[GRASS-user] help(r.walk and r.cost and ogr)

hello all, I’m developing a pywps geoprocess in calculating accessibility, I saw a command called r.walk and r.cost not how viable is to use my project as: composite, I would like to share their experiences with these commands, downside is that the input data are vector network “ogr” I recommend to process attributes to network with their raster, or that would be the most appropriate to make these calculations, I just need a basic procedure

thanks for your answers and suggestions

Ricardo Rodríguez
Univalle