mirror of
https://github.com/rasterio/rasterio.git
synced 2025-12-08 17:36:12 +00:00
58 lines
1.6 KiB
Python
58 lines
1.6 KiB
Python
import os
|
|
import shutil
|
|
import subprocess
|
|
import tempfile
|
|
|
|
import numpy
|
|
import rasterio
|
|
from rasterio.warp import reproject, RESAMPLING
|
|
|
|
tempdir = '/tmp'
|
|
tiffname = os.path.join(tempdir, 'example.tif')
|
|
|
|
with rasterio.drivers():
|
|
|
|
# Consider a 512 x 512 raster centered on 0 degrees E and 0 degrees N
|
|
# with each pixel covering 15".
|
|
src_shape = (512, 512)
|
|
src_transform = [-256.0/240, 1.0/240, 0.0, 256.0/240, 0.0, -1.0/240]
|
|
src_crs = {'init': 'EPSG:4326'}
|
|
source = numpy.ones(src_shape, numpy.uint8)*255
|
|
|
|
# Prepare to reproject this rasters to a 1024 x 1024 dataset in
|
|
# Web Mercator (EPSG:3857) with origin at -8928592, 2999585.
|
|
dst_shape = (1024, 1024)
|
|
dst_transform = [-237481.5, 425.0, 0.0, 237536.4, 0.0, -425.0]
|
|
dst_crs = {'init': 'EPSG:3857'}
|
|
destination = numpy.zeros(dst_shape, numpy.uint8)
|
|
|
|
reproject(
|
|
source,
|
|
destination,
|
|
src_transform=src_transform,
|
|
src_crs=src_crs,
|
|
dst_transform=dst_transform,
|
|
dst_crs=dst_crs,
|
|
resampling=RESAMPLING.nearest)
|
|
|
|
# Assert that the destination is only partly filled.
|
|
assert destination.any()
|
|
assert not destination.all()
|
|
|
|
# Write it out to a file.
|
|
with rasterio.open(
|
|
tiffname,
|
|
'w',
|
|
driver='GTiff',
|
|
width=dst_shape[1],
|
|
height=dst_shape[0],
|
|
count=1,
|
|
dtype=numpy.uint8,
|
|
nodata=0,
|
|
transform=dst_transform,
|
|
crs=dst_crs) as dst:
|
|
dst.write_band(1, destination)
|
|
|
|
info = subprocess.call(['open', tiffname])
|
|
|