This program was developed by:

Ivan Marchesini
Research Institute for Geo-Hydrological Protection
via Madonna Alta, 126 - 06128 - Perugia, Italy
ivan.marchesini@irpi.cnr.it

This program is free software under the GNU General Public
License (>=v2). Read the file COPYING that comes with GRASS
for details.

It was designed and tested for use under Linux and GRASS GIS [v7.0].

Please make sure that the r.survey.py file is executable before
attempting to use it. If not, grant execution privileges to the
file, i.e. run:

chmod +x r.survey.py

The software should be moved into the scripts folder of the GRASS
GIS installation, typically /usr/lib/grass[v7.0]/scripts.

To know details about the input parameters, please call the help flag
running the following command within a GRASS GIS shell:

r.survey.py --h

if the software was not moved to the GRASS GIS script folder, it must
be called with

./r.survey.py

from within the folder in which the file is located. The input parameters
list is the following (all of them are required):

- points : name of input (vector) points map
- dem    : name of input (raster) DEM map
- output : name of output (raster) map
- maxdist: max visibility distance, in meters. Default: 1000 m
