<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px;">According to <a href="http://www.gdal.org/frmt_gtiff.html">http://www.gdal.org/frmt_gtiff.html</a> , for a .tif composed of stripes, rather than tiles, GeoTIFF defaults to setting the size of a strip to be 8K bytes. This default can be over ridden by using BLOCKYSIZE=n. When working with images > 200MB, 8K seems to be particularly small. On a computer with at least 2 GB RAM, is there any good reason not the set the size of the TIFF stripes to be 64 MB? Greg</span></font></div></body></html>