn't reach all Google Maps App behaviour because of our lack of
> time though.
>
> As you may imagine, achieving these features in the amount of time that
> we had, we actually hacked quite a lot of OpenLayers code. We'll
> probably take some time
> in the next few weeks to make it more portable so we can use it in all
> our mobile device projects, but doing all this hacking made us curious.
>
> What ar
> e the current plans for OpenLayers regarding the support for
> most mobile devices? In our case, all those tablets coming on looks like
> a really promising market.
> Do you guys plan on actually putting any effort in supporting mobile
> devices? Do you think that the current OpenLayers architecture can
> support such changes, or a new dedicated framework should be developed?
> When are you planning on using HTML5/CSS3, since it makes the overall
> experience more pleasing to the user?
>
> We're really curious to hear about what you guys think about all this.
>
> _______________________________________________
> Dev mailing list
> Dev at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/openlayers-dev
>
>
>
> --
> Benoît Quartier
>
> Camptocamp SA
> PSE-A, Parc Scientifique EPFL
> CH-1015 Lausanne
>
> Tel: +41 21 619 10 40
> Fax: +41 21 619 10 00
>
>
>
>
>
>
> --
> Benoît Quartier
>
> Camptocamp SA
> PSE-A, Parc Scientifique EPFL
> CH-1015 Lausanne
>
> Tel: +41 21 619 10 40
> Fax: +41 21 619 10 00
>
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> End of Dev Digest, Vol 51, Issue 24
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