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import os.path
import subprocess
import tempfile
import rasterio
import rasterio.shutil
with rasterio.Env():
with rasterio.open('tests/data/RGB.byte.tif') as src:
b, g, r = (src.read(k) for k in (1, 2, 3))
meta = src.meta
tmpfilename = os.path.join(tempfile.mkdtemp(), 'decimate.tif')
meta.update(
width=src.width/2,
height=src.height/2)
with rasterio.open(
tmpfilename, 'w',
**meta
) as dst:
for k, a in [(1, b), (2, g), (3, r)]:
dst.write(a, indexes=k)
outfilename = os.path.join(tempfile.mkdtemp(), 'decimate.jpg')
rasterio.shutil.copy(tmpfilename, outfilename, driver='JPEG', quality='30')
info = subprocess.call(['open', outfilename])
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