<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">Fellow GRASSers - <DIV><BR class="khtml-block-placeholder"></DIV><DIV>I am using GRASS 6.3 cvs, the Kynge's build, and I have an issue using v.rast.stats on a raster of slope. Many (n>100) of my archaeological sites, which are all polygons, produced 9 columns of zeros for the slope stat calculations. I repeated the exercise, using different column names, and it repeated the results. </DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>The oddest part is that I successfully calculated elevation stats from a DEM raster using the same v.rast.stats command. The slope raster was produced directly from the DEM, so resolution, etc. are exactly the same. </DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>I investigated some of the polys that were missing slope information, and indeed, the raster is completely intact in the area of these polygons, with values other than zero, and the polygon itself is clean. </DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>In attempting to do the same calculations with my aspect raster, there were also many sites where the aspect calculation resulted in 0 (for both of these, even the 'n' field, number of cells, is 0). These sites were not always the same as the ones that had slope calculations of zeros!</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>I am running the stat calculations with slope again, after cleaning the vector file, but I still am not optimistic that this will help since my v.rast.stats calculations on elevation were successful where the slope ones were not.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Also, it takes about 7 hours to calculate the stats for my 893 polygons (16 meter grid resolution probably has something to do with it, but wanted to make sure this isn't a fixable thing). </DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>I tried searching the user list, but found nothing related to this problem with v.rast.stats.</DIV><DIV>Thanks all,</DIV><DIV>Brandon</DIV><DIV><DIV> <SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 11px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 11px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><DIV style="; font-size: 12px; "><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;">_______________________</SPAN></FONT></DIV><DIV style="; font-size: 12px; "><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;">Brandon M. Gabler</SPAN></FONT></DIV><DIV style="; font-size: 12px; "><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;">Doctoral Candidate</SPAN></FONT></DIV><DIV style="; font-size: 12px; "><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;">Department of Anthropology</SPAN></FONT></DIV><DIV style="; font-size: 12px; "><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;">University of Arizona</SPAN></FONT></DIV><DIV style="; font-size: 12px; "><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;">Tucson, AZ 85721</SPAN></FONT></DIV><DIV style="; font-size: 12px; "><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;">Phone: (520) 621-8455</SPAN></FONT></DIV><DIV style="; font-size: 12px; "><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;">Fax: (520) 621-2088</SPAN></FONT></DIV><DIV style="; font-size: 12px; "><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;"><A href="mailto:bgabler@email.arizona.edu">bgabler@email.arizona.edu</A></SPAN></FONT></DIV><DIV style="; font-size: 12px; "><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;"><BR class="khtml-block-placeholder"></SPAN></FONT></DIV><DIV style="; font-size: 12px; "><SPAN class="Apple-style-span"><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;">"Who? When? Whither? are the questions with which the archaeologist challenges the refuse heaps, scattered potsherds, and broken shafts, to tell of the builders who came and lived and went their way into the templed past." -- Edgar Lee Hewett, in</SPAN></FONT><SPAN class="Apple-converted-space"><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;"> </SPAN></FONT></SPAN><I style="font-style: italic; ; font-size: 12px; "><SPAN class="Apple-style-span" style="font-style: italic; ; font-size: 12px; "><SPAN class="Apple-style-span" style="font-style: italic; ; font-size: 12px; "><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;; font-style: italic; "><SPAN class="Apple-style-span" style="font-style: italic; ">Pajarito Plateau and its Ancient People</SPAN></SPAN></FONT></SPAN></SPAN></I><FONT class="Apple-style-span" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;">, 1938</SPAN></FONT></SPAN></DIV><FONT class="Apple-style-span" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;"><BR class="Apple-interchange-newline"></SPAN></FONT></SPAN></SPAN></SPAN></SPAN></SPAN> </DIV><BR></DIV></BODY></HTML>