Yeah, I’ve got a distance reference that covers the amount of distance covered
in the time from the last point. I’m just missing the way to actually do the
calculation in the program. I cant see a way to compare a point to the one
before it.
Thanks!
Dean
Sent from Windows Mail
From: Randal Hale
Sent: Sunday, August 17, 2014 3:22 PM
To: [email protected], [email protected]
I can think of a couple of ways you might be able to do this - but considering
I haven't done something like this before it's a guess.
You can derive an interval in seconds I believe (referencing
http://nathanw.net/2012/06/30/better-date-and-time-support-in-qgis-expressions-and-styles/)
from the point data - I'm assuming you have date and time (or at least time).
You could connect the points with a line (that would give you distance).
I'm thinking this might be better accomplished in a database as opposed to a
shapefile (assuming shapefile).
...and I think I've just given you the most abstract assumed non-answer ever.
Lemme think on this one a bit more. Hopefully someone has a practical answer.
Randy
On 08/17/2014 05:57 PM, [email protected] wrote:
Hi all,
I’m working on some point data that has been collected using a combine in an
agricultural field. Trying to figure out a way to compare speed between the
dropped points? I’m not sure how to start….can anyone help?
Thanks
Dean
Sent from Windows Mail
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