Dheeraj, The issue is now fixed in trunk and branch-1-10 (check out the latest sources) I've also added a sample application for these methods: http://trac.osgeo.org/gdal/browser/trunk/gdal/swig/csharp/apps/OGRLayerAlg.cs
Best regards, Tamas 2013/10/10 Dheeraj Reddy Mamidi <drmam...@rothwellgroup.com> > Tamas, > > 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 ? > > > Thanks, > Dheeraj > > > > On Thu, Oct 10, 2013 at 2:21 PM, Tamas Szekeres <szeker...@gmail.com>wrote: > >> Dheeraj, >> >> 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: >> http://trac.osgeo.org/gdal/ticket/5264 >> >> Best regards, >> >> Tamas >> >> >> >> >> 2013/10/10 Dheeraj Reddy Mamidi <drmam...@rothwellgroup.com> >> >>> Tamas, >>> >>> Sorry the sample code had wrong data source names. Here is the corrected >>> sample code.. >>> >>> >>> var spatialReference = new OSGeo.OSR.SpatialReference(""); >>> spatialReference.ImportFromProj4("+proj=longlat +ellps=WGS84 >>> +datum=WGS84 +no_defs"); >>> >>> var driver = OSGeo.OGR.Ogr.GetDriverByName("ESRI Shapefile"); >>> >>> DataSource dataSourceToIntersectOn = >>> driver.Open(@"C:\Temp\gdal_32\Polygon.shp", 0); >>> Layer layerToIntersectOn = dataSourceToIntersectOn.GetLayerByIndex(0); >>> >>> DataSource dataSourceToIntersect = >>> driver.Open(@"C:\Temp\gdal_32\Polyline.shp", 0); >>> Layer layerToIntersect = dataSourceToIntersect.GetLayerByIndex(0); >>> >>> var intersectedShapeData = driver.CreateDataSource(@"C:\Temp\gdal_32", >>> new string[] { }); >>> wkbGeometryType wkbGeometryType = >>> layerOriginal.GetLayerDefn().GetGeomType(); >>> Layer intersectedLayer = >>> intersectedShapeData.CreateLayer("intersection", spatialReference, >>> wkbGeometryType, new string[] { }); >>> >>> OSGeo.OGR.SWIGTYPE_p_void callback_data = new >>> OSGeo.OGR.SWIGTYPE_p_void(new IntPtr(5), false, layerToIntersect); >>> >>> OSGeo.OGR.SWIGTYPE_p_GDALProgressFunc callback = new >>> SWIGTYPE_p_GDALProgressFunc(new IntPtr(5), false, layerToIntersect); >>> >>> layerToIntersect.Intersection(layerToIntersectOn, intersectedLayer, new >>> string[] { "SKIP_FAILURES=YES" }, callback, callback_data); // Line where >>> it fails >>> >>> >>> Thanks, >>> Dheeraj >>> >>> >>> On Thu, Oct 10, 2013 at 1:16 PM, Dheeraj Reddy Mamidi < >>> drmam...@rothwellgroup.com> wrote: >>> >>>> Hi Tamas, >>>> >>>> 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 "Attempt to dereference null >>>> GDALProgressFunc". If I just pass those arguments initializing them >>>> they way I am doing below in the sample code, I get "Attempted to >>>> read or write protected memory. This is often an indication that other >>>> memory is corrupt." error. >>>> >>>> I am using Gdal 1.10 library. >>>> >>>> Here is the sample code.. >>>> >>>> var spatialReference = new OSGeo.OSR.SpatialReference(""); >>>> spatialReference.ImportFromProj4("+proj=longlat +ellps=WGS84 >>>> +datum=WGS84 +no_defs"); >>>> >>>> var driver = OSGeo.OGR.Ogr.GetDriverByName("ESRI Shapefile"); >>>> >>>> DataSource dataSourceToIntersectOn = >>>> driver.Open(@"C:\Temp\gdal_32\Polygon.shp", 0); >>>> Layer layerToIntersectOn = dataSourceCookieCutter.GetLayerByIndex(0); >>>> >>>> DataSource dataSourceToIntersect = >>>> driver.Open(@"C:\Temp\gdal_32\Polyline.shp", 0); >>>> Layer