<div dir="ltr">Hi Tamas,<div><br></div><div>I was working with OsGeo.OGR.Layer.Intersection c# bindings and have problems with setting string[] of options. The intersection of layers are creating some invalid geometries to write in to intersected layer (Error is thrown - ApplicationException was unhandled - Attempt to write non-polygon (GEOMETRYCOLLECTION) geometry to POLYGON type shapefile). I read the documentation and saw options can be enabled like SKIP_FAILURES=YES to skip <font color="#000000" face="Lucida Grande, Verdana, Geneva, Arial, sans-serif"><span style="font-size:12px">and continue if feature cannot be inserted, but setting option the way I did below to skip still throws the above error.</span></font></div>
<div><font color="#000000" face="Lucida Grande, Verdana, Geneva, Arial, sans-serif"><span style="font-size:12px"><br></span></font></div><div><font color="#000000" face="Lucida Grande, Verdana, Geneva, Arial, sans-serif"><span style="font-size:12px">string[] options = new string[] {"SKIP_FAILURES=YES"};</span><br>
</font></div><div><font color="#000000" face="Lucida Grande, Verdana, Geneva, Arial, sans-serif"><span style="font-size:12px">layerOriginal.Intersection(layerToIntersect, intersectedLayer, options, new Ogr.GDALProgressFuncDelegate(ProgressFunc)</span></font><span style="font-size:12px;color:rgb(0,0,0);font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif">, "Intersection");</span></div>
<div><span style="font-size:12px;color:rgb(0,0,0);font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif"><br></span></div><div><span style="font-size:12px;color:rgb(0,0,0);font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif">Can you help me figure out how to set the options parameter to Intersection method ? Thank you.</span></div>
<div><span style="font-size:12px;color:rgb(0,0,0);font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif"><br></span></div><div><span style="font-size:12px;color:rgb(0,0,0);font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif"><br>
</span></div><div><span style="font-size:12px;color:rgb(0,0,0);font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif">Thanks,</span></div><div><span style="font-size:12px;color:rgb(0,0,0);font-family:'Lucida Grande',Verdana,Geneva,Arial,sans-serif">Dheeraj</span></div>
<div><font color="#000000" face="Lucida Grande, Verdana, Geneva, Arial, sans-serif"><span style="font-size:12px"><br></span></font></div><div><font color="#000000" face="Lucida Grande, Verdana, Geneva, Arial, sans-serif"><span style="font-size:12px"><br>
</span></font></div><div><font color="#000000" face="Lucida Grande, Verdana, Geneva, Arial, sans-serif"><span style="font-size:12px"><br></span></font></div><div><font color="#000000" face="Lucida Grande, Verdana, Geneva, Arial, sans-serif"><span style="font-size:12px"><br>
</span></font></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Oct 11, 2013 at 11:25 AM, Dheeraj Reddy Mamidi <span dir="ltr"><<a href="mailto:drmamidi@rothwellgroup.com" target="_blank">drmamidi@rothwellgroup.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Tamas,<div><br></div><div>You are right. Output shapefile cannot have mixed geometries in the same file. But two input shapefiles (layers) can be of different geometries types to perform operations like intersection.</div>
<div><br></div><div><br></div><div>Thanks,</div><div>Dhheraj</div></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Oct 11, 2013 at 11:19 AM, Tamas Szekeres <span dir="ltr"><<a href="mailto:szekerest@gmail.com" target="_blank">szekerest@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>You may probably leave this checking out, I 'm not sure about all aspects of these functions. Actually the output file is a shapefile which doesn't support mixed geometries in the same file.</div>
<span><font color="#888888">
