[gdal-dev] mapping of shadows casted by other slopes

[Newcomb, Doug]

Kenlo,
Suggest you look at  GRASS GIS r.sun ,
https://grass.osgeo.org/grass72/manuals/r.sun.html.

Doug

On Tue, May 16, 2017 at 3:16 AM, NASAHARA Kenlo <24dakenlo at gmail.com> wrote:

> Dear GDAL people:
>
> Using DSM, I want a "shadow map" not only by the slope
> itself but also by the other slopes. I mean, if a tall and
> steep peak exists, and if it is illuminated by the sun from
> near the horizon, the shadow of the peak falls on a wide
> area of the foot of the mountain. Such shadow is normally
> not estimated by a simple "hillsahde" algorithm, which
> includes the "gdaldem" command. I want to map such
> shadows as well as the normal "hillshade" shadows.
>
> If you know a library or command to help it, please let
> me know!!
>
> --
> Kenlo Nishida Nasahara
> Faculty of Life and Environmental Sciences
> University of Tsukuba, Japan 305-8572
> 24dakenlo at gmail.com
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-- 
Doug Newcomb
USFWS
551F Pylon Dr
Raleigh, NC
919-856-4520 ext. 14 doug_newcomb at fws.gov
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