[OpenLayers-Users] Map wrapping?

[Ken Stuart]

Ok, thanks for the suggestions. We'll see how it all works out.

-Ken

On Sat, Mar 8, 2008 at 3:37 PM, Christopher Schmidt
<crschmidt at metacarta.com> wrote:
> On Sat, Mar 08, 2008 at 03:33:29PM -0500, Ken Stuart wrote:
>  > The results might include vectors extending across the dateline, as
>  > well as placing custom point icons that overlie the dateline. Further,
>  > it's likely that we'd want to incorporate drag-boxes for zooming or
>  > annotations that cross it as well.
>  >
>  > Are the dateline issues likely to interfere with those needs?
>
>  Yes.
>
>
>  > Are they being worked on?
>
>  Nope.
>
>  (Note that these problems aren't solved in the Google Maps API, or any
>  other API that I'm aware of: Even Google Earth has problems with
>  wrapping the dateline and the poles.)
>
>  Your best bet, in my opinion, is to project your coordinates such that
>  positions that wuold be less than 0 are 'wrapped' to the righthand side.
>  OpenLayers has no qualms about displaying data across a 180 degree
>  border -- so you simply take anything that's less than 0, add 360 to it,
>  and use that as your data.
>
>  Obviously, this may be non-trivial, depending on your data, but it then
>  removes the dateline wrapping issues that one might run into, since
>  there is no longer a 'dateline' in any meaningful sense.
>
>  Regards,
>  --
>  Christopher Schmidt
>  MetaCarta
>