<div dir="ltr">> The number of pixels of the binary viewshed whose value is equal to 1 (i.e. the sum of all the values within the search radius) will represent the score of each point. Higher is the score, more visible from different places the point will be. It could be calculated with the SEXTANTE "Basic statistics" tool.<div>
<br></div><div>IF you have a really, really large raster, you can also gain some more rapid conversion by accomplishing the calculation for scoring by sorting according to other criteria ( elevation, curvature, etc.). One needs to be cautious though, such criteria can work in counterintuitive ways. For instance, using elevation if the raster is mostly a dome shaped terrain feature vs. a bowl shape like a crater.</div>
<div><br></div><div>Michael<br><div class="gmail_extra"><br></div></div></div>