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    <div class="moz-cite-prefix">Hi Paolo,<br>
      <br>
      You can find a description of it here :<br>
<a class="moz-txt-link-freetext" href="http://www.3liz.com/blog/rldhont/index.php?post/2012/11/06/Spatial-operators-in-QGIS-expression">http://www.3liz.com/blog/rldhont/index.php?post/2012/11/06/Spatial-operators-in-QGIS-expression</a><br>
      <br>
      You can do this type of expression :<br>
      intersects( $geometry, geomFromWKT( 'LINESTRING(765145.88
      6274561.22, 776031.67 6284189.52)' ) )<br>
      <br>
      I made it for WFS QGIS-Server<br>
      <br>
      Regards,<br>
      René-Luc D'Hont<br>
      3Liz<br>
      <br>
      Le 16/10/2013 19:18, Andrea Peri a écrit :<br>
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    <blockquote
cite="mid:CABqTJk_vfM+aaivkWqdP1FqqHg0c165TeUy21+rKwSmrLQ3MrQ@mail.gmail.com"
      type="cite">
      <div dir="ltr">perhaps to have some conditional input value ?<br>
        <br>
      </div>
      <div class="gmail_extra"><br>
        <br>
        <div class="gmail_quote">2013/10/16 Paolo Cavallini <span
            dir="ltr"><<a moz-do-not-send="true"
              href="mailto:cavallini@faunalia.it" target="_blank">cavallini@faunalia.it</a>></span><br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">-----BEGIN
            PGP SIGNED MESSAGE-----<br>
            Hash: SHA1<br>
            <br>
            Hi all.<br>
            In the Field Calculator there are, among the expressions, a
            series of spatial<br>
            operators (touches, intersects, etc.), but I cannot figure
            out how to use them. They<br>
            make sense as operators across layers, but I do not see how
            to use them within the<br>
            same layer.<br>
            Any hint?<br>
            Thanks.<br>
            - --<br>
            Paolo Cavallini - Faunalia<br>
            <a moz-do-not-send="true" href="http://www.faunalia.eu"
              target="_blank">www.faunalia.eu</a><br>
            Full contact details at <a moz-do-not-send="true"
              href="http://www.faunalia.eu/pc" target="_blank">www.faunalia.eu/pc</a><br>
            Nuovi corsi QGIS e PostGIS: <a moz-do-not-send="true"
              href="http://www.faunalia.it/calendario" target="_blank">http://www.faunalia.it/calendario</a><br>
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iEYEARECAAYFAlJexz8ACgkQ/NedwLUzIr5foQCffSm0vvgN3PM4gSMBGQZZJiKP<br>
            qyoAoI/npwhCsqeVQzxQ4e0QIg1c9IFk<br>
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        </div>
        <br>
        <br clear="all">
        <br>
        -- <br>
        -----------------<br>
        Andrea Peri<br>
        . . . . . . . . . <br>
        qwerty àèìòù<br>
        -----------------<br>
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