Custom overlay disappears at certain zoom level

[Boris Rarden]

I am having a problem with a custom overlay icon marker in google maps. It works fine at all zoom levels, but disappears at max zoom. In the demo only the lower icon disappears, but the upper one is ok.

Demo: http://random.hypervolume.com/map_bug.html

Try to zoom in on the lower marker, the one on 34-th street. At max zoom level it disappears.

[Rossko]

> Try to zoom in on the lower marker, the one on 34-th street. At max zoom
> level it disappears.

Not for me ; it is just not where you expected - look 'up and to the
left'.
Your image top left corner is nailed to a geographic position away
from the intersection ; maybe you meant to nail its centre to a
geographic point instead.

Why not just use ordinary marker icons with custom images?

[Boris Rarden]

It happens in Safari 5.1 on a mac. As well it happens in iPhone simulator 4.3.  

I just tested it in Google Chrome (on mac) and Firefox 3.6 (on mac) and it doesn't happen -- it works properly.

I looked up and to the left and it is not there. Furthermore, I used firebug to see that it is actually hidden behind the map layer. This is illustrated in the screenshot attached. In one of the screenshots, as I point my mouse on the marker element in debug console, I see it highlighted -- this means I'm pointing to the right element. After I zoom in, it just highlights a blank square.

[Boris Rarden]

I'm not using ordinary markers with custom images, since I would like to put a number inside the circle. (This represents a cluster).

[Rossko]

> It happens in Safari 5.1 on a mac

I'm unable to help with that.

> I'm not using ordinary markers with custom images, since I would like to put
> a number inside the circle. (This represents a cluster).

Like MarkerClusterer does
http://google-maps-utility-library-v3.googlecode.com/svn/tags/markerclustererplus/2.0/examples/simple_example.html
does that work in Mac Safari?

>  visible.png
> 45KViewDownload
>
>  max_zoom.png
> 49KViewDownload

[Boris Rarden]

My code is based on the MarkerClusterer code.  However, it is hard to see this in their demo, since at max zoom level the cluster is replaced by a normal marker.  So I can't test that without ripping the MarkerClusterer code appart.

[Rossko]

> My code is based on the MarkerClusterer code.

Slooowly the info comes out

> So I can't test that without ripping the MarkerClusterer
> code appart.

Put a bunch of markers very close together?

[Boris Rarden]

Ok, it doesn't happen with MarkerClusterer.  Here's an equivalent demo:

http://random.hypervolume.com/marker_clusterer.html

It is not clear to me why that happens, but I think it has to do with hiding & showing the overlay that the ClusterMarkerer does, but in my case I just don't touch it.  It is still  a bug in my opinion.

Boris

[Boris Rarden]

It is still happening, I don't know how to fix this, and it shouldn't be hapenning -- it is a bug. Here's another demonstration:

http://random.hypervolume.com/map_bug2.html

[en4ce]

i have the very same problem, any suggestions?

[Rossko]

> i have the very same problem, any suggestions?

Where is your demo, perhaps it will offer more insight?
Only going wrong on mac/safari too?

[Morgan]

I have run this demo on the iPad2 iOS 6.01(10A523) / Safari and the marker on 34th street does indeed disappear on max zoom.

[Boris Rarden]

See this bug report I openned, it may be related: https://groups.google.com/forum/?hl=en&fromgroups=#!searchin/google-maps-js-api-v3/Boris$20Rarden/google-maps-js-api-v3/OMsSuffpJhs/wJpk_sFbvlMJ