<div> </div><div>Tamas</div><div> </div><div> </div></font></span></div><div><div><div class="gmail_extra"><br><br><div class="gmail_quote">2013/10/11 Dheeraj Reddy Mamidi <span dir="ltr"><<a href="mailto:drmamidi@rothwellgroup.com" target="_blank">drmamidi@rothwellgroup.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Tamas,<div><br></div><div>Thank you very much for fixing the issue so quickly! I really appreciate it. That really saved lot of time for me to figure out what was wrong.</div>
<div><br></div><div>One thing that I would like to discuss is with regards to <a style="font-family:arial,sans-serif;font-size:13px" href="http://trac.osgeo.org/gdal/browser/trunk/gdal/swig/csharp/apps/OGRLayerAlg.cs" target="_blank">http://trac.osgeo.org/gdal/browser/trunk/gdal/swig/csharp/apps/OGRLayerAlg.cs</a> (sample application). </div>
<div><br></div><div>Line 108:</div><div><br></div><div><div>if (layer1.GetLayerDefn().GetGeomType() != layer2.GetLayerDefn().GetGeomType())</div><div> {</div><div> Console.WriteLine("FAILURE: Geometry type doesn't match");</div>
<div> System.Environment.Exit(-1);</div><div> }</div></div><div><br></div><div>In the above line where you check if geometry type of layer1 and layer2 are equal, If not equal you say Geometry type do not match. I was wondering layer geometry types can be different (eg a polygon shapefile and polyline shapefile etc) to do intersection right ? </div>
<div><br></div><div><br></div><div>Thanks,</div><div>Dheeraj</div><div><br></div><div><br></div><div><br></div></div><div><div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Oct 11, 2013 at 3:19 AM, Tamas Szekeres <span dir="ltr"><<a href="mailto:szekerest@gmail.com" target="_blank">szekerest@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div dir="ltr">Dheeraj,<div><br></div><div>The issue is now fixed in trunk and branch-1-10 (check out the latest sources)</div>
<div>I've also added a sample application for these methods:</div><div><a href="http://trac.osgeo.org/gdal/browser/trunk/gdal/swig/csharp/apps/OGRLayerAlg.cs" target="_blank">http://trac.osgeo.org/gdal/browser/trunk/gdal/swig/csharp/apps/OGRLayerAlg.cs</a></div>
<div><br></div><div>Best regards,</div><div><br></div><div>Tamas</div><div><br><div class="gmail_extra"><br><br><div class="gmail_quote"><div>2013/10/10 Dheeraj Reddy Mamidi <span dir="ltr"><<a href="mailto:drmamidi@rothwellgroup.com" target="_blank">drmamidi@rothwellgroup.com</a>></span><br>
</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div dir="ltr"><div>Tamas,<div><br></div>
<div>I appreciate you adding a ticket for this issue. Thanks. Is there any other option for me to use OGRLayer intersection with out C# bindings for now ? </div>
<div><br></div><div><br></div>
<div>Thanks,</div></div><div>Dheeraj</div><div><br></div></div><div class="gmail_extra"><div><div><br><br><div class="gmail_quote"><div>On Thu, Oct 10, 2013 at 2:21 PM, Tamas Szekeres <span dir="ltr"><<a href="mailto:szekerest@gmail.com" target="_blank">szekerest@gmail.com</a>></span> wrote:<br>
</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div><div dir="ltr">Dheeraj,<div><br></div>
<div>I noticed you are talking about the layer level geometry functions, which hasn't been updated in the C# bindings yet. I'll add the necessary implementation shorly. Also added a ticket to track the changes: <a href="http://trac.osgeo.org/gdal/ticket/5264" target="_blank">http://trac.osgeo.org/gdal/ticket/5264</a></div>
<div><br></div><div>Best regards,</div><div><br></div><div>Tamas</div><div><br></div><div><br></div></div></div><div><div><div class="gmail_extra"><br><br><div class="gmail_quote"><div>2013/10/10 Dheeraj Reddy Mamidi <span dir="ltr"><<a href="mailto:drmamidi@rothwellgroup.com" target="_blank">drmamidi@rothwellgroup.com</a>></span><br>
</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div dir="ltr"><div>Tamas,<div><br></div>
<div>Sorry the sample code had wrong data source names. Here is the corrected sample code..</div>
<div><br></div><div><br></div></div><div><div><div><div style="font-family:arial,sans-serif;font-size:13px">
<div>var spatialReference = new OSGeo.OSR.SpatialReference("");</div><div>spatialReference.ImportFromProj4("+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs");</div><div><br></div><div>var driver = OSGeo.OGR.Ogr.GetDriverByName("ESRI Shapefile");<br>
