[GeoNode-users] Documentation for CSW

[Tom Kralidis]

Hi Israel:

On Tue, 3 May 2016, Israel López wrote:

> Date: Tue, 3 May 2016 22:47:21 -0500
> From: Israel López <asralf at gmail.com>
> To: Tom Kralidis <tomkralidis at gmail.com>
> Cc: Simone Dalmasso <simone.dalmasso at gmail.com>,
>     geonode-users <geonode-users at lists.osgeo.org>
> Subject: Re: [GeoNode-users] Documentation for CSW
> 
> Thanks so much Tom, your information is very useful.
>
> I've tested it, but I have two observations in the ISO query:
>
> 1. In keywords (maybe it was type error), I could get it but without the
> number "2"
> at final of the query, i. e.
>
> print csw.records.itervalues().next().identificationinfo[0].keywords
>

Good catch.  .keywords2 was added in a recent version of OWSLib, which likely hasn't
made it to GeoNode and will replace .keywords over time.  Having said this, using
keywords is fine.

> 2. For the TopicCategory, I can't get it still. The returned value is an
> empty array.
> I attach an image.
>
> [image: Imagen integrada 2]
>
> when I get the ISO metadata via geonode interface, using this:
>
> http://ide.adesur.centrogeo.org.mx/catalogue/csw?outputschema=http%3A%2F%2Fwww.isotc211.org%2F2005%2Fgmd&service=CSW&request=GetRecordById&version=2.0.2&elementsetname=full&id=63444cf2-f984-11e4-89e1-0050569122ab
>
> I can see that the category is there, and I know that the resource have it.
>
> I don't know if a parameter is missing to query the full metadata or
> something else.
>

When I query your CSW, I'm able to see the topic category for that record:

>>> csw.getrecordbyid(['63444cf2-f984-11e4-89e1-0050569122ab'], outputschema='http://www.isotc211.org/2005/gmd', esn='full')
>>> csw.records['63444cf2-f984-11e4-89e1-0050569122ab'].identificationinfo[0].topiccategory
['environment']

> Israel Lopez
>
>
> 2016-05-03 19:01 GMT-05:00 Tom Kralidis <tomkralidis at gmail.com>:
>
>> Hi Israel: thanks for the info.  This should work.  Notes:
>>
>> - in the default CSW schema representation, keywords are represented by
>> 1..n dc:subject elements.  You can access this in OWSLib via:
>> csw.records.itervalues().next().subjects
>> - Categories need to be set in the UI or provided via ISO metadata (which
>> supports a TopicCategory element), and are then available via querying the
>> CSW for an ISO schema representation, i.e.:
>>
>> csw.getrecords2(outputschema='http://www.isotc211.org/2005/gmd')
>> print csw.results
>> print csw.records.itervalues().next().identificationinfo[0].topiccategory
>> print csw.records.itervalues().next().identificationinfo[0].keywords2
>>
>> Having said this, there is currently no way to express the Category in
>> the default CSW schema provided by pycsw.  I've filed a pycsw issue [1]
>> to fix this for cases where the core CSW schema is the preferred option.
>>
>> Hope this helps.
>>
>> Thanks
>>
>> ..Tom
>>
>> [1] https://github.com/geopython/pycsw/issues/432
>>
>> On Mon, May 2, 2016 at 4:46 PM, Israel López <asralf at gmail.com> wrote:
>>>
>>> Hello Tom, thanks so much for the info, well I'm running the next
>> commands
>>> on
>>> a python console:
>>>
>>>>>> from owslib.csw import CatalogueServiceWeb
>>>>>> csw =
>>>>>> CatalogueServiceWeb('http://ide.adesur.centrogeo.org.mx/catalogue/csw
>> ')
>>>>>> csw.getrecords2(maxrecords=1000)
>>>>>> csw.results
>>>
>>> According with this documentation:
>>>
>>> https://geopython.github.io/OWSLib/#csw
>>>
>>> for testing purpose I use this, to retrieve a specific field:
>>>
>>>>>> print csw.records.itervalues().next().title
>>>
>>> for title and abstract I don't have any troubles, but for things
>>> like keywords and others, It doesn't work.
>>>
>>> I'lll appreciate your help..
>>>
>>>
>>> Israel Lopez
>>>
>>>
>>>
>>> 2016-04-30 13:01 GMT-05:00 Tom Kralidis <tomkralidis at gmail.com>:
>>>>
>>>> Hi Israel: thanks for the info.  To add to Simone's recommendation:
>>>>
>>>> - the physical mappings in GeoNode are defined in [1] and follow the
>>>> semantics defined in [2]
>>>> - GeoNode's CSW support (pycsw) uses GeoNode's "ResourceBase" model [3]
>>>>
>>>> Having said this, things like keywords and categories should work out
>>>> of the box in
>>>> GeoNode's CSW per se.  Can you provide a workflow so I can reproduce?
>>>>
>>>> Thanks
>>>>
>>>> ..Tom
>>>>
>>>> [1]
>>>>
>> https://github.com/GeoNode/geonode/blob/master/geonode/catalogue/backends/pycsw_local_mappings.py
>>>> [2]
>>>>
>> http://docs.pycsw.org/en/latest/administration.html#mapping-to-an-existing-repository
>>>> [3]
>>>>
>> https://github.com/GeoNode/geonode/blob/master/geonode/base/models.py#L226
>>>>
>>>> On Sat, Apr 30, 2016 at 7:04 AM, Simone Dalmasso
>>>> <simone.dalmasso at gmail.com> wrote:
>>>>> Hi,
>>>>>
>>>>> Here you will find the docs http://pycsw.org/
>>>>>
>>>>> Hope this helps.
>>>>>
>>>>> Il sabato 30 aprile 2016, Israel López <asralf at gmail.com> ha scritto:
>>>>>>
>>>>>> Hi dear devs I'm looking for documentation for the use of
>>>>>> the geonode's catalogue service (CSW), i want to know
>>>>>> how to configure it, mapping and get specific metadata fields.
>>>>>>
>>>>>> Right now I just can get the title and the abstract of the resources,
>>>>>> but I cannot get things like the keywords and categories, this
>>>>>> information is important to me.
>>>>>>
>>>>>> Any help is valuable, thanks in advance,
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Simone
>>>>>
>>>>> _______________________________________________
>>>>> geonode-users mailing list
>>>>> geonode-users at lists.osgeo.org
>>>>> http://lists.osgeo.org/mailman/listinfo/geonode-users
>>>>>
>>>
>>>
>>
>