On Nov 16, 2010, at 8:31 PM, ext Roald de Wit wrote:
> Hi Phil,
>
> I can reproduce your observations below when I load proj4js-compressed.js or
> proj4js.js (1.0.1 or 1.0.0). Without proj4js fullBounds is OK. Either there
> is a bug in Proj4JS or in OL's use of it. I hope this helps you find out
> where things go wrong.
>
> Regards,
>
> Roald
>
> On 17/11/10 09:23, Phil Scadden wrote:
>> With this code:
>>
>> var p4326 = new OpenLayers.Projection("EPSG:4326");
>> var p900913 = new OpenLayers.Projection("EPSG:900913");
>> fullBounds = new OpenLayers.Bounds(-180.0,-90.0,180,90.0);
>> fullBounds.transform(p4326,p900913);
>> nzArea = new OpenLayers.Bounds(161.0,-50.0,179.99,-31.0);
>> nzArea.transform(p4326,p900913);
>>
>> fullBounds becomes {-pi,-pi/2,pi,pi/2} after the transform, whereas
>> nzArea transforms turns into "proper" Sphericalmercator coodinates. What
>> gives here?
What exactly do you expect to happen when you provide completely unreasonable
values to
reproject? :p Mercator projections go to infinity when you go to +90/-90, so
there is no
actual reasonable thing to return in this case; the current behavior is
certainly not
ideal, but the other option seems to me to be "throw an exception".
(This is why the mercator max bounds are at ~+/-85 degrees in the spherical
mercator
tile bounds.)
-- Chris
>>
>> --
>> Phil Scadden, Senior Scientist GNS Science Ltd 764 Cumberland St, Private
>> Bag 1930, Dunedin, New Zealand Ph +64 3 4799663, fax +64 3 477 5232
>>
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