Local Convex Hull Polygon LoCoH

[Kateřina Gašparova]

I have GPS data from collared animals. Each record includes the date, time, animal ID, longitude, latitude. The original dataset includes a GPS point of every hour, in some cases, there are several day-long gaps in data transmitting. I run KDE and it worked well.  For comparison, I need to estimate the home range by using Adaptive Local Convex Hull Polygon. I have been searching for a methods and I found only in R, which I cannot use. Is there some way how to calculate it in QGIS 2.18.12, I suppose that function Convex hull is for Minimum Convex Polygon (MCP).

Thank you,

Katerina

[cdma...@gisinecology.com]

HI Katrina,

Unfortunately, as far as I am aware, there are no options for generating
Adaptive Local Convex Hull Polygons in QGIS, or in other GIS software.

Can I ask what is preventing you from doing it in R? Is it just a matter
that you are not an R user? Or is it that you are having problems
transferring your data between QGIS and R so you can analyse it with the
tools available in R?

If t is either of the last two options, let me know as I'm currently
working on a workbook to help people learn how to use QGIS and R
together to run home range analyses like this, and I may be able to help
out with some advice on how best to do this (and without getting too
bogged down with having to learn R).

All the best,

Colin

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[Kateřina Gašparova]

Dear Colin,

thank you for your reply and sorry for my silence. A few days after your answer I was given help from my university. Now I have a script in R for AKDE home range estimation, which works very well. Still, I cannot work with R and your book would be a very valuable tool for me.

I will be happy to read it when you finish it!

Best regards,

Kateřina

čt 17. 10. 2019 v 13:02 odesílatel <cdma...@gisinecology.com> napsal:

To view this discussion on the web visit https://groups.google.com/d/msgid/gis-in-ecology-forum/9f6428a550a078229ff722d0fc5b946c%40gisinecology.com.

--

Ing. Kateřina Gašparová

Department of Animal Sciences and Food Processing
Faculty of Tropical AgriSciences
Czech University of Life Sciences Prague

www.ftz.czu.cz