<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1435619580995_5375">I ran this command on a completely NORMAL (but large) global .tiff with a few tiles missing - but nothing else suspicious - and after 40 minutes it returned a dud file with '181' being the only value.</div><div id="yui_3_16_0_1_1435619580995_5637"><br></div><div id="yui_3_16_0_1_1435619580995_5636">Has this ever happened to anyone before?</div><div id="yui_3_16_0_1_1435619580995_5634"><br></div><div dir="ltr" id="yui_3_16_0_1_1435619580995_5635">gdaldem hillshade -of GTiff infile.tif hillshd.tif<br></div><div class="" id="yui_3_16_0_1_1435619580995_5635"><br class=""></div></div></body></html>