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39 lines
1.5 KiB
Python
39 lines
1.5 KiB
Python
import numpy
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import rasterio
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# Rasterio exposes GDAL's resampling/decimation on I/O. These are the tests
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# that it does this correctly.
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#
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# Rasterio's test dataset is 718 rows by 791 columns.
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def test_read_out_shape_resample_down():
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with rasterio.open('tests/data/RGB.byte.tif') as s:
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out = numpy.zeros((7, 8), dtype=rasterio.ubyte)
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data = s.read(1, out=out)
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expected = numpy.array([
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[ 0, 8, 5, 7, 0, 0, 0, 0],
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[ 0, 6, 61, 15, 27, 15, 24, 128],
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[ 0, 20, 152, 23, 15, 19, 28, 0],
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[ 0, 17, 255, 25, 255, 22, 32, 0],
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[ 9, 7, 14, 16, 19, 18, 36, 0],
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[ 6, 27, 43, 207, 38, 31, 73, 0],
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[ 0, 0, 0, 0, 74, 23, 0, 0]], dtype=numpy.uint8)
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assert (data == expected).all() # all True.
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def test_read_out_shape_resample_up():
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with rasterio.open('tests/data/RGB.byte.tif') as s:
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out = numpy.zeros((7180, 7910), dtype=rasterio.ubyte)
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data = s.read(1, out=out)
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expected = numpy.array([
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[ 0, 8, 5, 7, 0, 0, 0, 0],
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[ 0, 6, 61, 15, 27, 15, 24, 128],
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[ 0, 20, 152, 23, 15, 19, 28, 0],
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[ 0, 17, 255, 25, 255, 22, 32, 0],
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[ 9, 7, 14, 16, 19, 18, 36, 0],
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[ 6, 27, 43, 207, 38, 31, 73, 0],
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[ 0, 0, 0, 0, 74, 23, 0, 0]], dtype=numpy.uint8)
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assert (data == expected).all() # all True.
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