<div dir="ltr">Hi,<div><br></div>I'd like to generate multiple random surface with different spatial autocorrelation. Of course I can do that with multiple runs of r.random.surface (GRASS7) by setting different values for the distance parameter for each run (this works fine). In the manual I read that if "If multiple values are given [for the distance parameter?], each output map will have multiple filters, one for each set of distance, exponent, and weight values." Indeed, I can provide multiple names for the desired output maps, but if I want to use multiple values for the distance parameter only the first is considered. Maybe I understood the manual wrong and somebody can explain it.<div>
Here an example (e.g. for the NC dataset):</div><div><br></div><div>r.random.surface --overwrite output=r1,r2,r3 distance=50000.0,2.0,2000.0 seed=999 high=20000<br></div><div><br></div><div>There are multiple different maps generated but the spatial dependence of the maps seems the same.</div>
<div><br></div><div>Any ideas? Anyway, there is of course still the easy way of running r.random.surface in loops.</div><div><br></div><div>cheers,</div><div>Johannes</div></div>