<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>Tiff files are composed of either one or more tiles, or one or more stripes. No single tile or stripe can be larger than 2 GB. The original Tiff standard further required that a .tif file not be larger than 4 GB. The BigTiff standard does away with this 4 GB .tif file limit.</div><div>GDAL supports BigTiff with 4 create options <span class="Apple-style-span" style="font-family: Times; "><b>BIGTIFF=YES/NO/IF_NEEDED/IF_SAFER</b></span></div><div><a href="http://www.gdal.org/frmt_gtiff.html">http://www.gdal.org/frmt_gtiff.html</a></div><div><br></div><div>I have successfully created tiled 150 GB .tif files in 2 hours with gdal_translate (and gdal_merge.py) like this</div><div><font class="Apple-style-span" face="Courier">gdal_translate -of GTiff -ot Byte </font><span class="Apple-style-span" style="font-family: Courier; ">--config GDAL_CACHEMAX 1000 \</span></div><div><div><font class="Apple-style-span" face="Courier">-co TILED=YES -co BLOCKXSIZE=1024 -co BLOCKYSIZE=1024 \</font></div><div><font class="Apple-style-span" face="Courier">-co BIGTIFF=YES in.tif out.tif</font></div></div><div><br></div><div>GDAL indicates it progress like this</div><div><font class="Apple-style-span" face="Courier">0...10...20...30...40...50...60...70...80...90...100 - done.</font></div><div>Greg</div><br><div><div>On Jul 14, 2010, at 10:38 AM, Pasta Bolognese wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Hi Tejas ,<br><br>where did you get that 30GB Tiff file from ? I tough that the maximum<br>size for a Tiff was 4GB...<br><br><br><br>On Wed, Jul 14, 2010 at 3:33 PM, Tejas Gajera <<a href="mailto:tejas.gajera@gmail.com">tejas.gajera@gmail.com</a>> wrote:<br><blockquote type="cite"><br></blockquote><blockquote type="cite">Hi,<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">I have a Tiff image of around 30GB, and I want to create tiles using<br></blockquote><blockquote type="cite">GDAL2Tiles command line utility. If anyone have used GDAL2Tiles command<br></blockquote><blockquote type="cite">utility, please let me know how long it takes to generate all tiles?<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">I have started tilling process two days ago and its still running (under<br></blockquote><blockquote type="cite">process). I have no idea how long it going to take.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Please throw anything you know about GDAL2Tiles.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Thanks in advance.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Best,<br></blockquote><blockquote type="cite">Tejas Gajera<br></blockquote><blockquote type="cite">--<br></blockquote><blockquote type="cite">View this message in context: <a href="http://osgeo-org.1803224.n2.nabble.com/GDAL2Tiles-tp5292819p5292819.html">http://osgeo-org.1803224.n2.nabble.com/GDAL2Tiles-tp5292819p5292819.html</a><br></blockquote><blockquote type="cite">Sent from the GDAL - Dev mailing list archive at <a href="http://Nabble.com">Nabble.com</a>.<br></blockquote></div></blockquote></div><br></body></html>