<div dir="ltr">Hi list,<div>I have seen a recent email on that list about filling empty tiles and SPARSE_OK creation option (titled "Geotiff FillEmptyTiles with no data value")</div><div>I would like to understand a little better how it works.</div><div><br></div><div>Suppose I have 2 isolated GeoTiff files of the same datatype, let's say one covering California and the other covering France.</div><div>I do a gdalbuildvrt to mosaic them together and then I convert the VRT to GeoTiff.</div><div>At which level the SPARSE_OK flag and void blocks management are taken into account?</div><div>I was "hoping" that using the SPARSE_OK=TRUE create option when translating VRT to GeoTiff would have resulted into having an output smaller with respect to an output generated without that creation option since there is a wide void area in the middle.</div><div>Why I get the same size in both cases? Shouldn't it avoid filling void blocks in the gap?</div><div>Is the VRT Driver iterating on all the tiles involved in the final bounding box so that it forces a write of each block even if there is no source dataset for that tile?</div><div><br></div><div>Please, let me know.</div><div>Best Regards,</div><div>Daniele</div><div> <br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><span style="font-size:12.8px">==</span><br></div><div dir="ltr"><span style="font-size:12.8px">GeoServer Professional Services from the experts! Visit</span><br style="font-size:12.8px"><a href="http://goo.gl/it488V" style="color:rgb(17,85,204);font-size:12.8px" target="_blank">http://goo.gl/it488V</a><span style="font-size:12.8px"> for more information.</span><br>
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<br>Ing. Daniele Romagnoli<br>Senior Software Engineer<br><br>GeoSolutions S.A.S.<br><span style="font-size:12.8px">Via di Montramito 3/A</span><br>55054 Massarosa (LU)<br>Italy<br>phone: +39 0584 962313<br>fax: +39 0584 1660272<br><br><a href="http://www.geo-solutions.it" target="_blank">http://www.geo-solutions.it</a><br><a href="http://twitter.com/geosolutions_it" target="_blank">http://twitter.com/geosolutions_it</a><br><br>-------------------------------------------------------<br><p><span lang="IT"><font size="1"><b>AVVERTENZE AI SENSI DEL D.Lgs. 196/2003</b></font></span></p><p><span lang="IT"><font size="1">Le
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