Hi All,<div><br></div><div>I have some troubles running the Wildfire suite in grass. In particular, when i run r.spread I get the following error message:</div><div><br></div><div>[...]</div><div><div>WARNING: can't start from a BARRIER at cell (416,305), request ignored</div>
<div>WARNING: can't start from a BARRIER at cell (417,305), request ignored</div><div>WARNING: can't start from a BARRIER at cell (418,305), request ignored</div><div>[...]</div><div><br></div><div>I checked the input and this is due to the fact that r.ros produces a r.ros.base map which is all 0 and null.</div>
<div><br></div><div><div><a href="http://r.info">r.info</a> map=r_ros0.base</div><div> +----------------------------------------------------------------------------+</div><div> | Layer: r_ros0.base Date: Tue Aug 28 13:58:37 2012 |</div>
<div> | Mapset: PERMANENT Login of Creator: leomarg |</div><div> | Location: Europe |</div><div> | DataBase: /home/leomarg/grassdata |</div>
<div> | Title: ( r_ros0.base ) |</div><div> | Timestamp: none |</div><div> |----------------------------------------------------------------------------|</div>
<div> | |</div><div> | Type of Map: raster Number of Categories: 0 |</div><div> | Data Type: CELL |</div>
<div> | Rows: 744 |</div><div> | Columns: 889 |</div><div> | Total Cells: 661416 |</div>
<div> | Projection: Lambert Azimuthal Equal Area |</div><div> | N: 1903000 S: 1828600 Res: 100 |</div><div> | E: 3433100 W: 3344200 Res: 100 |</div>
<div> | Range of data: min = 0 max = 0 |</div><div> | |</div><div> | Data Description: |</div>
<div> | generated by r.ros |</div><div> | |</div><div> | |</div>
<div> +----------------------------------------------------------------------------+</div></div><div><br></div><div>So I checked the input of r.ros but i'm puzzled because everything looks good to me, I can't see any obvious error. In the manual I read:</div>
<div><br></div><div>3. The output units for the base and maximum ROSes are in cm/minute
rather than ft/minute, which is due to that a possible zero ft/minute base
ROS value and a positive integer ft/minute maximum ROS would result in
calculation failure in the r.spread program. </div><div><br></div><div>So if I understand correctly, this can be due to a possible unit mismatch. I give the velocity of wind in feet/minute and the direction in degrees, as required by the manual.</div>
<div>Where am I wrong?</div><div><br></div><div>Thanks.</div><div><br></div><div>madi</div><div><br></div><div><br></div><div><br></div>-- <br>Dr. Margherita Di Leo<br>
</div>