[GRASS-dev] projection system in metadata [was: Re: <GSoC 2015> <Improved metada for GRASS GIS> <week 4>]

[Margherita Di Leo]

On Mon, Jun 22, 2015 at 4:02 PM, Moritz Lennert <
mlennert at club.worldonline.be> wrote:

> On 22/06/15 15:40, Margherita Di Leo wrote:
>
>> Hi,
>>
>> On Mon, Jun 22, 2015 at 10:18 AM, Moritz Lennert
>> <mlennert at club.worldonline.be <mailto:mlennert at club.worldonline.be>>
>> wrote:
>>
>>     Hi Matej,
>>
>>     Thank you for the updates.
>>
>>     I have one question concerning the metadata templates: do I
>>     understand correctly that by default, neither the basic, nor the
>>     inspire template contain a reference to the projection system ?
>>
>>     IIUC, INSPIRE currently does not impose this, but I don't really
>>     understand how such basic information can be missing from the
>>     metadata. What help is the bounding box info, if we don't know in
>>     which CRS it is ?
>>
>>
>> I agree that it sounds strange, however the bounding box is given in
>> geographic (unprojected) coordinates, and the ISO 19115:2003, where the
>> GeographicBoundingBox comes from, reads (B.3.2.1): "geographic position
>> of the dataset NOTE This is only an approximate reference so specifying
>> the coordinate reference system is unnecessary "
>>
>
> Using g.gui.metadata on the hospitals map in nc_spm_08, I get:
>
>       <gmd:extent>
>                 <gmd:EX_Extent>
>                     <gmd:geographicElement>
>                         <gmd:EX_GeographicBoundingBox>
>                             <gmd:westBoundLongitude>
>                                 <gco:Decimal>308097.937400562</gco:Decimal>
>                             </gmd:westBoundLongitude>
>                             <gmd:eastBoundLongitude>
>                                 <gco:Decimal>20235.5644005626</gco:Decimal>
>                             </gmd:eastBoundLongitude>
>                             <gmd:southBoundLatitude>
>                                 <gco:Decimal>914347.8748615</gco:Decimal>
>                             </gmd:southBoundLatitude>
>                             <gmd:northBoundLatitude>
>                                 <gco:Decimal>156998.1718615</gco:Decimal>
>                             </gmd:northBoundLatitude>
>                         </gmd:EX_GeographicBoundingBox>
>                     </gmd:geographicElement>
>                 </gmd:EX_Extent>
>             </gmd:extent>
>
> Looks like projected coordinates to me...


I would say this is a bug.



-- 
Best regards,

Dr. Margherita DI LEO
Scientific / technical project officer

European Commission - DG JRC
Institute for Environment and Sustainability (IES)
Via Fermi, 2749
I-21027 Ispra (VA) - Italy - TP 261

Tel. +39 0332 78 3600
margherita.di-leo at jrc.ec.europa.eu

Disclaimer: The views expressed are purely those of the writer and may not
in any circumstance be regarded as stating an official position of the
European Commission.
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