Dear list, I need to calculate a viewshed surface for multiple points (and have, in the end, a single surface of where any of those points can see). In fact this is to deal with the other way around: I want to know, in any position, if it is possible to see back to one of those points modeled. r.viewshed seems to do the job, but for a single point at a time.Is there any implementation doing this for multiple points, like a poit vector as input instead of a pair (x,y)? Thank!Best wishesBernardo
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