[GRASS-user] Openness Calculation

[Thomas Adams]

Rebecca,

The module I was thinking of is r.param.scale; where are you finding
r.geomorphons?
I can't find it.

Tom


On Tuesday, November 5, 2013, Rebecca Bennett wrote:

> Thank you everyone for your suggestions and links to further papers (and
> apologies for the multiple original posts - I think my computer must have
> been having a moment)
>
> r.geomorphons looks like just the ticket - time to experiment!
>
> Best wishes,
> Rebecca
>
>
>
>   On Monday, 4 November 2013, 21:01, Helmut Kudrnovsky <hellik at web.de<javascript:_e({}, 'cvml', 'hellik at web.de');>>
> wrote:
>  Rebecca Bennett wrote
> > Dear GRASS users,
> >
> > I have recently been made aware of the positive and negative openness
> > vizualisations (Yokoyama et al 2002
> >
> http://www.asprs.org/a/publications/pers/2002journal/march/2002_mar_257-265.pdf
> )
> > and would like to try to compute them in GRASS to help identify micro
> > relief.
> >
> > Though I suspect that this has already been done, I can't find a heads up
> > other than this paper (which claims to have creates the web service based
> > on GRASS here
> > http://geobrain.laits.gmu.edu/grassweb/manuals/raster/openness.html)
> >
> http://www.lpi.usra.edu/science/stepinskiWebPage/pdfFiles/geoinformaticsConf2009.pdf
> >
> > Just a note that although similar in it's aim of highlighting
> > microtopography, this is not quite the same as the r.horizon calculation
> > (image attached for clarification).
> >
> > All the best,
> > Rebecca
> > _______________________________________________
> > grass-user mailing list
>
> > grass-user at .osgeo <javascript:_e({}, 'cvml', 'grass-user at .osgeo');>
>
> > http://lists.osgeo.org/mailman/listinfo/grass-user
> >
> > Openness.png (109K)
> > <
> http://osgeo-org.1560.x6.nabble.com/attachment/5087322/0/Openness.png%3E
>
> at http://sil.uc.edu/downloads.htmlsee
>
> T.F. Stepinski, and J. Jasiewicz (2011) Geomorphons - A New Approach to
> Classification of Landforms, in: T. Hengl, I. S. Evans, J. P. Wilson, M.
> Gould (Eds.), Geomorphometry 2011, pp. 109-112. paper. Watch a video of an
> actual presentation of this paper at the Geomorphometry 2011 conference.
>
> there is a nice video that shows their work is based upon Yokoyama et al
>
> 2002.
>
>
>
>
> -----
> best regards
> Helmut
> --
> View this message in context:
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> Sent from the Grass - Users mailing list archive at Nabble.com.
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-- 
Thomas E Adams, III
718 McBurney Drive
Lebanon, OH 45036

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