[adegenet-forum] Coordinates and distances in sPCA

[Tagliamonte,Massimiliano S]

Yeah, that is the problem with UTM coordinates. I do not know a way around it, someone else may know better than me.
Are you sure you need sPCA from such distant areas? Have you already tried PCA? Do you see even a weak clustering? Have you tried DAPC? 

Sorry I can't be more helpful 
Max

Massimiliano S. Tagliamonte
DVM, MSc, PhD
Postdoc Associate
Emerging Pathogens Institute
Department of Pathology
College of Medicine
University of Florida

________________________________________
From: adegenet-forum-bounces at r-forge.wu-wien.ac.at <adegenet-forum-bounces at r-forge.wu-wien.ac.at> on behalf of mkonop at wp.pl <mkonop at wp.pl>
Sent: Wednesday, April 18, 2018 11:21 AM
Cc: adegenet-forum at r-forge.wu-wien.ac.at
Subject: Re: [adegenet-forum] Coordinates and distances in sPCA

Dear Massimiliano,
Thanks for quick answer. The problem with UTM and my data is that my samples are in 3 or even 4 UTM zones. I did not find a way to transform such a big area to UTM coordinates.

Maciek

> Wiadomość napisana przez Tagliamonte,Massimiliano S <mstagliamonte at ufl.edu> w dniu 18.04.2018, o godz. 17:14:
>
> Dear Maciek,
>
> If I remember correctly, you need to use the UTM coordinate system. I do not have access to my personal computer right now, so you'll have to do some search to find the appropriate conversion programs or packages, it's been some time since I last did it. Feel free to write again if you need any more details.
>
> Regards,
> Max
>
> Massimiliano S. Tagliamonte
> DVM, MSc, PhD
> Postdoc Associate
> Emerging Pathogens Institute
> Department of Pathology
> College of Medicine
> University of Florida
>
> ________________________________________
> From: adegenet-forum-bounces at r-forge.wu-wien.ac.at <adegenet-forum-bounces at r-forge.wu-wien.ac.at> on behalf of Maciek <mkonop at wp.pl>
> Sent: Wednesday, April 18, 2018 11:10 AM
> To: adegenet-forum at r-forge.wu-wien.ac.at
> Subject: [adegenet-forum] Coordinates and distances in sPCA
>
> Dear All,
>
> I've searched tutorials and internet to find what coordinate system
> should be used in sPCA but found no information. I checked data from
> Rupica, but could not figure out what cooridinate system it is. When I
> used regular WGS84 coordinates the distances between points are
> expressed in strange units of approximatelly 78 km but are consistent
> along north/south and east/west distances (however I did not check them
> in detail).
>
> Where should I search for such information?
>
> Cheers,
>
> Maciek
>
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