I am having this same issue. I am trying to position a div to the
marker's position. It works fine on load, but if I change the zoom or
pan the map the information does not change.
/* Attach Mouse Over Event */
google.maps.event.addListener(marker, 'mouseover', function
() {
over = true;
var offset =
marker.projectionController.fromLatLngToDivPixel(marker.position);
$('#map-label').show().css({
position: 'absolute',
top: $('#' + gmap.getDiv().id).offset().top +
offset.y + 'px',
left: $('#' + gmap.getDiv().id).offset().left +
offset.x + 'px'
}).html(html);
});
Is this a v3 issue or am I doing something wrong?
On Sep 10, 10:39 pm, Paul Kulchenko <[email protected]> wrote:
> Berry,
>
> There is still an issue that I can't easily fix. The page is available
> at the same URL (http://my-test.dreamhosters.com/gmap.html);I only
> added x/y offset as calculated by the script and as calculated by
> Google for their tile images.
>
> When the page is loaded, everything looks correct:
>
> This is what I calculated for up/left tile 773x1642: -192x-39
> -192x-39; window 500x300; up-left 773x1642 and down-right 776x1644
>
> this is confirmed by Google (same
> offset):http://mt1.google.com/vt/v=ap.106&hl=en&x=773&y=1642&z=12&s=Gat
> -192pxx-39px
>
> Now drag the map so that the left top corner is closer to the center
> to make one new group of tiles to render:
>
> me: -192x-39; window 500x300; up-left 772x1641 and down-right 775x1643
> google:http://mt2.google.com/vt/v=ap.106&hl=en&x=772&y=1641&z=12&s=Galil
> at -448pxx-295px
>
> you can already see the difference by 256 in both x/y offsets. I
> compensate for this difference by storing *original* tile number
> (773/1642) and applying the diff to the offset to get -448x-295. I'm
> essentially ignoring all calculations of the offset except the first
> one (with few exceptions, for example zoom changes).
>
> Now click "zoom in" button once:
>
> me: -166x-52; window 500x300; up-left 1546x3283 and down-right
> 1549x3285
> google:http://mt0.google.com/vt/v=ap.106&hl=en&x=1546&y=3283&z=13&s=G
> at -422pxx-308px
>
> as you can see, I again get different results, but no way to
> compensate for it as I don't know that this result is different by one
> tile.
>
> Is there a way to adjust the algorithm to calculate the same offset
> Google is calculating for its tiles? Right now the offset that the
> algorithm you suggested earlier in this thread calculates is going to
> be always less than 256, but it seems like in some cases it may be
> larger that that. I didn't notice any discrepancies in the examples on
> your website, but since the code is a bit obfuscated I couldn't see
> where your calculations are different from mine. Thank you.
>
> Paul.
>
> On Sep 1, 4:44 am, bratliff <[email protected]> wrote:
>
> > On Sep 1, 6:26 am, PaulKulchenko<[email protected]> wrote:
>
> > > Bratliff,
>
> > > it all makes sense and it seems to work, but there is one small detail
> > > that bothers me. This is the
> > > link:http://my-test.dreamhosters.com/gmap.html
>
> > > I've implemented the logic as described in this thread and seem to be
> > > getting the correct results, but they are still slightly different
> > > from what gmap is doing. For example, this is what you'll see when you
> > > load the map above:
>
> > > Should I simply ignore the difference or is there a bug in my
> > > calculations?
>
> > If you look at:
>
> > www.polyarc.us/experimental
>
> > you will see the same tile discrepency. It is entirely off screen.
> > It does not really matter. I have not really tried to figure out what
> > is causing it.
>
> > I recycle tiles which means I must allocate enough tiles for the worst
> > case:
>
> > (pixelwidth>>8)+2
> > (pixelheight>>8)+2
>
> > I believe Google allocates an extra tile along each edge also. If you
> > measure from the center pixel rather from the top-left pixel, tile
> > replacements will occur at different points.
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