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GRASS 7 is still in a beta release stage. The Kyngchaos.com package is a stable release of QGIS, which does not yet include GRASS 7 internally. You can get a copy using the Homebrew package manager and the OSGeo4Mac tap: Install Xcode, Xcode Command Line Tools and Homebrew Then, in Terminal run: brew install osgeo/osgeo4mac/grass-70 (if your ...


You can use QGIS for this analysis but do not confuse line of sight calculations with viewshed analysis. They are related but r.los returns a raster whose values are null for not-visible or the vertical angle required by the view to see the location. The module r.viewshed on the other hand returns a raster that simply marks a cell as visible or not (1 or ...

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