[PROJ] Area of usage (short) name

[Even Rouault]

I don't think EPSG extent short names qualify as identifiers. They might 
be altered between EPSG releases. Only their EPSG code is a true (ie 
unmutable) identifier.

Le 21/07/2023 à 17:46, Martin Desruisseaux a écrit :
> Le 19/07/2023 à 00:02, Even Rouault a écrit :
>> So basically the object model of osgeo::proj::metadata::Extent should 
>> likely be extended with a shortName() getter (the corresponding 
>> GeoAPI class that serves as the inspiration, 
>> http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/metadata/extent/Extent.html, 
>> has a single getDescription()), a C binding to get it (likely 
>> proj_get_area_of_use_ex2()), and 
>> AuthorityFactory::Private::createPropertiesSearchUsages() be modified 
>> to populate it.
>
> Alternatively if the short area name can be seen as an identifier, 
> then in ISO 19115 model it can be a GeographicDescription. That 
> description can then be included among the values returned by 
> Extent.getGeographicElements().
>
> Note: EPSG defines domain of validity not only by bounding boxes or by 
> names, but also by polygons stored as Shapefile. The latter could be 
> returned by BoundingPolygon in ISO 19115 model. Said otherwise, 
> Extent.getGeographicElements() allows to specify an area of validity 
> in different ways:
>
>   * By identifier
>   * By bounding box
>   * By bounding polygon
>
> Those 3 ways can be made available together.
>
>     Martin
>
>
>
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