Ok, thanks. I'll have to check that out. -----Original Message----- From: Even Rouault [mailto:even.roua...@mines-paris.org] Sent: Monday, December 05, 2011 10:36 AM To: Kyle Shannon Cc: Pouliot, Christopher (DNR); gdal-dev@lists.osgeo.org Subject: Re: [gdal-dev] RE: Editing KML files using ogr_csharp.dll
Selon Kyle Shannon <kshan...@gcs-research.com>: > Can you report your gdal version and where you got it from? Is it from > gisinternals.com/sdk, or did you build it yourself? The old KML driver only supports appending features to a file it has just created. It can't work on an existing KML file that is re-opened afterwards, since the driver only writes new lines at the end of the file (and you cannot write after the ending </kml> marker ...) The new LIBKML driver uses a in-memory DOM, so it is likely a better candidate for updating KML files, but I haven't checked if it works indeed for that use case. > > From: Pouliot, Christopher (DNR) [mailto:christopher.poul...@state.mn.us] > Sent: Monday, December 05, 2011 9:04 AM > To: Kyle Shannon; gdal-dev@lists.osgeo.org > Subject: RE: Editing KML files using ogr_csharp.dll > > Thanks for the response Kyle. > > I do use the CreateDataSource() to create a new KML. But am unable to open > an existing KML for editing using the Open() code I specified below. > > Chris > > From: Kyle Shannon [mailto:kshan...@gcs-research.com] > Sent: Monday, December 05, 2011 9:54 AM > To: Pouliot, Christopher (DNR); gdal-dev@lists.osgeo.org > Subject: RE: Editing KML files using ogr_csharp.dll > > Chris, > > I don' know OGR very well, but I see a few issues. I also am not sure about > the c# bindings, I believe they are pretty complete though. > > '''OSGeo.OGR.Driver drv = Ogr.GetDriverByName("KML"); > DataSource ds = drv.Open("c:\\temp\\mykml.kml", 1);''' > > Open() opens existing files, you need to use driver->CreateDatasource() to > create datasets. Open() opens files for editing. If mykml.kml exists, use > Open(). > > see http://gdal.org/ogr/ogr_apitut.html for information on using OGR to > read/write data > > '''Also, when creating a KML file from scratch is there a way to map the Name > and Description fields to my existing fields so that the Name and Description > appear in Google Earth?''' > > See http://gdal.org/ogr/drv_kml.html for this, it appears to be possible. > > There is also the libkml driver: http://gdal.org/ogr/drv_libkml.html > > kss > > From: gdal-dev-boun...@lists.osgeo.org > [mailto:gdal-dev-boun...@lists.osgeo.org] On Behalf Of Pouliot, Christopher > (DNR) > Sent: Monday, December 05, 2011 7:51 AM > To: gdal-dev@lists.osgeo.org > Subject: [gdal-dev] Editing KML files using ogr_csharp.dll > > Hello All, > > I have a C# application that uses OGR_CSHARP.DLL to read/write KML files. > I'm able to read from KML files fine. I'm able to create a new KML file and > write to it fine. I am unable, however, to open a KML file to edit. I'd > like to be able to append a new layer (folder) onto an existing KML file. > I've tried both of the following code snippets: > > //This returns NULL > OSGeo.OGR.Driver drv = Ogr.GetDriverByName("KML"); > DataSource ds = drv.Open("c:\\temp\\mykml.kml", 1); > > > //This returns NULL > DataSource ds = Ogr.Open("c:\\temp\\mykml.kml", 1); > > > I'm able to use this code to edit File Geodatabases and Shapefiles but not > KML. > > > > Also, when creating a KML file from scratch is there a way to map the Name > and Description fields to my existing fields so that the Name and Description > appear in Google Earth? > > > Thanks, > > Chris > > Chris Pouliot > GIS Application Developer > Minnesota Department of Natural Resources > christopher.poul...@state.mn.us<mailto:christopher.poul...@state.mn.us> > (651) 259-5491 > > > This email message is for the sole use of the intended recipient(s) and may > contain confidential and privileged information. Any unauthorized review, > use, disclosure or distribution is prohibited. If you are not the intended > recipient, please contact the sender by reply email and delete the original > message. > _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
