Frank,<div><br></div><div>Thanks for the response. I would like to take the overviews and use them to cache the imagery into a web service ... I am assuming i'd be able to use the overviews to cache. I'll look into gdalbuildvrt command. <br>
<br>Do GDAL mosaics allow you to mask tile boundaries at all? I'd like to remove bounding black pixels along the borders prior to buliding overviews.<br><br><br>Thanks <br>Jon.<br><br><div class="gmail_quote">On Sun, Feb 26, 2012 at 11:55 AM, Frank Warmerdam [via OSGeo.org] <span dir="ltr"><<a href="/user/SendEmail.jtp?type=node&node=4514777&i=0" target="_top" rel="nofollow" link="external">[hidden email]</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>
On 12-02-25 11:02 AM, jgamble wrote:
<br></div><div>> Does gdaladdo support mosaic datasets? If so, are there examples of how to
<br>> use gdaladdo with mosaic datasets?
<br><br></div><div>Jon,
<br><br>GDAL does not support ArcGIS virtual mosaic format.
<br><br>The gdaladdo utility can be used on conventional raster formats. It is
<br>also possible to build a GDAL virtual raster file which might be a mosaic
<br>of raster files and then build overviews on it. I believe gdalbuildvrt
<br>is normal utility used to build .vrt mosaics.
<br><br>However, whether this is suitable for your purposes will depend on
<br>what you want to use the result for. If you just want a freestanding
<br>overview image of a set of images then you would be better off just
<br>doing something like:
<br><br> gdal_merge.py -o mosaic.tif -ps 20 20 in*.tif
<br><br>Assuming you want a mosaic of all in*.tif files with the output overview
<br>mosaic with a 20m by 20m pixel size.
<br><br>Note that .vrt's and their corresponding overviews may be usable in
<br>ArcGIS (since it uses GDAL) but I am not certain and it will likely
<br>depend on the version.
<br><br>Best regards,
<br>--
<br>---------------------------------------+--------------------------------------
<br></div>I set the clouds in motion - turn up | Frank Warmerdam, <a href="http://user/SendEmail.jtp?type=node&node=4510600&i=0" rel="nofollow" link="external" target="_blank">[hidden email]</a>
<br><div>light and sound - activate the windows | <a href="http://home.gdal.org/warmerda" rel="nofollow" link="external" target="_blank">http://home.gdal.org/warmerda</a><br>and watch the world go round - Rush | Geospatial Software Developer
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