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109 lines
3.3 KiB
Python
109 lines
3.3 KiB
Python
from affine import Affine
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import pytest
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import rasterio
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from rasterio.errors import RasterioDeprecationWarning
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from rasterio.io import WindowMethodsMixin
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from rasterio.windows import Window
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EPS = 1.0e-8
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def assert_window_almost_equals(a, b, precision=3):
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for pair_outer in zip(a, b):
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for x, y in zip(*pair_outer):
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assert round(x, precision) == round(y, precision)
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class MockDatasetBase(object):
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def __init__(self):
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# from tests/data/RGB.byte.tif
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self.affine = Affine(300.0379266750948, 0.0, 101985.0,
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0.0, -300.041782729805, 2826915.0)
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self.bounds = (101985.0, 2611485.0, 339315.0, 2826915.0)
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self.transform = self.affine
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self.height = 718
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self.width = 791
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def test_windows_mixin():
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class MockDataset(MockDatasetBase, WindowMethodsMixin):
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pass
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src = MockDataset()
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assert_window_almost_equals(
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src.window(*src.bounds),
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((0, src.height), (0, src.width)))
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assert src.window_bounds(Window(0, 0, src.width, src.height)) == src.bounds
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assert src.window_transform(
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Window(0, 0, src.width, src.height)) == src.transform
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def test_windows_mixin_fail():
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class MockDataset(WindowMethodsMixin):
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# doesn't inherit transform, height and width
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pass
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src = MockDataset()
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with pytest.raises(TypeError):
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src.window()
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with pytest.raises(TypeError):
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src.window_bounds()
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with pytest.raises(TypeError):
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src.window_transform()
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def test_window_transform_method():
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with rasterio.open('tests/data/RGB.byte.tif') as src:
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assert src.window_transform(Window(0, 0, None, None)) == src.transform
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assert src.window_transform(Window(None, None, None, None)) == src.transform
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assert src.window_transform(
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Window(1, 1, None, None)).c == src.bounds.left + src.res[0]
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assert src.window_transform(
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((1, None), (1, None))).f == src.bounds.top - src.res[1]
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assert src.window_transform(
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((-1, None), (-1, None))).c == src.bounds.left - src.res[0]
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assert src.window_transform(
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((-1, None), (-1, None))).f == src.bounds.top + src.res[1]
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def test_window_method():
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with rasterio.open('tests/data/RGB.byte.tif') as src:
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left, bottom, right, top = src.bounds
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dx, dy = src.res
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assert_window_almost_equals(
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src.window(left + EPS, bottom + EPS, right - EPS, top - EPS),
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((0, src.height), (0, src.width)))
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assert_window_almost_equals(
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src.window(left, top - 400, left + 400, top),
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((0, 400 / src.res[1]), (0, 400 / src.res[0])))
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assert_window_almost_equals(
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src.window(left, top - 2 * dy - EPS, left + 2 * dx - EPS, top),
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((0, 2), (0, 2)))
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assert_window_almost_equals(
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src.window(left - 2 * dx, top - 2 * dy, left + 2 * dx, top + 2 * dy),
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((-2, 2), (-2, 2)))
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def test_window_bounds_function():
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with rasterio.open('tests/data/RGB.byte.tif') as src:
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rows = src.height
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cols = src.width
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assert src.window_bounds(((0, rows), (0, cols))) == src.bounds
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def test_boundless_deprecation():
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with pytest.warns(RasterioDeprecationWarning):
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with rasterio.open('tests/data/RGB.byte.tif') as src:
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src.window(*src.bounds, boundless=True)
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