Mapstraction - Aug 2011 - Marker anchor value: google x openlayers

Hi all,

When adding a marker to the map, I noticed a difference in the way you do it
using Google Maps or Open Layers... I wanted to confirm with you if it isnt
a bug.

When we add the same marker using googlev3 api or openlayers, we can call
the setIcon method to set a different icon for our marker.

One of the parameters of this method is the anchor, which is an offset, in
pixels, of the position that should be pointing to the place no the map.

What I noticed is that, if I want to add exactly the same image as an marker
in both providers, I have to multiply the anchor values with -1 in
openlayers to have the same result as in googlev3.

So, lets say we have an icon with dimensions: 24x24, and the anchor is
exactly in the middle (12x12). In google it works fine, but in openlayers I
have to pass -12x-12.

Is that right? I think mapstraction should work with only one way of passing
these values. If a openlayer need to receive it different, mapstraction
should translate it...

Is that right?

Leo,,,

-- 
leogermani.com.br
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I submitted a pull request to fix this in openlayers, but it hasn''t
been
applied yet:

https://github.com/mapstraction/mxn/pull/68

-dylan-

On Mon, Aug 29, 2011 at 1:43 PM, Leo germani <leogermani at gmail.com>
wrote:
> Hi all,
>
> When adding a marker to the map, I noticed a difference in the way you do
> it using Google Maps or Open Layers... I wanted to confirm with you if it
> isnt a bug.
>
> When we add the same marker using googlev3 api or openlayers, we can call
> the setIcon method to set a different icon for our marker.
>
> One of the parameters of this method is the anchor, which is an offset, in
> pixels, of the position that should be pointing to the place no the map.
>
> What I noticed is that, if I want to add exactly the same image as an
> marker in both providers, I have to multiply the anchor values with -1 in
> openlayers to have the same result as in googlev3.
>
> So, lets say we have an icon with dimensions: 24x24, and the anchor is
> exactly in the middle (12x12). In google it works fine, but in openlayers I
> have to pass -12x-12.
>
> Is that right? I think mapstraction should work with only one way of
> passing these values. If a openlayer need to receive it different,
> mapstraction should translate it...
>
> Is that right?
>
> Leo,,,
>
> --
> leogermani.com.br
>
> _______________________________________________
> Mapstraction mailing list
> Mapstraction at lists.mapstraction.com
> http://lists.mapstraction.com/listinfo.cgi/mapstraction-mapstraction.com
>
>
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