[OpenLayers-Users] Marker Disappearing

[Erik Uzureau]

Hey John... if you believe it or not.... a good year and change later
we may have finally gotten a fix
cooked up for this. See
http://trac.openlayers.org/ticket/987

This fix will be in the 2.7 release of OpenLayers, hopefully out by
late september.
Erik

On Tue, Jul 10, 2007 at 10:04 AM, John Cole <john.cole at uai.com> wrote:
> Erik,
>  I simply copied the resolution list passed to the base layer, as an option
> on the marker layer.  I think Christopher was concerned that the marker
> layer was not picking up the valid zoom levels from the base layer by
> default.  I tend to think that the markers, given no other parameters,
> should be visible at all zoom levels valid for the base layers.
>
>  Hope this makes things clearer :-)
>
> John
>
> -----Original Message-----
> From: euzuro at gmail.com [mailto:euzuro at gmail.com] On Behalf Of Erik Uzureau
> Sent: Monday, July 09, 2007 4:42 PM
> To: John Cole
> Cc: Christopher Schmidt; Lee Keel; users at openlayers.org;
> euzuro at metacarta.com
> Subject: Re: [OpenLayers-Users] Marker Disappearing
>
> Hi John,
>
> Can you be more specific about what you did that fixed your problem?
>
> Is this something that we should fix in the code?
>
> Still not quite clear to me.
> Erik
>
> On 6/27/07, John Cole <john.cole at uai.com> wrote:
>> Christopher,
>>   Just wanted to let you know that adding the resolutions to the new
>> OpenLayers.Layer.Markers call worked.  Thanks for the help!
>>
>> John
>>
>> -----Original Message-----
>> From: users-bounces at openlayers.org [mailto:users-bounces at openlayers.org]
> On
>> Behalf Of Christopher Schmidt
>> Sent: Wednesday, June 27, 2007 10:26 AM
>> To: Lee Keel
>> Cc: users at openlayers.org; euzuro at metacarta.com
>> Subject: Re: [OpenLayers-Users] Marker Disappearing
>>
>> On Wed, Jun 27, 2007 at 09:44:59AM -0500, Lee Keel wrote:
>> > Hello All,
>> >
>> >
>> >
>> > We are experiencing a disappearing marker when the user zooms in after
>> > placement of the marker.  You can see this @
>> > http://hud.uai.com/hudpls/ViewMap.aspx?FindAddTI=1 then by doing an
>> address
>> > search.  The marker will remain as long as you are at the current zoom
>> level
>> > or above, but disappears when you zoom in beyond the initial level.
> Here
>> is
>> > the code I am using to create the marker.
>>
>> Change this:
>>
>> >    addressMarkers = new OpenLayers.Layer.Markers("Find Address");
>>
>> To this:
>>
>> addressMarkers = new OpenLayers.Layer.Markers("Find Address",
>> {'calculateInRange': function() { return true; }});
>>
>> Alternatively, I think the following should work:
>>
>> addressMarkers = new OpenLayers.Layer.Markers("Find Address",
>> {'numZoomLevels':25});
>>
>> But I'm not 100% sure.
>>
>> The problem is that your markers layer is considered 'out of range' for
>> some reason -- changing the numZoomLevels should fix that, but
>> overrdiding the calculateInRange function to always return true should
>> also work.
>>
>> The source of the problem here is probably related to the 'resolutions'
>> setting on your base_wms.
>>
>> Erik, is this the behavior you expected? I think your'e closest to this
>> code -- to reproduce it, simply create a map with an explicit list of
>> resolutions which reaches farther in than the default, and then watch
>> your markers layer turn off when you zoom in past that point.
>>
>> Regards,
>> --
>> Christopher Schmidt
>> MetaCarta
>> _______________________________________________
>> Users mailing list
>> Users at openlayers.org
>> http://openlayers.org/mailman/listinfo/users
>> This email and any files transmitted with it are confidential and intended
> solely for the use of the individual or entity to whom they are addressed.
> If you have received this email in error please notify the sender. This
> message contains confidential information and is intended only for the
> individual named. If you are not the named addressee you should not
> disseminate, distribute or copy this e-mail.
>> _______________________________________________
>> Users mailing list
>> Users at openlayers.org
>> http://openlayers.org/mailman/listinfo/users
>>
> This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the sender. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail.
>