the folder to which the downloaded data set will be copied
Value
The function will have as a side effect that additional example data is
downloaded from Vienna University of Techology. This will for the default
case replace the existing example data-set in the rtop package. Alternatively
the user can specify a separate directory for the data set.
References
Skoien J. O., R. Merz, and G. Bloschl. Top-kriging - geostatistics on stream networks.
Hydrology and Earth System Sciences, 10:277-287, 2006.
Skoien, J. O., Bloschl, G., Laaha, G., Pebesma, E., Parajka, J., Viglione, A., 2014. Rtop: An R package for interpolation of data with a variable spatial support, with an example from river networks. Computers & Geosciences, 67.