public void createBuffer() { //String inputFile,String opFile,int bufferDistance

    String sourceFilename = "C:/img/AS-ORYSA.geo.tif";
    int bufferDistance = 10;
    gdal.AllRegister();

    //convert tif to .shp file
    Dataset tifDataSet = gdal.Open(sourceFilename, gdalconstConstants.GA_ReadOnly);
    Band srcBand = tifDataSet.GetRasterBand(1);
    System.out.println("srcBand DS ---------" + srcBand.GetBand() );

    Driver shpDriver = org.gdal.ogr.ogr.GetDriverByName("Esri Shapefile");
    String shpFilePath = "C:/img/Poly1.shp";
    String opFile = "C:/img/PolyNew1.shp";
    DataSource shpDS = shpDriver.CreateDataSource(shpFilePath);

    SpatialReference srs = new SpatialReference();
    Layer dstLayer = shpDS.CreateLayer("Poly", srs);
    int  p = gdal.Polygonize(srcBand, null, dstLayer, -1,null);
    System.out.println("polygonize ---------" + p );


    //create Buffer & rasterize
    DataSource inputShapeDS =  org.gdal.ogr.ogr.Open(shpFilePath);
    System.out.println("ds layer count ---------" + inputShapeDS.GetLayerCount() );

    DataSource orgSourceDS = org.gdal.ogr.ogr.GetDriverByName("Memory").CopyDataSource(
            inputShapeDS, "");

    Layer srcLayer = orgSourceDS.GetLayer(0);

    FeatureDefn srcLayerDefn = srcLayer.GetLayerDefn();
    FieldDefn fielddefn = srcLayerDefn.GetFieldDefn(0);
    System.out.println("Field defn ---------" +  fielddefn.GetName());

    long n = srcLayer.GetFeatureCount(1);
    System.out.println("inputLayer Feature count ---------" + n );

    Driver shapeDriver = org.gdal.ogr.ogr.GetDriverByName("ESRI Shapefile");
    //delete ds if file exists
    File file = new File(opFile);
    if (file.exists())
        shapeDriver.DeleteDataSource(opFile);
    //map ds to op file
    DataSource outputShapeDS =  shapeDriver.CreateDataSource(opFile);

    SpatialReference spatialRef = new SpatialReference();
Geometry geometry = new Geometry(org.gdal.ogr.ogr.wkbPolygon);
    Layer outputLayer = outputShapeDS.CreateLayer(opFile, spatialRef, geometry.GetGeometryType());
    FeatureDefn outputLayerDefn = outputLayer.GetLayerDefn();
    System.out.println("outputLayerDefn  ---------" + outputLayerDefn.GetFieldCount() );


    //Get Features & Iterate .need to check
    for(long l =1; l < srcLayer.GetFeatureCount();l++) {
        Feature feat = srcLayer.GetFeature(l);
        System.out.println("inputLayer Feature  ---------" + feat.GetFID() );
        Geometry inputGeo = feat.GetGeometryRef();
        inputGeo.Buffer(bufferDistance);
        //set it op feature
        Feature opFeature  = new Feature(outputLayerDefn);
        outputLayer.CreateFeature(opFeature);

    }


}