Martin Desruisseaux ha scritto:
> Andrea Aime a écrit :
>> Can't set a value to the parameter "Latitude of natural origin".
>> Can't set a value to the parameter "Scale factor at natural origin".
> 
> May be missing aliases. I will look at that we I will have a chance.

Cool, thanks :-)

...
>> No transform for classification "Tunisia Mining Grid".
> 
> They are unimplemented map projections, except "Lambert Azimuthal Equal Area"
> which is available only on trunk at this time. We need volunter time for
> implementing the remaining ones. We can't expect those projections to be
> implemented for Geotools 2.3.

Yup, as I said, I did not foresee fixes for these.

...
>> Type "north-west" is unknow in this context.
> 
> The message is a little bit misleading. On trunk, I'm changing it for "Unknown
> axis direction". This is related to http://jira.codehaus.org/browse/GEOT-936 
> and
> I started to work on it yesterday. I don't plan to port it to the 2.3 branch
> however.
> 
> This issue appears in map projections used for North or South poles. Instead 
> of
> "East" and "North" axis directions, map projection has for example the 
> following
> axis:
> 
>   * South along 180 deg
>   * South along 90 deg East
> 
> The referencing module was not prepared to handle this kind of axis 
> directions,
> so supporting them will need some though and will not be fixed in 2.3.

I see. Good, no problem.

> Geotools provides a hint for forcing units to decimal degrees:
> Hints.FORCE_STANDARD_AXIS_UNITS. The idea is similar to
> Hints.FORCE_LONGITUDE_FIRST_AXIS_ORDER. By default this hint is not set.
> 
> I suspect that many GIS implementation ignore sexagesimal units and use 
> decimal
> units instead, in the same way than they ignored the (latitude, longitude) 
> axis
> order. However I would need a confirmation of that before changing the 
> default,
> if we change it.

Cool, I will enable that hint on geoserver startup too.

> I'm not sure that we should change the default since many CRS using 
> sexagesimal
> degrees in the EPSG database have been deprecated and replaced by an other CRS
> using decimal degrees. So I assume that if a user ask for a deprecated CRS, he
> know what he is doing. 

That's quite a leap of faith, users sometimes just fiddle around hoping 
things will start working as they expect :-)

> Do we receive bug reports from users about the "Unit
> conversion from DMS to ° is non-linear" exception?

Nope. See the end of the mail thought

>> Unsupported unit: 9120
> 
> They are different flavour of DMS units. Not all of them are supported, and I 
> do
> not plan to support them shortly (it will be easier after we switch to the
> JScience units framework).

Ok, everything is cool. Ok, let me go back to the reason I added these
error reports in Geoserver. At the moment, users are allowed to add 
custom projections in a separate file. Error reporting is important for 
those, so that the use may learn why a projection he added is not being
shown by Geoserver.
Is there any way to tell which authority did generate a certain CRS, so 
that I can report CRS decoding failures only for user provided ones?

Cheers
Andrea

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