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
> [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user > > Openness.png (109K) > <http://osgeo-org.1560.x6.nabble.com/attachment/5087322/0/Openness.png> at http://sil.uc.edu/downloads.html see 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: http://osgeo-org.1560.x6.nabble.com/Openness-Calculation-tp5087322p5087347.html Sent from the Grass - Users mailing list archive at Nabble.com. _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
