Gorilla Nesting Sites
Locations of nesting sites of gorillas, and associated covariates, in a National Park in Cameroon.
These data come from a study of gorillas in the Kagwene Gorilla Sanctuary, Cameroon, by the Wildlife Conservation Society Takamanda-Mone Landscape Project (WCS-TMLP). A detailed description and analysis of the data is reported in Funwi-Gabga and Mateu (2012).
gorillas is a marked point pattern
(object of class
giving the spatial locations of 647 nesting sites of gorilla groups
observed in the sanctuary over time.
Locations are given as UTM (Zone 32N) coordinates in metres.
The observation window is the boundary of the sanctuary, represented
as a polygon. Marks attached to the points are:
[object Object],[object Object],[object Object]
Note that the data contain duplicated points (two points at the
same location). To determine which points are duplicates,
To remove the duplication, use
The accompanying dataset
spatial covariate information. It is a named list containing
seven pixel images (objects of class
"im") giving the values of
seven covariates over the study region. It also belongs
to the class
"listof" so that it can be plotted.
The component images are:
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
For further information see Funwi-Gabga and Mateu (2012).
gorillas is a marked point pattern (object
"ppp") representing nest site locations.
gorillas.extra is a named list of 7 pixel images (objects of
"im") containing spatial covariates.
It also belongs to the class
All spatial coordinates are in metres.
The coordinate reference system is
For demonstration and training purposes,
the raw data file for the
vegetation covariate is
also provided in the
vegetation.asc in the folder
system.file to obtain the file path:
This is a text file in the simple ASCII file format of the geospatial
GDAL. The file can be read by the function
readGDAL in the
Field data collector: Wildlife Conservation Society Takamanda-Mone Landscape Project (WCS-TMLP). Please acknowledge WCS-TMLP in any use of these data.
Data kindly provided by Funwi-Gabga Neba, Data Coordinator of A.P.E.S. Database Project, Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany.
The collaboration of Prof Jorge Mateu, Universitat Jaume I, Castellon, Spain is gratefully acknowledged.
Funwi-Gabga, N. (2008) A pastoralist survey and fire impact assessment in the Kagwene Gorilla Sanctuary, Cameroon. M.Sc. thesis, Geology and Environmental Science, University of Buea, Cameroon.
Funwi-Gabga, N. and Mateu, J. (2012) Understanding the nesting spatial behaviour of gorillas in the Kagwene Sanctuary, Cameroon. Stochastic Environmental Research and Risk Assessment 26 (6), 793--811.
summary(gorillas) plot(gorillas) plot(gorillas.extra)