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      <title>IGES import advanced settings</title>
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      <div class="title_topic3" id="xps10_pagetitle">IGES import advanced settings</div>
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               <p class="para_td"><a class="links" href="javascript:void(0)" onclick="top.openFile('dataexchange/iges_settings.html');return(false);">Overview</a></p>
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               <p class="para_td">Options</p>
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               <p class="para_td"><a class="links" href="javascript:void(0)" onclick="top.openFile('dataexchange/how_do.html');return(false);">Related Topics</a></p>
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      </table><br><div class="title_division">Sew surfaces</div>
      <p class="para_division">IGES files generally contain surface data. If you want to work with solid models, you can use this option to have the IGES translator sew the surfaces as they are imported. The IGES translator will make four attempts to sew the surfaces into a solid. After each attempt, the surfaces that will not sew are removed from the sew operation (but still exist in the model). The sew operation is then reattempted. If a solid cannot be fully created, the surfaced that could be sewn are left sewn, but you will have to use the <b class="uiTerm">Sew</b> option in Modeling to explicitly sew the remaining surface. Most often surfaces do not successfully sew due to large gaps between the surfaces. The IGES translator is conservative with the tolerance it uses, since you can always increase the tolerances with the <b class="uiTerm">Sew</b> operation.
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      <p class="para_division">The default is not to <b class="uiTerm">Sew Surfaces</b>.
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      <div class="title_division">Surface trimming tolerance</div>
      <p class="para_division"><b class="uiTerm">Surface Trimming Tolerance</b> is the maximum tolerance applied to surface edges to close gaps between surfaces. The recommended value is the identical point resolution of the sending system if you know it. Otherwise you will have to use a value that represents an acceptable value for your downstream application. This can be quite loose for modeling or visualization, but you might want a slightly tighter value for manufacturing operations.
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      <p class="para_division">The default <b class="uiTerm">Surface Trimming Tolerance</b> is .001mm.
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      <div class="title_division">Geometry fix-up tolerance</div>
      <p class="para_division">The <b class="uiTerm">Geometry Fix&ndash;up Tolerance</b> is actually just a reference value. When importing data into NX the IGES will smooth surface and curve data to the extent necessary to make it acceptable to NX. The system will provide messages in the log file if the translator has to apply a tolerance greater than the <b class="uiTerm">Geometry Fix-up Tolerance</b> messages. If the tolerances used are less than this value, no messages generate.
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      <p class="para_division">The default <b class="uiTerm">Geometry Fix-up Tolerance</b> is set fairly conservatively at .0005mm.
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      <div class="title_division">Connect copious data</div>
      <p class="para_division"><b class="uiTerm">Copious Data</b> is arbitrary point data within an IGES file. The <b class="uiTerm">Linear Spline</b> option creates straight lines between the copious data points. The <b class="uiTerm">Smooth Spline</b> option creates a continuous spline using the point data as control point. Smooth splines do not necessarily (in fact rarely) go through the copious data points.
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      <p class="para_division">The default is to <b class="uiTerm">Connect Copious Data with Linear Splines</b>.
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      <div class="title_division">Map View-Dependent /View-Modified to Model object</div>
      <p class="para_division">Normally the IGES data that is marked as view&ndash;dependent or view&ndash;modified creates as similar objects in NX. However there are situations where you may want this data to appear in all views. If you do, you will need to create model objects within NX for the data.</p>
      <p class="para_division">The default is to not <b class="uiTerm">Map View-Dependent</b> / <b class="uiTerm">View-Modified to Model Objects</b>.
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