On 8 Feb., 18:25, Rossko <[email protected]> wrote:
> > But cases I intend to detect are more like zoom situations in which,
> > for example, the whole american continent is visible in the west, then
> > going east the whole of Africa, Europa, Asia and Australia is visible
> > and then in the rightmost area of the visible map America appears
> > again.
>
> The extra detail simplifies things considerably...
> Find out the width in pixels
> Find out pixels-per-degree at the equator for the given zoom level.
> Divide to find out if more than 360 degrees in view.
Thank you for your help so far. Starting from what you wrote I tried
the following:
function mapWraps(){
var mapWidth = map.getSize().width;
var proj = map.getCurrentMapType().getProjection();
var wrapWidth = proj.getWrapWidth(map.getZoom());
if (mapWidth > wrapWidth) return true;
else return false;
}
That is, I compared the width of my map window to the width of the map
of the entire Earth, given the current map type and the current zoom
level.
Nevertheless, I would like to understand your suggestion completely. I
looked for a way to get the pixels-per-degree at the equator but
merely found a hint to do this using
map.getCurrentMapType().pixelsPerLonDegree[zoom]. This array seems not
to exist any more in the current API. So, how would I get the pixels-
per-degree, then?
Florian
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