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    Many thanks for responding. I have downloaded a GTOPO30 tile in
    geotiff format but am perplexed as to how to proceed. Adding it to a
    QGIS project produces a black and white image. It seems I have to
    process the image somehow to make it useful visually - could anybody
    point me in the direction of of to do this.<br>
    <br>
    With grateful thanks<br>
    <br>
    <div class="moz-cite-prefix">On 05/05/15 19:36, Nicolas Cadieux
      wrote:<br>
    </div>
    <blockquote
      cite="mid:972ef021-ad61-4f7d-981e-9b113438f16b@email.android.com"
      type="cite">
      <p dir="ltr">You could use a Dem with a shades model.  Look for
        srtm, aster Gdem or ETOPO1 or GTOPO30. The last is probably the
        best choice at that scale.</p>
      <p dir="ltr">Nicolas Cadieux M.Sc.<br>
        Les Entreprises Archéotec inc. <br>
        8548, rue Saint-Denis Montréal H2P 2H2<br>
        Téléphone: 514.381.5112  Fax: 514.381.4995<br>
        <a class="moz-txt-link-abbreviated" href="http://www.archeotec.ca">www.archeotec.ca</a></p>
      <div class="gmail_quote">On May 5, 2015 14:01, "Martin Pescador
        [via OSGeo.org] " <<a moz-do-not-send="true"
          href="/user/SendEmail.jtp?type=node&node=5204254&i=0"
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        wrote:<br type="attribution">
        <blockquote style="border-left:2px solid #CCCCCC;padding:0 1em"
          class="quote"> I wish to prepare a simple small-scale map of
          part of Mongolia, to <br>
          illustrate the location of some study sites. To provide some
          background <br>
          context I would like to use a raster image such as that
          provided by <br>
          provided by, or from, satellite data.  Something similar to
          the Natural <br>
          Earth raster layers would be fine. Unfortunately, the Natural
          Earth data <br>
          at 1:10 million is too coarse for my purposes as my map will
          be c. 1:1 <br>
          million.
          <br>
          <br>
          I have tried using the free Landsat data available from USGS
          but I am <br>
          not familiar with the myriad of possibilities available or how
          to turn a <br>
          downloaded image into something I can use. Could anybody more
          <br>
          knowledgeable than myself point me in the direction of any
          useful raster <br>
          geotiff images that could fit my purpose, or to instructions
          of how to <br>
          turn landsat images into something I can use?
          <br>
          <br>
          With grateful thanks! Martino
          <br>
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