heliwatch/heliwatch/fetch_data.sh

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#!/usr/bin/env sh
set -e
overpass() {
curl -X POST -d "data=[out:json];$1" -o $2 http://overpass-api.de/api/interpreter
}
bbox="51,13,52,15"
Q=""
for level in 6 7 8 9 10 11 ; do
Q=$Q'way["boundary"="administrative"]["admin_level"="'$level'"]('$bbox'); relation["boundary"="administrative"]["admin_level"="'$level'"]('$bbox');'
done
if [ ! -e locations.json ]; then
F=$(mktemp)
overpass "($Q); out body; >; out skel;" $F
mv $F locations.json
fi
if [ ! -e aircraftDatabase.csv ]; then
F=$(mktemp)
curl https://opensky-network.org/datasets/metadata/aircraftDatabase.csv -o $F
mv $F aircraftDatabase.csv
fi