<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif;font-size:10pt"><div><span>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)</span></div><div><span></span> </div><div><span>r.geomorphons looks like just the ticket - time to experiment!</span></div><div><span></span> </div><div><span>Best wishes,</span></div><div><span>Rebecca</span></div><div><span></span> </div><div style="display: block;" class="yahoo_quoted"> <br> <br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif; font-size: 10pt;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif; font-size: 12pt;"> <div dir="ltr"> <font size="2" face="Arial"> On Monday, 4 November
2013, 21:01, Helmut Kudrnovsky <hellik@web.de> wrote:<br> </font> </div> <div class="y_msg_container">Rebecca Bennett wrote<br clear="none">> Dear GRASS users,<br clear="none">> <br clear="none">> I have recently been made aware of the positive and negative openness<br clear="none">> vizualisations (Yokoyama et al 2002<br clear="none">> <a href="http://www.asprs.org/a/publications/pers/2002journal/march/2002_mar_257-265.pdf" shape="rect" target="_blank">http://www.asprs.org/a/publications/pers/2002journal/march/2002_mar_257-265.pdf</a>)<br clear="none">> and would like to try to compute them in GRASS to help identify micro<br clear="none">> relief.<br clear="none">> <br clear="none">> Though I suspect that this has already been done, I can't find a heads up<br clear="none">> other than this paper (which claims to have creates the web service based<br clear="none">> on GRASS here<br
clear="none">> <a href="http://geobrain.laits.gmu.edu/grassweb/manuals/raster/openness.html" shape="rect" target="_blank">http://geobrain.laits.gmu.edu/grassweb/manuals/raster/openness.html</a>)<br clear="none">> <a href="http://www.lpi.usra.edu/science/stepinskiWebPage/pdfFiles/geoinformaticsConf2009.pdf" shape="rect" target="_blank">http://www.lpi.usra.edu/science/stepinskiWebPage/pdfFiles/geoinformaticsConf2009.pdf</a><br clear="none">> <br clear="none">> Just a note that although similar in it's aim of highlighting<br clear="none">> microtopography, this is not quite the same as the r.horizon calculation<br clear="none">> (image attached for clarification).<br clear="none">> <br clear="none">> All the best,<br clear="none">> Rebecca<br clear="none">> _______________________________________________<br clear="none">> grass-user mailing list<br clear="none"><br clear="none">> <a
href="mailto:grass-user@.osgeo" shape="rect" ymailto="mailto:grass-user@.osgeo">grass-user@.osgeo</a><br clear="none"><br clear="none">> <a href="http://lists.osgeo.org/mailman/listinfo/grass-user" shape="rect" target="_blank">http://lists.osgeo.org/mailman/listinfo/grass-user</a><br clear="none">> <br clear="none">> Openness.png (109K)<br clear="none">> <<a href="http://osgeo-org.1560.x6.nabble.com/attachment/5087322/0/Openness.png%3E" shape="rect" target="_blank">http://osgeo-org.1560.x6.nabble.com/attachment/5087322/0/Openness.png%3E</a><br clear="none"><br clear="none">at <a href="http://sil.uc.edu/downloads.html" shape="rect" target="_blank">http://sil.uc.edu/downloads.html</a>see <br clear="none"><br clear="none">T.F. Stepinski, and J. Jasiewicz (2011) Geomorphons - A New Approach to<br clear="none">Classification of Landforms, in: T. Hengl, I. S. Evans, J. P. Wilson, M.<br clear="none">Gould (Eds.), Geomorphometry 2011, pp.
109-112. paper. Watch a video of an<br clear="none">actual presentation of this paper at the Geomorphometry 2011 conference. <br clear="none"><br clear="none">there is a nice video that shows their work is based upon Yokoyama et al<div id="yqtfd97568" class="yqt8928742325"><br clear="none">2002.</div><br clear="none"><br clear="none"><br clear="none"><br clear="none">-----<br clear="none">best regards<br clear="none">Helmut<br clear="none">--<br clear="none">View this message in context: <a href="http://osgeo-org.1560.x6.nabble.com/Openness-Calculation-tp5087322p5087347.html" shape="rect" target="_blank">http://osgeo-org.1560.x6.nabble.com/Openness-Calculation-tp5087322p5087347.html</a><br clear="none">Sent from the Grass - Users mailing list archive at Nabble.com.<br clear="none">_______________________________________________<br clear="none">grass-user mailing list<br clear="none"><a href="mailto:grass-user@lists.osgeo.org" shape="rect"
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