Hi<div>Thanks Martin but It's not working. With the following command </div><div><div>v.rast.stats -c -e --verbose vector=seg1@PERMANENT raster=SEG.1@PERMANENT colprefix=stat</div></div><div><br></div><div>I'm getting this error:</div>
<div><div>Adding columns ' stat_n INTEGER, stat_min DOUBLE PRECISION, stat_max DOUBLE PRECISION, stat_range DOUBLE PRECISION, stat_mean DOUBLE PRECISION, stat_stdde DOUBLE PRECISION, stat_varia DOUBLE PRECISION, stat_cf_va DOUBLE PRECISION, stat_sum DOUBLE PRECISION, stat_first DOUBLE PRECISION, stat_media DOUBLE PRECISION, stat_third DOUBLE PRECISION, stat_per90 DOUBLE PRECISION'</div>
<div>C:/GRASS6/scripts/v.rast.stats: line 268: v.db.addcol:</div><div>command not found</div><div>ERROR: Cannot continue (problem adding columns).</div></div><div><br></div><div>Why am I getting this? Or, what I have to do before I run v.rast.stat?</div>
<div>Thanks</div><div>Kat</div><div><br></div><div><br></div><div><br><div class="gmail_quote">2010/8/5 Martin Wegmann <span dir="ltr"><<a href="mailto:martin.wegmann@uni-wuerzburg.de">martin.wegmann@uni-wuerzburg.de</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Hello,<br>
<br>
I think v.rast.stats is what you are looking for<br>
<br>
<a href="http://grass.itc.it/gdp/html_grass64/v.rast.stats.html" target="_blank">http://grass.itc.it/gdp/html_grass64/v.rast.stats.html</a><br>
<br>
regards, Martin<br>
<div><div></div><div class="h5"><br>
On Donnerstag, 5. August 2010 18:25:37 katrin eggert wrote:<br>
> Hello<br>
><br>
> I have polygon layer which divides my image into several areas all<br>
> contiguous. With the same size, I have a raster image. I want to:<br>
><br>
> - calculate the most frequent value of the raster inside each polygon;<br>
><br>
> - the maximum and minimum value inside each polygon<br>
><br>
> How can this be done in GRASS?<br>
><br>
><br>
> Thanks<br>
><br>
> Katrin<br>
<br>
<br>
</div></div></blockquote></div><br></div>