[OpenLayers-Users] Large Vector Layer

[Scott Davis]

Gregor, ChrisH, Eric, and Christopher,

Thanks for all of your help. WFS it is...for now.

Cheers,
s

Scott Davis
scott at davisworld.org



On Aug 17, 2007, at 7:16 AM, Christopher Schmidt wrote:

> On Fri, Aug 17, 2007 at 03:02:25PM +0200, Eric Lemoine wrote:
>> Hi Scott,
>>
>> Answering two of your questions below:
>>
>> On 8/16/07, Scott Davis <scott at davisworld.org> wrote:
>>>
>>> [...]
>>>
>>> Thanks for taking the time to respond, Gregor. I really appreciate
>>> it. However my questions remain:
>>> Does WFS sound like the right solution -- given a 10k datalayer than
>>> needs hover capabilities -- for out of the box OpenLayers 2.4 and
>>> GeoServer 1.6.nightly?
>>> Does GeoRSS currently get constrained to the map bbox like WFS in
>>> OpenLayers 2.4?
>>
>> I've just looked into the code, and it seems to me that the GeoRSS
>> Layer doesn't do what you want - it does not constrain its request to
>> the map bbox. Hopefully, someone can confirm here...
>
> This is true. The way to do this going forward is probably to
> finish/create the GeoRSS 'read' support for the GeoRSS format class:
> this will allow one to simply pass {'format':OpenLayers.Format.GeoRSS}
> to the WFS layer, and it will parse the data as GeoRSS instead of GML.
> (This works today with KML, though I'll admit the KML support isn't  
> that
> great to begin with.)
>
>>> Any thoughts on the differences/benefits/drawbacks of an old Marker
>>> layer vs. a new Vector layer?
>>
>> With the new Vector Layer, not only can you display points, but also
>> lines, polygons, etc. And if you use the current SVN code, you can
>> also display markers in a Vector Layer, using the externalGraphic
>> property. So Basically, I don't see any advantages of using the old
>> Markers Layer.
>
> It works in Safari 1/2. It supports offsets, so a marker can be
> positioned relative to a point (so the marker points accurately at the
> point). It makes registering click events to cause popups or similar
> easier. It's longer used, and therefore better tested.
>
> Again going forward, it's likely that if you have lots of vector data,
> that the vector layers will be what you want. However, if you just  
> want
> to stick something on the map and have clickable popups -- the default
> 'mashup' use case -- then you probably want to stick with markers for
> the time being.
>
>>> Does OpenLayers 2.5 RC 1 bring anything to the party that would
>>> significantly ease my pain?
>
> 2.5 RC1 doesn't exist yet, for the record, but the answer either  
> way is
> "No".
>
> Regards,
> -- 
> Christopher Schmidt
> MetaCarta