Re: [GRASS-user] Display of Terrain Perameter Maps

2010-03-02 Thread Dylan Beaudette
On Tuesday 02 March 2010, Rich Shepard wrote: > On Tue, 2 Mar 2010, Dylan Beaudette wrote: > > I have found that with a certain amount of smoothing (r.param.scale , > > r.neighbors) and the right color scheme (r.colors [-e]) one can generate > > pretty nice looking maps that display overall trends.

Re: [GRASS-user] Display of Terrain Perameter Maps

2010-03-02 Thread Rich Shepard
On Tue, 2 Mar 2010, Dylan Beaudette wrote: I have found that with a certain amount of smoothing (r.param.scale , r.neighbors) and the right color scheme (r.colors [-e]) one can generate pretty nice looking maps that display overall trends. Dylan, I used r.param.scale extensively; will learn

Re: [GRASS-user] Display of Terrain Perameter Maps

2010-03-02 Thread Dylan Beaudette
On Monday 01 March 2010, Rich Shepard wrote: >The output maps from r.slope.aspect. r.resamp.rst, and even r.topidx the > output maps have values for each cell rather than trends. This is very > difficult to interpret by non-technical viewers. > >I've seen maps of slopes, profile and planar

Re: [GRASS-user] Display of Terrain Perameter Maps

2010-03-02 Thread Rich Shepard
On Tue, 2 Mar 2010, Glynn Clements wrote: Filter the input data with r.neighbors[1], r.mfilter, etc. [1] I wouldn't use method=mode if you're going to calculate derivatives. I'm not so sure about method=median either. I appreciate learning of options that did not strike me as appropriate wh

Re: [GRASS-user] Display of Terrain Perameter Maps

2010-03-02 Thread Glynn Clements
Rich Shepard wrote: >The output maps from r.slope.aspect. r.resamp.rst, and even r.topidx the > output maps have values for each cell rather than trends. This is very > difficult to interpret by non-technical viewers. > >I've seen maps of slopes, profile and planar curvature, and topogra

Re: [GRASS-user] Display of Terrain Perameter Maps

2010-03-02 Thread Hamish
Rich: > Is there a way to get smoother output maps run eg 'r.neighbors method=mode' to smooth/denoise maps 'r.param.scale param=feature' also offers a simplified version. both modules allow you to change the search window size. the bigger the window, the more smoothing. Hamish