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https://github.com/rasterio/rasterio.git
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fed3bcaed7
block() return the window and size in bytes of a TIFF block. The size is undefined for other formats and will be None. Resolves #1077
174 lines
6.2 KiB
Python
174 lines
6.2 KiB
Python
from functools import partial
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import logging
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import os.path
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import shutil
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import subprocess
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import sys
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import tempfile
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import unittest
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import numpy as np
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import pytest
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import rasterio
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from rasterio import windows
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class WindowTest(unittest.TestCase):
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def test_window_shape_None_start(self):
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self.assertEqual(
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rasterio.window_shape(((None, 4), (None, 102))),
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(4, 102))
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def test_window_shape_None_stop(self):
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self.assertEqual(
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rasterio.window_shape(((10, None), (10, None)), 100, 90),
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(90, 80))
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def test_window_shape_positive(self):
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self.assertEqual(
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rasterio.window_shape(((0, 4), (1, 102))),
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(4, 101))
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def test_window_shape_negative(self):
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self.assertEqual(
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rasterio.window_shape(((-10, None), (-10, None)), 100, 90),
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(10, 10))
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self.assertEqual(
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rasterio.window_shape(((~0, None), (~0, None)), 100, 90),
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(1, 1))
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self.assertEqual(
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rasterio.window_shape(((None, ~0), (None, ~0)), 100, 90),
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(99, 89))
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def test_eval(self):
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self.assertEqual(
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rasterio.eval_window(((-10, None), (-10, None)), 100, 90),
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windows.Window.from_ranges((90, 100), (80, 90)))
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self.assertEqual(
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rasterio.eval_window(((None, -10), (None, -10)), 100, 90),
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windows.Window.from_ranges((0, 90), (0, 80)))
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def test_window_index():
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idx = rasterio.window_index(((0, 4), (1, 12)))
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assert len(idx) == 2
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r, c = idx
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assert r.start == 0
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assert r.stop == 4
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assert c.start == 1
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assert c.stop == 12
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arr = np.ones((20, 20))
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assert arr[idx].shape == (4, 11)
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class RasterBlocksTest(unittest.TestCase):
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def test_blocks(self):
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with rasterio.open('tests/data/RGB.byte.tif') as s:
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self.assertEqual(len(s.block_shapes), 3)
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self.assertEqual(s.block_shapes, ((3, 791), (3, 791), (3, 791)))
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itr = s.block_windows(1)
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(j, i), first = next(itr)
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self.assertEqual((j, i), (0, 0))
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self.assertEqual(first, windows.Window.from_ranges((0, 3), (0, 791)))
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itr = s.block_windows()
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(j, i), first = next(itr)
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self.assertEqual((j, i), (0, 0))
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self.assertEqual(first, windows.Window.from_ranges((0, 3), (0, 791)))
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(j, i), second = next(itr)
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self.assertEqual((j, i), (1, 0))
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self.assertEqual(second, windows.Window.from_ranges((3, 6), (0, 791)))
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(j, i), last = list(itr)[~0]
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self.assertEqual((j, i), (239, 0))
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self.assertEqual(last, windows.Window.from_ranges((717, 718), (0, 791)))
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def test_block_coverage(self):
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with rasterio.open('tests/data/RGB.byte.tif') as s:
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self.assertEqual(
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s.width * s.height,
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sum((w[0][1] - w[0][0]) * (w[1][1] - w[1][0])
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for ji, w in s.block_windows(1)))
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class WindowReadTest(unittest.TestCase):
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def test_read_window(self):
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with rasterio.open('tests/data/RGB.byte.tif') as s:
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windows = s.block_windows(1)
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ji, first_window = next(windows)
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first_block = s.read(1, window=first_window)
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self.assertEqual(first_block.dtype, rasterio.ubyte)
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self.assertEqual(
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first_block.shape,
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rasterio.window_shape(first_window))
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class WindowWriteTest(unittest.TestCase):
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def setUp(self):
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self.tempdir = tempfile.mkdtemp()
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def tearDown(self):
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shutil.rmtree(self.tempdir)
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def test_write_window(self):
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name = os.path.join(self.tempdir, "test_write_window.tif")
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a = np.ones((50, 50), dtype=rasterio.ubyte) * 127
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with rasterio.open(
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name, 'w',
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driver='GTiff', width=100, height=100, count=1,
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dtype=a.dtype) as s:
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s.write(a, indexes=1, window=windows.Window(10, 30, 50, 50))
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# subprocess.call(["open", name])
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info = subprocess.check_output(["gdalinfo", "-stats", name])
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self.assertTrue(
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"Minimum=0.000, Maximum=127.000, "
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"Mean=31.750, StdDev=54.993" in info.decode('utf-8'),
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info)
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def test_block_windows_unfiltered(path_rgb_byte_tif):
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"""Get all block windows"""
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with rasterio.open(path_rgb_byte_tif) as src:
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assert len(list(src.block_windows())) == 240
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def test_block_windows_filtered_all(path_rgb_byte_tif):
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"""Get all block windows using filter"""
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with rasterio.open(path_rgb_byte_tif) as src:
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w, s, e, n = src.bounds
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focus_window = src.window(w, s, e, n)
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filter_func = partial(windows.intersect, focus_window)
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itr = ((ij, win) for ij, win in src.block_windows() if filter_func(win))
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assert len(list(itr)) == 240
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def test_block_windows_filtered_one(path_rgb_byte_tif):
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"""Get the first block windows using filter"""
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with rasterio.open(path_rgb_byte_tif) as src:
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w, s, e, n = src.bounds
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focus_window = src.window(w, n - 1.0, w + 1.0, n)
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filter_func = partial(windows.intersect, focus_window)
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itr = ((ij, win) for ij, win in src.block_windows() if filter_func(win))
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assert next(itr) == ((0, 0), windows.Window.from_ranges((0, 3), (0, 791)))
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with pytest.raises(StopIteration):
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next(itr)
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def test_block_windows_filtered_none(path_rgb_byte_tif):
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"""Get no block windows using filter"""
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with rasterio.open(path_rgb_byte_tif) as src:
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w, s, e, n = src.bounds
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focus_window = src.window(w - 100.0, n + 1.0, w - 1.0, n + 100.0,
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boundless=True)
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filter_func = partial(windows.intersect, focus_window)
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itr = ((ij, win) for ij, win in src.block_windows() if filter_func(win))
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with pytest.raises(StopIteration):
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next(itr)
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def test_block_tiff(path_rgb_byte_tif):
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"""Without compression a TIFF's blocks are all the same size"""
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with rasterio.open(path_rgb_byte_tif) as src:
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block_windows = list(src.block_windows())
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sizes = [src.block(1, i, j)['size'] for (i, j), w in block_windows]
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assert sizes.count(2373) == 1
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assert sizes.count(7119) == len(block_windows) - 1
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