venv/bin/python3 exfiltrate.py \
  https://wmts.nlsc.gov.tw/wmts/nURBAN2/default/EPSG:3857/ \
  --zoom 20 \
  --referer https://maps.nlsc.gov.tw/ \
  --bbox 25.076387 121.68951 25.068282 121.700175 \
  --dl-threads 30 \
  --output ~/Downloads/wmts-output/ \
  --download-loops 2 \
  --convert