layerToIntersect = dataSourceOriginal.GetLayerByIndex(0); >>>> >>>> var intersectedShapeData = driver.CreateDataSource(@"C:\Temp\gdal_32", >>>> new string[] { }); >>>> wkbGeometryType wkbGeometryType = >>>> layerOriginal.GetLayerDefn().GetGeomType(); >>>> Layer intersectedLayer = >>>> intersectedShapeData.CreateLayer("intersection", spatialReference, >>>> wkbGeometryType, new string[] { }); >>>> >>>> OSGeo.OGR.SWIGTYPE_p_void callback_data = new >>>> OSGeo.OGR.SWIGTYPE_p_void(new IntPtr(5), false, layerToIntersect); >>>> >>>> OSGeo.OGR.SWIGTYPE_p_GDALProgressFunc callback = new >>>> SWIGTYPE_p_GDALProgressFunc(new IntPtr(5), false, layerToIntersect); >>>> >>>> layerToIntersect.Intersection(layerToIntersectOn, intersectedLayer, new >>>> string[] { "SKIP_FAILURES=YES" }, callback, callback_data); // Line where >>>> it fails >>>> >>>> >>>> The data that I am trying to intersect (shapefiles are attached). >>>> >>>> >>>> Thanks, >>>> Dheeraj >>>> >>>> >>>> >>>> >>>> >>>> On Thu, Oct 10, 2013 at 12:33 PM, Tamas Szekeres >>>> <szeker...@gmail.com>wrote: >>>> >>>>> Dheeraj, >>>>> >>>>> I don't think the 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. >>>>> >>>>> Best regards, >>>>> >>>>> Tamas >>>>> >>>>> >>>>> >>>>> 2013/10/10 Dheeraj Reddy Mamidi <drmam...@rothwellgroup.com> >>>>> >>>>>> Hi list, >>>>>> >>>>>> I have troubles with C# bindings of OGR. I was trying to perform >>>>>> intersection on two feature classes (shape file formats) using >>>>>> OSGeo.OGR.Layer.Intersection(), but have problems making it work. I >>>>>> keep getting an error saying "AccessViolationException was >>>>>> unhandled. Attempted to read or write protected memory. This is often an >>>>>> indication that other memory is corrupt. >>>>>> >>>>>> Is the above error something to do with SWIGTYPE_p_GDALProgressFunc >>>>>> callback and OSGeo.OGR.SWIGTYPE_p_void callback_data arguments? I >>>>>> tried passing those parameters null as suggested by some in the forums >>>>>> butI keep getting the error "Attempt to dereference >>>>>> null GDALProgressFunc". I am not sure what that means. >>>>>> >>>>>> And when I instantiate callback as new SWIGTYPE_p_GDALProgressFunc() >>>>>> and new callback_data as new SWIGTYPE_p_void(), I don't get error Attempt >>>>>> to dereference null GDALProgressFunc, but still have error saying >>>>>> AccessViolationException >>>>>> was unhandled. Attempted to read or write protected memory. This is often >>>>>> an indication that other memory is corrupt. >>>>>> >>>>>> Can someone please help me figure this out and let me know how to >>>>>> make use of OSGeo.OGR.Layer.Intersection() in the right way with c# >>>>>> bindings. Thank you. >>>>>> >>>>>> Thanks, >>>>>> Dheeraj >>>>>> >>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> gdal-dev mailing list >>>>>> gdal-dev@lists.osgeo.org >>>>>> http://lists.osgeo.org/mailman/listinfo/gdal-dev >>>>>> >>>>> >>>>> >>>> >>>> >>>> -- >>>> >>>> >>> >>> >>> -- >>> Dheeraj Reddy Mamidi >>> >>> >> > > > -- > Dheeraj Reddy Mamidi > > Software Developer > The Rothwell Group, L.P. > Email: drmam...@rothwellgroup.com <atvaug...@rothwellgroup.com> > Phone: 713-952-5355 ext.30 > Web: www.rothwellgroup.com >
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