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57 lines
2.0 KiB
Python
57 lines
2.0 KiB
Python
import logging
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import pytest
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import subprocess
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import sys
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import rasterio
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logging.basicConfig(stream=sys.stderr, level=logging.DEBUG)
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# When possible, Rasterio gives you the CRS in the form of an EPSG code.
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def test_read_epsg(tmpdir):
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with rasterio.drivers():
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with rasterio.open('tests/data/RGB.byte.tif') as src:
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assert src.crs == {'init': 'epsg:32618'}
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def test_read_epsg3857(tmpdir):
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tiffname = str(tmpdir.join('lol.tif'))
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subprocess.call([
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'gdalwarp', '-t_srs', 'EPSG:3857',
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'tests/data/RGB.byte.tif', tiffname])
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with rasterio.drivers():
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with rasterio.open(tiffname) as src:
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assert src.crs == {'init': 'epsg:3857'}
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# Ensure that CRS sticks when we write a file.
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def test_write_3857(tmpdir):
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src_path = str(tmpdir.join('lol.tif'))
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subprocess.call([
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'gdalwarp', '-t_srs', 'EPSG:3857',
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'tests/data/RGB.byte.tif', src_path])
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dst_path = str(tmpdir.join('wut.tif'))
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with rasterio.drivers():
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with rasterio.open(src_path) as src:
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with rasterio.open(dst_path, 'w', **src.meta) as dst:
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assert dst.crs == {'init': 'epsg:3857'}
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info = subprocess.check_output([
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'gdalinfo', dst_path])
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assert """PROJCS["WGS 84 / Pseudo-Mercator",
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GEOGCS["WGS 84",
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DATUM["WGS_1984",
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SPHEROID["WGS 84",6378137,298.257223563,
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AUTHORITY["EPSG","7030"]],
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AUTHORITY["EPSG","6326"]],
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PRIMEM["Greenwich",0],
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UNIT["degree",0.0174532925199433],
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AUTHORITY["EPSG","4326"]],
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PROJECTION["Mercator_1SP"],
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PARAMETER["central_meridian",0],
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PARAMETER["scale_factor",1],
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PARAMETER["false_easting",0],
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PARAMETER["false_northing",0],
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UNIT["metre",1,
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AUTHORITY["EPSG","9001"]],
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EXTENSION["PROJ4","+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs"],
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AUTHORITY["EPSG","3857"]]""" in info.decode('utf-8')
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