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    <div class="moz-cite-prefix">12.07.2012 14:36, Paul Meems (Top-X)
      пишет:<br>
    </div>
    <blockquote
cite="mid:CAHNf2YTTzpAEri+2BoADe1Suo4jmvoWpGvcFUcx3rH+_R7Rjpg@mail.gmail.com"
      type="cite">Thanks Even,<br>
      <br>
      <a moz-do-not-send="true"
        href="http://www.gdal.org/gdalbuildvrt.html">http://www.gdal.org/gdalbuildvrt.html</a>
      does seems very interesting.<br>
      As I understand it, it will do the merging part (without actually
      merging).<br>
      <br>
      But it doesn't do the tiling part, right? Or is the vrt so
      optimized tiling is no longer necessary?<br>
      <br>
      Thanks,<br>
      <br>
      Paul
      <br>
      <br>
      <br>
      <div class="gmail_quote">2012/7/12 Even Rouault <span dir="ltr"><<a
            moz-do-not-send="true"
            href="mailto:even.rouault@mines-paris.org" target="_blank">even.rouault@mines-paris.org</a>></span><br>
        <blockquote class="gmail_quote" style="margin:0 0 0
          .8ex;border-left:1px #ccc solid;padding-left:1ex">
          Selon "Paul Meems (Top-X)" <<a moz-do-not-send="true"
            href="mailto:p.meems@topx-group.nl">p.meems@topx-group.nl</a>>:<br>
          <div>
            <div class="h5"><br>
              > Hi list,<br>
              ><br>
              > I have several aerial photos and I use MapWindow GIS
              to view them.<br>
              > MapWindow is already using GDAL v1.8<br>
              ><br>
              > Instead of loading each aerial photo as an individual
              layer I want to<br>
              > create a local tiles store of the photos.<br>
              > I can then just load the tiles I need based on the
              scale and view. This<br>
              > will most likely improve the performance.<br>
              ><br>
              > The process will be something like this:<br>
              > 1. Get the filenames of the photos<br>
              > 2. Merge them into one<br>
              > 3. Create tiles<br>
              > 4. Put the tiles in a SQLite database<br>
              ><br>
              > My first question: Is the above suggested process
              correct or should I do it<br>
              > differently?<br>
              > My second question: What GDAL functions should I look
              into to accomplish my<br>
              > process?<br>
              <br>
            </div>
          </div>
          You could try to make a VRT from all your photos. It will be
          seen as a single<br>
          GDAL dataset, and will take care of the burden of opening the
          underlying photos<br>
          when needed. You can use the gdalbuildvrt utility to create
          the VRT from the<br>
          photos.<br>
          <div class="im"><br>
            ><br>
            > Thanks,<br>
            ><br>
            > Paul Meems<br>
            > The Netherlands<br>
            ><br>
            <br>
            <br>
          </div>
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        </blockquote>
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    </blockquote>
    There is an interesting work connected aerial imagery: <a
      href="http://trac.osgeo.org/gdal/wiki/Correlator">http://trac.osgeo.org/gdal/wiki/Correlator</a><br>
    <a href="http://correlatorgsoc2012.blogspot.com/">http://correlatorgsoc2012.blogspot.com/</a><br>
    <br>
    Best regards,<br>
        Dmitry<br>
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