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<div dir="ltr" data-setdir="false">Hi Stefan,</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Sure, that makes all sense! I am not used to DEM-realted indices, but I could have just thought a little...</div><div dir="ltr" data-setdir="false">Thanks a lot!</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">B<br></div><div><br></div>
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Em quinta-feira, 8 de outubro de 2020 12:50:35 GMT+2, Stefan Blumentrath <stefan.blumentrath@nina.no> escreveu:
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<p class="yiv0189279323MsoNormal"><span style="" lang="EN-US">Hi Brenado,</span></p>
<p class="yiv0189279323MsoNormal"><span style="" lang="EN-US"> </span></p>
<p class="yiv0189279323MsoNormal"><span style="" lang="EN-US">TPI is rather simple and can be computed with r.neighbors + r.mapcalc:</span></p>
<p class="yiv0189279323MsoNormal"><span style="" lang="EN-US"> </span></p>
<p class="yiv0189279323MsoNormal"><span style="" lang="EN-US">r.neighbors -c input=dem output=dem_avg_9 size=9</span></p>
<p class="yiv0189279323MsoNormal"><span style="">r.mapcalc expression=”TPI_9=dem-dem_avg_9”</span></p>
<p class="yiv0189279323MsoNormal"><span style="">g.remove -f type=raster name=dem_avg_9</span></p>
<p class="yiv0189279323MsoNormal"><span style=""> </span></p>
<p class="yiv0189279323MsoNormal"><span style="">Cheers</span></p>
<p class="yiv0189279323MsoNormal"><span style="">Stefan</span></p>
<p class="yiv0189279323MsoNormal"><span style=""> </span></p>
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<p class="yiv0189279323MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> grass-user <grass-user-bounces@lists.osgeo.org>
<b>On Behalf Of </b>Bernardo Santos<br clear="none">
<b>Sent:</b> torsdag 8. oktober 2020 12:35<br clear="none">
<b>To:</b> GRASS User List <grass-user@lists.osgeo.org><br clear="none">
<b>Subject:</b> [GRASS-user] TPI (terrain position index) in GRASS GIS</span></p>
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<p class="yiv0189279323MsoNormal"><span style="font-size:12.0pt;font-family:sans-serif;">Hi everyone,</span></p>
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<p class="yiv0189279323MsoNormal"><span style="font-size:12.0pt;font-family:sans-serif;"> </span></p>
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<p class="yiv0189279323MsoNormal"><span style="font-size:12.0pt;font-family:sans-serif;">Do any of you know if we can calculate TPI (terrain position index) in GRASS GIS?</span></p>
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<p class="yiv0189279323MsoNormal"><span style="font-size:12.0pt;font-family:sans-serif;">Or should we go for other tools such as SAGA GIS?</span></p>
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<p class="yiv0189279323MsoNormal"><span style="font-size:12.0pt;font-family:sans-serif;"> </span></p>
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<p class="yiv0189279323MsoNormal"><span style="font-size:12.0pt;font-family:sans-serif;">Best wishes,</span></p>
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<p class="yiv0189279323MsoNormal"><span style="font-size:12.0pt;font-family:sans-serif;">Bernardo Niebuhr</span></p>
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