Agreed. I don't think it's guaranteed that the GROUP_CONCAT will
respect the order of items it's given. (I believe this is a standing
well-known requested feature in SPARQL circles).
But yet, it seems to work.
eg here's a version of the previous query, sorted by longitude
https://w.wiki/4kXS
and the points *do* seem to be being joined together in the right order.
-- J.
On 27/01/2022 13:39, Bruno BELHOSTE wrote:
> The real problem is how to order the events in the query according to
> their dates in order to draw the line from one event place to the next
> event place.
>
> It is clearly not easy.
>
> Best,
>
> Bruno
>
> Le 27/01/2022 à 14:04, James Heald a écrit :
>> You're looking for a query like this one, I think
>>
>>
https://w.wiki/4kW4
>>
>> but adapted to your data.
>>
>> All best,
>>
>> James.
>>
>>