[Mobilitydb-users] MobiltyDB for Windows

[Alan Suc]

Sir,

Thank you for your answer. I tried yours first but it didn't work, while 
M Sakr's one worked, which is quite strange as I reinstalled MobilityDB 
last week so I guess I should have the most recent version. An other 
question, I'm using dwithin() and |=|but those fonctions seems to don't 
work. Indeed, for the dectection of near miss situation between ships I 
use dwithin to detect ships who came closer than 1000m to the one 
studied, but this function seems to don't work as it also select ships 
which were at dozens of kilometers. Also |=| seems lost as it returns a 
distance of 0.53 m at closest point of approach while QGIS measures 59km 
for the same line. I join a screen capture which, I guess, is more more 
explicit.

Best Regards,

A. Suc

Le 31/08/2021 à 18:28, Esteban Zimanyi a écrit :
> Please find enclosed a new version of the function since the suffixes 
> for the subtypes in MobilityDB have been changed to _inst, _instset, 
> _seq, and _seqset for better readability. Usage examples of the 
> function are also included in the file.
>
> On Tue, Aug 31, 2021 at 4:53 PM Mahmoud SAKR <mahmoud.sakr at ulb.ac.be 
> <mailto:mahmoud.sakr at ulb.ac.be>> wrote:
>
>     [...]
>
>     I understand that you got a sequence of (location, timestamp)
>     pairs, from which you want to construct a trajectory. But you want
>     to split into multiple trajectories whenever there is a big gap
>     (in time or in distance) between two consecutive points.
>
>     Enclosed is an SQL function to do this.
>
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