</div></div><div style="font-family:arial,sans-serif;font-size:13px"><br></div></div><div style="font-family:arial,sans-serif;font-size:13px"><div><div>DataSource dataSourceToIntersectOn = driver.Open(@"C:\Temp\gdal_32\Polygon.shp", 0);</div>
</div><div>Layer layerToIntersectOn = dataSourceToIntersectOn.GetLayerByIndex(0);</div></div><div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px"><div>
<div>DataSource dataSourceToIntersect = driver.Open(@"C:\Temp\gdal_32\Polyline.shp", 0);</div>
</div><div>Layer layerToIntersect = dataSourceToIntersect.GetLayerByIndex(0);</div></div><div><div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">
<div>var intersectedShapeData = driver.CreateDataSource(@"C:\Temp\gdal_32", new string[] { });</div>
<div>wkbGeometryType wkbGeometryType = layerOriginal.GetLayerDefn().GetGeomType();</div><div>Layer intersectedLayer = intersectedShapeData.CreateLayer("intersection", spatialReference, wkbGeometryType, new string[] { });</div>
</div><div style="font-family:arial,sans-serif;font-size:13px"><br></div></div></div><div style="font-family:arial,sans-serif;font-size:13px"><div><div><div>OSGeo.OGR.SWIGTYPE_p_void callback_data = new OSGeo.OGR.SWIGTYPE_p_void(new IntPtr(5), false, layerToIntersect);</div>
<div><br></div><div>OSGeo.OGR.SWIGTYPE_p_GDALProgressFunc callback = new SWIGTYPE_p_GDALProgressFunc(new IntPtr(5), false, layerToIntersect);</div><div><br></div><div>layerToIntersect.Intersection(layerToIntersectOn, intersectedLayer, new string[] { "SKIP_FAILURES=YES" }, callback, callback_data); // Line where it fails</div>
<div><br></div><div><br></div></div><div>Thanks,</div></div><div>Dheeraj</div></div></div><div class="gmail_extra"><div><div><br><br><div class="gmail_quote"><div>On Thu, Oct 10, 2013 at 1:16 PM, Dheeraj Reddy Mamidi <span dir="ltr"><<a href="mailto:drmamidi@rothwellgroup.com" target="_blank">drmamidi@rothwellgroup.com</a>></span> wrote:<br>
</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div dir="ltr"><div>Hi Tamas,<div><br></div>
<div>Thanks for your response. In fact I don't require progress notification, but I am not able to ignore those arguments (pass them as null). If I pass them as null I get error <span style="font-family:verdana,sans-serif;font-size:13px;white-space:pre-wrap">"Attempt to </span><span style="font-family:verdana,sans-serif;font-size:13px;white-space:pre-wrap">dereference null GDALProgressFunc". </span>If I just pass those arguments initializing them they way I am doing below in the sample code, I get "<span style="line-height:15.7px;font-family:verdana,sans-serif;font-size:12px;white-space:pre-wrap">Attempted to read or write protected memory. This is often an indication that other memory is corrupt.</span>" error. </div>
<div><br></div><div>I am using Gdal 1.10 library.</div><div><br></div><div>Here is the sample code..</div><div><br></div></div><div><div><div><div>var spatialReference = new OSGeo.OSR.SpatialReference("");</div>
<div>spatialReference.ImportFromProj4("+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs");</div>
<div><br></div><div>var driver = OSGeo.OGR.Ogr.GetDriverByName("ESRI Shapefile");<br></div></div><div><br></div><div><div>DataSource dataSourceToIntersectOn = driver.Open(@"C:\Temp\gdal_32\Polygon.shp", 0);</div>
<div>Layer layerToIntersectOn = dataSourceCookieCutter.GetLayerByIndex(0);</div></div><div><br></div><div><div>DataSource dataSourceToIntersect = driver.Open(@"C:\Temp\gdal_32\Polyline.shp", 0);</div><div>Layer layerToIntersect = dataSourceOriginal.GetLayerByIndex(0);</div>
</div><div><br></div><div><div>var intersectedShapeData = driver.CreateDataSource(@"C:\Temp\gdal_32", new string[] { });</div><div>wkbGeometryType wkbGeometryType = layerOriginal.GetLayerDefn().GetGeomType();</div>
<div>Layer intersectedLayer = intersectedShapeData.CreateLayer("intersection", spatialReference, wkbGeometryType, new string[] { });</div></div><div><br></div><div><div>OSGeo.OGR.SWIGTYPE_p_void callback_data = new OSGeo.OGR.SWIGTYPE_p_void(new IntPtr(5), false, layerToIntersect);</div>
