Message-ID: <556B2B6C.9030202@ase-research.org>
Date: 2015-05-31T15:40:28Z
From: Mathieu Basille
Subject: decrease sampling rate of GPS track observations
In-Reply-To: <CAFXiavbMeJ8XYukQzUkLJPaoY_AQ6czG3Cr7m+J-4bXgLG-3EA@mail.gmail.com>
Hi Erdal,
Your best shot is probably to use adehabitatLT, prepare your track as a
regular trajectory (i.e. with perfectly equal time lags, and missing
observations present in the trajectory), and then use 'subsample'.
Look at the vignette of adehabitatLT [1] for the first steps to get a
regular trajectory.
Hope this helps,
Mathieu.
[1]
http://cran.r-project.org/web/packages/adehabitatLT/vignettes/adehabitatLT.pdf
Le 31/05/2015 03:58, Erdal Karaca a ?crit :
> Hi all,
> I have a GPS track with a sampling rate of 1 observation per second.
> I would like to decrease the number of observations to, for example, 1
> observation per 10/20/30 sec or drop all observations between turning
> points. What function/package would be best suited?
>
> Thanks.
>
> Best regards,
> Erdal
>
> [[alternative HTML version deleted]]
>
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Mathieu Basille
http://ase-research.org/basille
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