[R-sig-Geo] SAS to R translation help wanted

[Kamran Safi]

Hi Anthony,

if I am not mistaken, David already started to translate his filter into 
R. At least I know that he wanted to do so. If you really are keen, we 
could give it a try. On the other hand the filter was implemented in 
www.movebank.org
Theoretically, you can upload your data to movebank, filter it according 
to David's filter rules and get it back into R. The advantage being that 
your data is also standardised making it easier for you to recycle your 
code and you have a central repository of your data. Also you can feed 
the diag files to the data base.

We are currently thinking of ways to link movebank with R, so this might 
be even the better option. Let me know what you think or what would be 
most helpful to wildlife trackers.

Best,

Kami



Am 09.11.2011 11:14, schrieb Michael Sumner:
> These filters are easy to implement and are available in contributed R
> packages, but they are not very good. When you say "satellite"do you mean
> Argos or GPS?
>
> Argos recently updated their proprietary algorithms to give better
> estimates but it it is still a rather black box.To me the issue is about
> whether location accuracy of point samples or inference from derived
> metrics of location are more important.
>
>
> Both are very complicated and subject to active research.
>
> I can help you implement these filters but am very loathe to if it it is
> not for comparison-only purposes.
>
> The adehabitat family of packages has very modern methods of deriving
> metrics from track data.
>
> Cheers, Mike
>
>
> On Tuesday, November 8, 2011, Anthony Fischbach<afischbach at usgs.gov>  wrote:
>> Satellite data collection has revolutionized our understanding of animal
>> movmement.
>> Many relocations obtained by satellite data collection suffer large
>> inaccuracies and must be filtered.
>> Carla Freitas has contributed an algorithm for filtering such tracking
> data
>> (http://cran.r-project.org/web/packages/argosfilter/).  For years we have
>> used on an alternative algorithm written in SAS
>> (http://alaska.usgs.gov/science/biology/spatial/douglas.html).  To better
>> serve the wildlife tracking community, we wish to translate this Douglas
>> algorithm from SAS and offer it as a function in the 'argosfilter' R
>> package.
>>
>> For this translation effort we wish to contract help.
>> Interested parties, please contact me directly.
>>
>> -----
>> Tony Fischbach, Wildlife Biologist
>> Walrus Research Program
>> Alaska Science Center
>> U.S. Geological Survey
>> 4210 University Drive
>> Anchorage, AK 99508-4650
>>
>> AFischbach at usgs.gov
>> http://alaska.usgs.gov/science/biology/walrus
>> --
>> View this message in context:
> http://r-sig-geo.2731867.n2.nabble.com/SAS-to-R-translation-help-wanted-tp6976543p6976543.html
>> Sent from the R-sig-geo mailing list archive at Nabble.com.
>>
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