<div><br></div><div>OSGeo.OGR.SWIGTYPE_p_GDALProgressFunc callback = new SWIGTYPE_p_GDALProgressFunc(new IntPtr(5), false, layerToIntersect);</div><div><br></div><div>layerToIntersect.Intersection(layerToIntersectOn, intersectedLayer, new string[] { "SKIP_FAILURES=YES" }, callback, callback_data); // Line where it fails</div>
</div><div><br></div><div><br></div><div>The data that I am trying to intersect (shapefiles are attached).</div><div><br></div><div><br></div><div>Thanks,</div></div><div>Dheeraj</div><div><br></div><div><br></div><div><br>
</div>
</div><div class="gmail_extra"><div><div><br><br><div class="gmail_quote"><div>On Thu, Oct 10, 2013 at 12:33 PM, Tamas Szekeres <span dir="ltr"><<a href="mailto:szekerest@gmail.com" target="_blank">szekerest@gmail.com</a>></span> wrote:<br>
</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div dir="ltr"><div>Dheeraj,<div><br></div>
<div>I don't think the <span style="font-family:verdana,sans-serif;font-size:12.72px;white-space:pre-wrap">OSGeo.OGR.Layer.Intersection supports progress notification. You might probably have encountered a bug which should be fixed. Do you have a sample code to reproduce this issue? I would specifically interested in the actual geometries have been passed to the function.</span></div>
<div><span style="font-family:verdana,sans-serif;font-size:12.72px;white-space:pre-wrap"><br></span></div></div><div><span style="font-family:verdana,sans-serif;font-size:12.72px;white-space:pre-wrap">Best regards,</span></div>
<div><span style="font-family:verdana,sans-serif;font-size:12.72px;white-space:pre-wrap"><br></span></div><div><span style="font-family:verdana,sans-serif;font-size:12.72px;white-space:pre-wrap">Tamas</span></div>
<div><span style="font-family:verdana,sans-serif;font-size:12.72px;white-space:pre-wrap"><br></span></div></div><div><div class="gmail_extra"><br><br><div class="gmail_quote"><div>2013/10/10 Dheeraj Reddy Mamidi <span dir="ltr"><<a href="mailto:drmamidi@rothwellgroup.com" target="_blank">drmamidi@rothwellgroup.com</a>></span><br>
</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div><div><div dir="ltr"><font face="verdana, sans-serif">Hi list,</font><div>
<font face="verdana, sans-serif"><br clear="all">
</font><div>
<font face="verdana, sans-serif">I have troubles with C# bindings of OGR. <span style="white-space:pre-wrap">I was trying to perform intersection on two feature classes (shape file formats) </span><span style="white-space:pre-wrap">using OSGeo.OGR.Layer.Intersection(), but have problems making it work. </span><span style="line-height:1.3em;font-size:0.93em;white-space:pre-wrap">I keep getting an error saying </span></font><span style="line-height:1.3em;font-family:verdana,sans-serif;font-size:0.93em;white-space:pre-wrap">"AccessViolationException was unhandled. Attempted to read or write protected memory. This is often an indication that other memory is corrupt.</span></div>
<div><span style="line-height:1.3em;font-family:verdana,sans-serif;font-size:0.93em;white-space:pre-wrap"><br></span></div><div><font face="verdana, sans-serif"><span style="white-space:pre-wrap">Is the above error something to do with </span><span style="white-space:pre-wrap">SWIGTYPE_p_GDALProgressFunc callback </span><span style="white-space:pre-wrap">and OSGeo.OGR.SWIGTYPE_p_void callback_data arguments? </span></font><span style="font-family:verdana,sans-serif;white-space:pre-wrap">I tried passing those parameters null as suggested by some in the forums but</span><span style="font-family:verdana,sans-serif;white-space:pre-wrap"> I keep getting the error "Attempt to </span><span style="font-family:verdana,sans-serif;white-space:pre-wrap">dereference null GDALProgressFunc". I am not sure what that means. </span></div>
