[Qgis-user] Applying a label to a point in a series of points

[Phil]

On 11/28/25 08:10, Brent Wood wrote:
> Hi & welcome...
>
> I find this aspect is better addressed as a data management issue 
> rather that a labelling one.
>
> If your data is managed in database tables (Postgis, Spatialite, 
> MariaDB/MySQL are the obvious free ones that work well with QGIS) then 
> appending new points to existing lines and making lines from points is 
> simple spatial data management. You can also set up a "view" - 
> essentially a stored query acting like a physical table of data - 
> returning, for example, the last point in a linestring.
Thank you Brent for taking the time to reply.

In the past three weeks since my first posting I managed to collect, 
over a ten hour period, roughly 250 aeroplane positions. I used Python 
to extract the data needed and assemble the result into a CSV file. This 
doesn't occur in real time.

Many of the aeroplanes were only received once and so I wasn't able to 
plot a track for those aeroplanes and not all reception reports were 
complete resulting in track errors.

I'm only vaguely familiar with SQL and haven't used it, or even thought 
about it, since my university days and I'm now in my late seventies. I'm 
not sure, at the moment, how a database would benefit my project but 
I'll give it some more thought. Maybe I can feed live data into MySql? 
Now, after a few minutes of thought, I may be able to feed an SQL query 
into QGIS in real time. Another project to play with.

-- 
Regards,
Phil
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