<div dir="ltr"><div class="gmail_extra">My bad... I finally got it working with your code :</div><div class="gmail_extra"><br></div><div class="gmail_extra"><div class="gmail_extra">import os</div><div class="gmail_extra">import sys</div><div class="gmail_extra">from osgeo import gdal, ogr, osr<br></div><div class="gmail_extra"><br></div><div class="gmail_extra">geojson_filename = "my.geojson"</div><div class="gmail_extra">driver = ogr.GetDriverByName("GeoJSON")</div><div class="gmail_extra">vector_ds  = gdal.OpenEx( geojson_filename, gdal.OF_VECTOR )</div><div class="gmail_extra"><br></div><div class="gmail_extra">geotiff_filename = "my.tif"</div><div class="gmail_extra">ds = gdal.Open(geotiff_filename, gdal.GA_Update)</div><div class="gmail_extra"><br></div><div class="gmail_extra">ret = gdal.Rasterize(ds,</div><div class="gmail_extra">                    vector_ds,</div><div class="gmail_extra">                    bands = [4],</div><div class="gmail_extra">                    inverse = True,</div><div class="gmail_extra">                    burnValues = [0])</div><div class="gmail_extra"><br></div><div class="gmail_extra">if ret != 1:</div><div class="gmail_extra">    print 'fail'</div><div class="gmail_extra">else:</div><div class="gmail_extra">    print 'success'</div><div><br></div><div>Cheers and thanks again</div><div><br></div><div>François</div><div><br></div><div><br></div></div></div>