2012-09-15 18:25:25 +03:00
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#******************************************************************************
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# Adapted from gdal_sieve.py, Copyright (c) 2008, Frank Warmerdam
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#******************************************************************************
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##Analysis=group
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##src_filename=raster
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##dst_filename=output raster
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##connectedness=selection 4;8
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from sextante.gdal.GdalUtils import GdalUtils
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try:
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from osgeo import gdal, ogr
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except ImportError:
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import gdal
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import ogr
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threshold = 2
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connectedness=int(connectedness)
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options = []
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src_ds = gdal.Open( src_filename, gdal.GA_ReadOnly )
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srcband = src_ds.GetRasterBand(1)
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maskband = srcband.GetMaskBand()
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drv = gdal.GetDriverByName(GdalUtils.getFormatShortNameFromFilename(dst_filename))
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dst_ds = drv.Create( dst_filename,src_ds.RasterXSize, src_ds.RasterYSize,1,
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srcband.DataType )
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wkt = src_ds.GetProjection()
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if wkt != '':
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dst_ds.SetProjection( wkt )
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dst_ds.SetGeoTransform( src_ds.GetGeoTransform() )
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dstband = dst_ds.GetRasterBand(1)
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prog_func = gdal.TermProgress
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result = gdal.SieveFilter( srcband, maskband, dstband,
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threshold, connectedness,
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callback = prog_func )
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src_ds = None
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dst_ds = None
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mask_ds = None
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