Probably you changed resolution of the rasrter itself before runing r.aspect.slope. <br><br>Has Maris said, try to first run the module with DEM native resolution, and then, if you need a better resolution, set it in yout region and then run r.resample.<br>
<br>André <br><br><div class="gmail_quote">2012/3/13 Maris Nartiss <span dir="ltr"><<a href="mailto:maris.gis@gmail.com">maris.gis@gmail.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hello,<br>
are You certain that it's not just a problem with data?<br>
<br>
Have You run Your analysis at DEM native resolution? Try to g.region<br>
rast=MyDEM before calculating aspect.<br>
Also how reprojection was done?<br>
<br>
Maris.<br>
<br>
2012/3/12 leonidas <<a href="mailto:leonidas_liakos@yahoo.gr">leonidas_liakos@yahoo.gr</a>>:<br>
<div><div></div><div class="h5">> I run r.slope.aspect on Aster DEM (reproject in greek grid). But I get some<br>
> strange results (like fishnet).<br>
> Here is a screenshot of Aspect :<br>
> <a href="http://www.geographer.gr/downloads/aspect.png" target="_blank">http://www.geographer.gr/downloads/aspect.png</a><br>
> <a href="http://www.geographer.gr/downloads/aspect.png" target="_blank">http://www.geographer.gr/downloads/aspect.png</a><br>
><br>
><br>
> --<br>
> View this message in context: <a href="http://osgeo-org.1560.n6.nabble.com/Strange-r-slope-aspect-output-of-Aster-dem-tp4571755p4571755.html" target="_blank">http://osgeo-org.1560.n6.nabble.com/Strange-r-slope-aspect-output-of-Aster-dem-tp4571755p4571755.html</a><br>
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