[thredds] Problems with lonLatEnvelope using WCS with a stereographic file

[John Caron]

hi heiko:

polar projections are particularly ill-fitted to lat/lon bounding boxes. 
i am surprised that the results vary, however, and thats clearly a bug 
well have to look at.

Heiko Klein wrote:
> Hi,
>
> I have a file with gridded polar-stereographic data in CF-1.0, which
> shows nicely in IDV. When putting the file on thredds and requesting WCS
> GetCapabilites, I receive the following:
>
> First try:
>
> <lonLatEnvelope srsName="WGS84(DD)">
> <gml:pos>-77.0 43.95245311362685</gml:pos>
> <gml:pos>103.0 43.95245311362685</gml:pos>
> </lonLatEnvelope>
>
>
> Second try:
> no envelope
>
> Third try:
> <lonLatEnvelope srsName="WGS84(DD)">
> <gml:pos>-32.0 90.0</gml:pos>
> <gml:pos>-32.0 90.0</gml:pos>
> </lonLatEnvelope>
>
> And it stays at the values of the third try, which are the definitions
> of the projections (polar-stereographic, view at -32 degree) rather than
> the envelope.
>
> The data spans over the northpole, so longitude is from 0-360 while
> latitute starts at 90 and has a minimum value of 43 degree.
>
> The file can be found at ftp://ftp.met.no/pub/emep/heikok/testShort.nc
> (1.6MB)
> I'm running thredds 3.16 on linux with java 1.6 and tomcat 6
>
> Does anybody know how I can solve the problem of the wrong envelope?
>
> Best regards,
>
> Heiko
>