edgar.sol...@web.de wrote
29.9. 2020 11.57

> morning Jukka,

> On 9/29/2020 9:15, Rahkonen Jukka (MML) wrote:
>>> There would be still some corner cases left (select geom as geometry1, 
>>> ST_Centroid(geom) as geometry2...
>> in theory our features may hold multiple geometries. just one can be shown 
>> though and the second would be like some object attribute. not sure what'd 
>> be a use case for that.

> what about the multiple geometry column issue? what would be a use case for 
> that and how would you suggest to present those in OJ? ..ede

Use cases that I know are like having cities as polygons and points for 
rendering at different scales, or having accurate/generalized geometries for 
the same purpose. The same result can be achieved by having multiple layers 
though there is then unnecessary multiplication of attributes as well. I would 
wait until someone presents a really cool use case and pull request about 
multiple geometry fields in OpenJUMP. Until that I suppose people feel happy if 
this works also in the future as it works now and saves processed geometry as 
WKT into text field. Example tested with Spatialite

select geom, 
ST_AsText(ST_Centroid(geom)) as centroid
from test limit 1;

-Jukka-




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