47 lines
1.2 KiB
Python
47 lines
1.2 KiB
Python
import urllib.request
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import zipfile
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import os
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import sys
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SRTM_DIR = '/home/slin/enduro-trails/data/srtm'
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BASE_URL = 'https://srtm.kurviger.de/SRTM3/Eurasia'
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tiles = []
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for lat in [54, 55, 56]:
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for lon in range(41, 47):
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tiles.append(f'N{lat}E{lon:03d}')
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os.chdir(SRTM_DIR)
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count = 0
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for tile in tiles:
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hgt = f'{tile}.hgt'
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if os.path.exists(hgt):
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print(f' EXISTS: {hgt}')
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continue
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url = f'{BASE_URL}/{tile}.hgt.zip'
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tmp = f'/tmp/{tile}.hgt.zip'
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try:
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print(f' Downloading {tile}...', end=' ', flush=True)
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urllib.request.urlretrieve(url, tmp)
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if os.path.getsize(tmp) > 0:
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with zipfile.ZipFile(tmp, 'r') as z:
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z.extractall('.')
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os.remove(tmp)
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size = os.path.getsize(hgt) if os.path.exists(hgt) else 0
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print(f'OK ({size // 1024}KB)')
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count += 1
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else:
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print('EMPTY')
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os.remove(tmp)
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except Exception as e:
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print(f'FAIL: {e}')
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if os.path.exists(tmp):
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os.remove(tmp)
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print(f'\nDownloaded: {count} new files')
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print(f'Total HGT: {len([f for f in os.listdir(".") if f.endswith(".hgt")])}')
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