<div><span style="font-family:verdana,sans-serif;white-space:pre-wrap"><br></span></div><div><span style="font-family:verdana,sans-serif;white-space:pre-wrap">And when I instantiate callback as new </span><font color="#000000" face="verdana, sans-serif"><span style="white-space:pre-wrap">SWIGTYPE_p_GDALProgressFunc() and new callback_data as new SWIGTYPE_p_void(), I don't get error </span></font><span style="font-family:verdana,sans-serif;white-space:pre-wrap">Attempt to </span><span style="font-family:verdana,sans-serif;white-space:pre-wrap">dereference null GDALProgressFunc, but still have error saying </span><span style="line-height:15.7px;font-family:verdana,sans-serif;font-size:12px;white-space:pre-wrap">AccessViolationException was unhandled. Attempted to read or write protected memory. This is often an indication that other memory is corrupt.</span></div>
<div><span style="line-height:15.7px;font-family:verdana,sans-serif;font-size:12px;white-space:pre-wrap"><br></span></div><div><span style="line-height:15.7px;font-family:verdana,sans-serif;font-size:12px;white-space:pre-wrap">Can someone please help me figure this out and let me know how to make use of </span><span style="font-family:verdana,sans-serif;white-space:pre-wrap">OSGeo.OGR.Layer.Intersection() in the right way with c# bindings. Thank you.</span></div>
<div><span style="font-family:verdana,sans-serif;white-space:pre-wrap"><br></span></div><div><span style="font-family:verdana,sans-serif;white-space:pre-wrap">Thanks,</span></div><div>Dheeraj<br>
</div><div dir="ltr"><div><br></div><div><br></div></div>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr">Dheeraj Reddy Mamidi<div><br></div><div><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">Software Developer</span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">
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</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr">Dheeraj Reddy Mamidi<div><br></div><div><span style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">Software Developer</span><br style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">
<span style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">The Rothwell Group, L.P.</span><br style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">
<span style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">Email: </span><a href="mailto:atvaughan@rothwellgroup.com" style="color:rgb(17,85,204);font-size:13px;font-family:arial,sans-serif" target="_blank">drmamidi@rothwellgroup.com</a><br style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">
<span style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">Phone: </span><a value="+17139525355" style="color:rgb(17,85,204);font-size:13px;font-family:arial,sans-serif">713-952-5355 ext.30</a><br style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">
<span style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">Web: </span><a href="http://www.rothwellgroup.com/" style="color:rgb(17,85,204);font-size:13px;font-family:arial,sans-serif" target="_blank">www.rothwellgroup.com</a>
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</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr">Dheeraj Reddy Mamidi<div><br></div><div><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">Software Developer</span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">
<span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">The Rothwell Group, L.P.</span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">
<span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">Email: </span><a href="mailto:atvaughan@rothwellgroup.com" style="color:rgb(17,85,204);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)" target="_blank">drmamidi@rothwellgroup.com</a><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">
<span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">Phone: </span><a value="+17139525355" style="color:rgb(17,85,204);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">713-952-5355 ext.30</a><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">
<span style="font-size:13px;color:rgb(34,34,34);font-family:arial,sans-serif;background-color:rgb(255,255,255)">Web: </span><a href="http://www.rothwellgroup.com/" style="font-size:13px;color:rgb(17,85,204);font-family:arial,sans-serif;background-color:rgb(255,255,255)" target="_blank">www.rothwellgroup.com</a>
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