Some JGrass commands

Before using JGrass commands you have to set the active region that is the portion of the world in which JGrass makes raster elaborations. Note that visualization is more or less independent from active region, calculations are stricktly related to it.

To kown ho to set the active region in JGrass have a lood at the moovidas blog.

Here some JGrass commands to write in the console environment. Thanks to Erica and Andreas that gave them to me. I didn't test all of them but pretty sure they runs well.

h.netnumbering

This command allows you to enumerate the stream network channels and to extract the related basins. The network will be divided in subpieces which start and end at the confluences. To dived the network also in some other interesting points you have to add a shapefile of node point.

1. first option is the command in the basic mode: Usage mode 0: h.netnumbering --mode 0 --igrass-flow flow --igrass-net net --ograss-netnumber netnumber --ograss-basin basin
2. second option is dividing the network in subpieces which have an area less than the threshold fixed on the tca: Usage mode 1: h.netnumbering --mode 1 --thtca value --igrass-flow flow --igrass-net net --igrass-tca tca --ograss-netnumber netnumber--ograss-basin basin
3. third option is dividing the network in some interesting points taken from a shapefile: Usage mode 2: h.netnumbering --mode 2 --igrass-flow flow --igrass-net net --ishapefile-pointshape "filepath" -ograss-netnumber netnumber--ograss-basin basin
4. fourth method: mixed method between second and third (tca threshold and point shapefile): Usage mode 3: h.netnumbering --mode 3 --thtca value --igrass-flow flow --igrass-net net --igrass-tca tca ishapefile-pointshape "filepath" --ograss-netnumber netnumber--ograss-basin basin