[GeoNode-devel] Non ISO Metadata Topic Categories and Geonode Behavior

[Eduardo Castanho]

Hi to all!

Ihaven’t notice that the flag MODIFY_TOPICCATEGORY already existed.
This flag at the moment only controls the change of the topic categories 
via admin page but doesn’t control if a new topic category can be added 
via metadata, as I described in my first email.
I  will use this flag to control if the metadata can contain new 
categories or not,  returning |'the topic category/theme 'x' is 
invalid!' ||if not.

My doubt is what should be the default/initial value of the flag ? |

The implementation is almost complete I will make a pull request soon.
Regards,

Eduardo Castanho

IPMA
Instituto Português do Mar e da Atmosfera
Lisboa Portugal

On 30-12-2015 21:43, Patrick Dufour wrote:
>
> I agree that multiple categories set for a resourcebase object should 
> be possible.
>
> Yes, with batch metadata editing, fixing by hand shouldn't be difficult.
>
> For the flag, how will GeoNode "know" the categories are ISO.  It's 
> implied, since they are the only ones there by default, but the flag 
> wouldn't trigger an ISO check.  It would just check that the category 
> currently exists or not. Otherwise, we'd probably need another field 
> in the Category model to say whether each is ISO or not.  Either 
> option is acceptable.
>
> Regards,
> Patrick
>
> On Dec 30, 2015 10:37 AM, "Eduardo Castanho" <eduardo.castanho at ipma.pt 
> <mailto:eduardo.castanho at ipma.pt>> wrote:
>
>     Hi! Patrick
>
>     In last day of the code sprint in Turin,  we talked about  the
>     lack of fields in Geonode metatada, comparing with ISO 19115 profile.
>     One of those fields was Topic Category, that isn't fully supported
>     by Geonode, because it only accepts one, more specifically  the
>     first  topic category  value on the metadata file.
>
>     Your  suggestion seems fine to me, but it implies that if you
>     start with the flag on False and then change it  to True, the data
>     that you have in Geonode will be inconsistent, for example, the
>     TopicCategory Model/Table will have non ISO entries.
>     Some sort of solution to minimize this can be implemented, but in
>     my opinion it only will bring an overload to the Geonode and this
>     can be easily managed by "hand".
>
>     May be the name for the FLAG  can be more explicit like
>     ISO_CATEGORIES_STRICT.
>
>
>     Regards,
>
>     Eduardo Castanho
>
>     IPMA
>     Instituto Português do Mar e da Atmosfera
>     Lisboa Portugal
>
>
>
>
>     On 29-12-2015 22:30, Patrick Dufour wrote:
>
>         Good afternoon, Eduardo.
>
>         Could you briefly recap the relevant discussion during the
>         sprint?  I
>         missed that conversation.
>
>         That is the expected behavior.  We wanted to be sure that if you
>         imported data from a source that isn't following that ISO standard
>         closely that the import will work rather than throwing an error.
>         GeoNode will match an existing category if possible and will
>         create a
>         new category if needed.
>
>         I think my preference is to maintain that existing "default"
>         behavior.
>         However, I think a flag in settings like "CATEGORIES_STRICT=False"
>         would work.  If CATEGORIES_STRICT is true, then if a category
>         doesn't
>         match on upload/import an error is thrown.  If
>         CATEGORIES_STRICT is
>         false, then the existing behavior goes.
>
>         Regards,
>         Patrick
>
>         On 12/29/15, Eduardo Castanho <eduardo.castanho at ipma.pt
>         <mailto:eduardo.castanho at ipma.pt>> wrote:
>
>             Hi!! to all
>
>             I'm trying to implement multiple Topic Categories in
>             Geonode, so that
>             the metadata is more according to ISO 19115, as was
>             discussed in this
>             year code sprint.
>
>             But I have a doubt about  the correct  behavior in the
>             upload of
>             metadata that contains Topic Categories that doesn't
>             belong to ISO
>             CodeList.
>
>             Currently, Geonode creates a new  category  :
>
>                                   elif key == 'topic_category':
>                                               value, created =
>                              TopicCategory.objects*.get_or_create*(
>             identifier=value.lower(),
>             defaults={'description': '',
>                              'gn_description': value})
>                                               key = 'category'
>                                               defaults[key] = value
>
>
>             @ geonode/geonode/layers/utils.py (line 442)/****/
>
>             Is this the expected behavior?
>             If we have multiple categories imported from metatada
>             files,  the number
>             of new categories will raise a lot (including spelling
>             errors), can this
>             be bad ?
>
>             with best regards,
>             Eduardo Castanho
>
>             IPMA
>             Instituto Português do Mar e da Atmosfera
>             Lisboa Portugal
>
>

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