[OpenLayers-Users] vector functions, limitations of the browsers

[Christopher Schmidt]

On Mon, Oct 15, 2007 at 07:59:19PM +0200, Arnd Wippermann wrote:
> Hello,
> 
> to test the capabilities of the OpenLayers vector functionality I have build
> some example. I am impressed, what currently is possible.
> 
> Also there seem to be some limitations:
> 
> 1. Center with FF and IE
> on high zoomlevels the browsers have problems to change to the new center,
> when a vector layer with features all over the world are visible.
> (be calm, they come back after a while). On low zoomlevels the browsers
> center right away.

This sounds like it's specific to the number of features you're loading,
and also may depend on how you're loading them. (Are you sure it's
OpenLayers, and not the server, taking the time? etc.)


> 2. Displaying Vector Features with FF
> FF has problems to show kml-layers with large extents (or many points?).
> I have a layer World.
> The layer is created as GML-layer with the kml-file OL_World_to.kml. With FF
> there ar no features on the layer. Obviously the kml-file is not loaded.
> The layer WFS Layer Poly shows the same geometry as the kml-file
> 
> IE6 shows the kml-file in the correct way.

> This is the link to the example:
> http://gis.ibbeck.de/ginfo/apps/OLExamples/SphericalMercator/OL_900913_frame
> s.html

Returns: Bad LineString point coordinates: 97.3425581746657

Which means that the coordinates are getting cut off early, because the
element is too long. Since only 6 decimal places are important, you can
trim each of your numbers by about half, and then your coordinates node
will be less than the 4k limit on element values. 

We fixed this for GML. We didn't for KML. #1088 filed.

> 3. Modify Tool with IE6
> The keybord functions ('d', 'del' and 'k') don't work.

http://trac.openlayers.org/ticket/864 is probably part of this.

Regards,
-- 
Christopher Schmidt
MetaCarta