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import sys
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import osgeo
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from osgeo import gdal
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import os
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import numpy
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import pysci
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import scipy
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from gdalconst import *
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import osr
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10
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11
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#Check for Nodata values (-2147800000) in each layer of final multiband raster
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ds= gdal.Open('/data/project/organisms/LandCover/Final_Multiband_SinuGrid.bil', GA_ReadOnly)
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13
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band1=ds.GetRasterBand(1)
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band2=ds.GetRasterBand(2)
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band3=ds.GetRasterBand(3)
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band4=ds.GetRasterBand(4)
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band5=ds.GetRasterBand(5)
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band6=ds.GetRasterBand(6)
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band7=ds.GetRasterBand(7)
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band8=ds.GetRasterBand(8)
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band9=ds.GetRasterBand(9)
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band10=ds.GetRasterBand(10)
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24
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25
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#play around with commands
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min1 = band1.GetMinimum()
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max1 = band1.GetMaximum()
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if min1 is None or max1 is None:
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(min1,max1) = band1.ComputeRasterMinMax(1)
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print 'Min=%.3f, Max=%.3f' % (min1,max1)
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31
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32
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33
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cols=ds.RasterXSize
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34
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rows=ds.RasterYSize
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35
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array1=band1.ReadAsArray(0,0,cols,rows)
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array2=band2.ReadAsArray(0,0,cols,rows)
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array3=band3.ReadAsArray(0,0,cols,rows)
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array4=band4.ReadAsArray(0,0,cols,rows)
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array5=band5.ReadAsArray(0,0,cols,rows)
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array6=band6.ReadAsArray(0,0,cols,rows)
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array7=band7.ReadAsArray(0,0,cols,rows)
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array8=band8.ReadAsArray(0,0,cols,rows)
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array9=band9.ReadAsArray(0,0,cols,rows)
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45
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array10=band10.ReadAsArray(0,0,cols,rows)
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46
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47
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ND_band1=numpy.where(array1==-2147800000)
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48
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ND_band2=numpy.where(array2==-2.1478e+09)
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49
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ND_band3=numpy.where(array3==-2.1478e+09)
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ND_band4=numpy.where(array4==-2.1478e+09)
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ND_band5=numpy.where(array5==-2.1478e+09)
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ND_band6=numpy.where(array6==-2.1478e+09)
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ND_band7=numpy.where(array7==-2.1478e+09)
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ND_band8=numpy.where(array8==-2.1478e+09)
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ND_band9=numpy.where(array9==-2.1478e+09)
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ND_band10=numpy.where(array10==-2.1478e+09)
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57
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58
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ND_band1
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ND_band2
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ND_band3
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ND_band4
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ND_band5
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ND_band6
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64
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ND_band7
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65
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ND_band8
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ND_band9
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ND_band10
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68
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69
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#None found
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70
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71
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#Check for nodata values individually in each layer/clip file from original LandCover data download, these files being un-processed (i.e. nodata value unchanged)
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72
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73
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test= gdal.Open('/data/project/organisms/LandCover/Layer10_Clip3.tif', GA_ReadOnly)
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74
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ncol=test.RasterXSize
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nrow=test.RasterYSize
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testarray= test.ReadAsArray(0,0,ncol, nrow)
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numpy.where(testarray== 255)
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78
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#Final check= test for max value in each layer/clip file. Look for instances of 255
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80
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y= gdal.Open('/data/project/organisms/LandCover/Layer10_Clip1.tif', GA_ReadOnly)
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82
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nco= y.RasterXSize
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nro= y.RasterYSize
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84
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ta= y.ReadAsArray(0,0,nco,nro)
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85
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ta.min()
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86
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ta.max()
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87
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88
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u= gdal.Open('/data/project/organisms/LandCover/Layer10_Clip2.tif', GA_ReadOnly)
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89
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o= u.RasterXSize
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90
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i= u.RasterYSize
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91
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ua= u.ReadAsArray(0,0,o,i)
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92
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ua.min()
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93
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ua.max()
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94
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95
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x= gdal.Open('/data/project/organisms/LandCover/Layer10_Clip3.tif', GA_ReadOnly)
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96
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c= x.RasterXSize
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97
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d= x.RasterYSize
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98
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xa= x.ReadAsArray(0,0,c,d)
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99
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xa.min()
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100
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xa.max()
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101
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102
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#NO NoData FOUND IN ANY FILES
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103
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