Hi Nikos, Commands are as follows
*r.ros,* r.ros --overwrite model=fuel_model@demomapset moisture_1h=1hour_moisture@demomapset moisture_live=live_moisture@demomapset velocity=wind_speed@demomapset direction=wind_direction@demomapset slope=slope@demomapset aspect=aspect@demomapset elevation=elevation@demomapset base_ros=my_ros.base max_ros=my_ros.max direction_ros=my_ros.maxdir spotting_distance=my_ros.spotdist *r.spread,* r.spread --overwrite base_ros=my_ros.base@demomapset max_ros=my_ros.max@demomapset direction_ros=my_ros.maxdir@demomapset start=fire_origin@demomapset wind_speed=wind_speed@demomapset output=spread_time_observed *After entering; r.category spread_time_observed,* [image: 1.png] *After entering; r.report spread_time_observed units=c,p,* [image: Screenshot from 2018-10-15 21-40-46.png] Thank You Best Regards Kalindu Perera On Mon, 15 Oct 2018 at 20:30, Nikos Alexandris <n...@nikosalexandris.net> wrote: > Please post the exact command you have used (copy-and-paste). > > Then, what does > ``` > r.category spread_time_observed > ``` > > and what does > ``` > r.report spread_time_observed units=c,p > ``` > > return? > > * Kalindu Perera <kkc199...@gmail.com> [2018-10-15 16:01:38 +0530]: > > >Dear Nikos, > > > >We have used r.ros and r.spread commands for getting the wildfire > >simulation. > >After that, the output from the r.spread command is spread_time_observed > >layer(This is the output from the simulation) > >We use that layer as the input layer for the r.surf.area command. > > > >We got many area outputs from that command output and couldn't identify > >what area gives the area of the "burned" area > >* I have attached the output from running r.surf.area command as an > >attachment. > > > >** Another question how we can extract only the "burned" area from the > >spread_time_observed layer? > > > >Thanks a lot for the quick reply > >Looking forward to more knowledge > > > >Best Regards > >Kalindu Perera > > > > > >On Mon, 15 Oct 2018 at 15:07, Nikos Alexandris <n...@nikosalexandris.net> > >wrote: > > > >> * Kalindu Perera <kkc199...@gmail.com> [2018-10-15 13:28:15 +0530]: > >> > >> >Dear all, > >> > > >> >We are doing wildfire simulation in Grass GIS. We need to compare the > area > >> >of 2 wildfire spreads after wildfire simulation ran. We tried to > calculate > >> >the area of the spread using r.surf.area module. But we couldn't > identify > >> >which is the area of the simulation from areas given from that. Could > >> >anyone tell us how to get an area from spread like this? > >> > >> Dear Kalindu, > >> > >> please post exact commands you already tried. > >> > >> What are the simulation output maps? > >> Fitst, what does `r.category` and `r.report` return when used for > >> simulation > >> maps? > >> > >> Then, maybe you need to "extract", each time, the "burned" area, then > >> use `r.surf.area` on it? > >> > >> Nikos > >> > >> > >> > > > > -- > Nikos Alexandris | Remote Sensing & Geomatics > GPG Key Fingerprint 6F9D4506F3CA28380974D31A9053534B693C4FB3 >
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