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Cheers!<br>
<br>
<div class="moz-cite-prefix">On 2017-11-22 23:48 PM, Anna Petrášová
wrote:<br>
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cite="mid:CAE0EDEr9iar34-BojP=5_iZLcHoGPfJtno1b7d3YLqM=G59kRw@mail.gmail.com">
<pre wrap="">Yes, you are right, I fixed it, thank you.
Anna
On Wed, Nov 22, 2017 at 7:27 AM, Micha Silver <a class="moz-txt-link-rfc2396E" href="mailto:tsvibar@gmail.com"><tsvibar@gmail.com></a> wrote:
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<pre wrap="">I'm using r.sun to extract shadowed areas from a LIDAR derived DTM for some
date/hour combinations. (GRASS 7.2) According to the man page:
"A map of shadows can be extracted from the solar incidence angle map
(incidout). Areas with zero values are shadowed."
In my output incidout raster, there are never values of zero. The minimum
incident angles are quite small, but no zeroes. However the NULL pixels seem
to be exactly the shadowed areas. (I am comparing with ortho-photos taken at
those specific dates and hours). Am I mistaken, or should the documentation
be changed to "Areas with NULL values are shadowed".
Thanks
--
Micha Silver
Ben Gurion Univ.
Sde Boker, Remote Sensing Lab
cell: +972-523-665918
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<br>
<pre class="moz-signature" cols="72">--
Micha Silver
Ben Gurion Univ.
Sde Boker, Remote Sensing Lab
+972-523-665918</pre>
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