[OpenLayers-Users] Markers and Vector-Features displaced after mouse-dragging

[Zimmermann, Tobias]

Hi again!

I'm trying to do some guesswork on this behaviour:

- Since the markers stay correct with a Google-Maps-Base-Layer I assume
that OpenLayers uses the GoogleMaps-API function to display them... 

- This is documented somewhere and I haven't found it yet...

- I have not initialized the Base-Layer in the right way...

- You would like to see some examples.

- OpenLayers does some rounding-errors while calculating the new
positions (which would puzzle me because the vector-example seems to
display them really fixed at their positions).

Btw: The same thing happens when zooming is done on the map.

It would be really nice if someone could tell me about the reliability
of Vector-Features. I'm trying to display routing-results which should
match to the underlying map-routes. If OpenLayers is not able to display
them correctly I would be in less trouble since I have an explanation ;)

Thanks,

Tobias

> Hi there!
> 
> I'm trying to display some Vector-Features (LineStrings) with Markers
at their endpoints. 
> My base-layer is requested from my own MapServer using an
Untiled-Layer. My OpenLayers-Version is 2.4 
> (the downloadable stable Version).
> 
> After initializing the map looks fine but after dragging the map lines
and markers are displaced a little bit. 
> Changing the Base-Layer to Google-Maps let the markers stay at their
intended position but shifts the vector-features. 
> The only base-layer which does not seem to show displaced features and
markers is the one I found on the examples page. 
> 
> Has someone seen this behaviour before?
> 
> Kind regards and many thanks in advance,
> 
> Tobias Zimmermann