<div dir="ltr">yes, of course!<br><div>GM</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Il giorno gio 25 giu 2020 alle ore 09:51 Laura Poggio <<a href="mailto:laura.poggio@gmail.com">laura.poggio@gmail.com</a>> ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Hi Gianluca,<div>thanks for the explanation. It was very useful. Thanks to your explanations I managed to modify the DAT file to reproduce the <a href="https://www.nrcs.usda.gov/Internet/FSE_MEDIA/nrcs142p2_050619.jpg" target="_blank">USDA-NRCS texture triangle</a>. We are doing some final checks. After that, if you are interested, I can share the DAT file.</div><div><br></div><div>Thanks a lot!<br>Laura</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, 12 Jun 2020 at 22:27, Gianluca Massei <<a href="mailto:agr.gianluca.massei@gmail.com" target="_blank">agr.gianluca.massei@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">*.dat files are derived from TALCPP <span style="color:rgb(51,51,51);font-family:"Open Sans",sans-serif;font-size:17.6px">(</span>
<a href="https://www.tandfonline.com/doi/abs/10.1081/CSS-120017410" target="_blank">https://www.tandfonline.com/doi/abs/10.1081/CSS-120017410</a>). The values describe polygons coordinates for different class inside the texture triangle. In r.soils.texture is implemented an algorithm to check if a single point is inside or outside a texture polygon. If the point is inside it is labeled with the correspondent texture code and used to build a texture map.<div>By</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Il giorno ven 12 giu 2020 alle ore 08:10 Laura Poggio <<a href="mailto:laura.poggio@gmail.com" target="_blank">laura.poggio@gmail.com</a>> ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Dear all,<div>I am looking at the <a href="https://svn.osgeo.org/grass/grass-addons/grass7/raster/r.soils.texture/scheme/USDA.dat" target="_blank">DAT file</a> for USDA soil texture classification for the <a href="http://r.soil.texture" target="_blank">r.soil.texture</a> addon.</div><div>I have a couple of questions.</div><div><br></div><div>1) the class silt-loam appears twice (number 8 and 12). Is this intentional and needed for the calculations?</div><div><br></div><div>2) Could you please explain the structure of the DAT file? As example</div><div>1 <br>6 <br>0 0 20 45 45 0<br>100 60 40 40 55 100<br></div><div><br></div><div>First line: I think is the class value as written in the pixel.</div><div>Second line: not sure</div><div>Following two lines: I think they are somehow the limits of sand, silt and clay. However I can not really understand in which order.</div><div><br></div><div>Thank you very much in advance</div><div>Laura</div><div><br></div></div>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature">Dott. Gianluca Massei, PhD<br></div>