Geographic Information Systems Asked by robert tuw on June 15, 2021
i am working with temporal controller for just a cluple of days – before i’ve been using time manager. right now i am searching for a way to display the last/latest/most recent feature within a time interval which is defined by the "Frame" settings of the "Temporal Controller" GUI.
finally it should look like img_01 (see below):
the yellow trace is implemented already and works fine.
but the red dot is the thing i am asking for …
within my time frame of 15min the temporal manager returns a set of 3 (sometimes 4) points. and i would like to implement kind of a selection algorithm that returns just this one point, which is the last one within the frame i.e. the one with the MIN value of an expression that could look like @map_end_time - "points_time"
i have been trying differnet things but
to_datetime(@map_start_time + '2 Hour')
could be translated into QGIS Query Builder syntax ? (the expamle works fine in QGIS expressions -> see labels/last line out of 4 in img_02)img_02:
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