<html><head></head><body bgcolor="#FFFFFF"><div><br></div><div>On 11/11/2011, at 20:40, "Chris Green" <<a href="mailto:chris.green@ibstv.co.uk">chris.green@ibstv.co.uk</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"><meta name="Generator" content="Microsoft Word 12 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--><div class="WordSection1"><p class="MsoNormal">Hello<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">I am using QGIS 1.7 in a Windows 7 environment. Everything seems great except for the simplify function (Vector->Geometry Tools->Simplify Geometries)<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">I am trying to simplify an ESRI shape file which is around 95M. I have tried various tolerance settings, but although it looks like some simplification is taking place, actually the file is unchanged. So for example with tolerance setting of 1.0 I get an encouraging message that says:<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal"><i>‘There were 3638321 vertices in original dataset which were reduced to 559351 vertices after simplification’</i><o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">However after saving the changes to the layer, the dataset still looks identical to the un-simplified version and the file size remains unchanged at 95M. I have tried to simplify smaller shape files also, but with the same result. <o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">Can someone tell me what I am I doing wrong?<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p></div></div></blockquote><div><br></div><div>Hi Chris,</div><div>This is a guess...</div><div><br></div><div>I suppose your output file is different to your input file?</div><div><br></div><div>(otherwise windows will probably get confused)</div><br><br>-ramon.<br></body></html>