Add city outline fetcher script

scripts/geojson/fetch_city_outlines.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+json=`curl 'https://wiki.linux-forks.de/mediawiki/api.php?action=query&prop=revisions&rvprop=content&format=json&titles=Maps:Cities'`
+data=`echo $json | json_reformat | sed -e 's/\\\\n//g' -n -e 's/begin:mapdata\([^}]\+\)/\1/gp' | sed -e "s/|-|/}/g"`
+
+echo "["
+export IFS="}"
+for entry in $data; do
+	name=`echo $entry | sed -n 's/\s*\([^|]\+\).*/\1/p' | sed 's/ $//'`
+	type=`echo $entry | sed -n 's/\s*\([^|]\+\)||\s*\([^|]\+\).*/\2/p' | sed 's/ $//'`
+	coord=`echo $entry | sed -n 's/.*||\s*\([^|]\+\).*/\1/p'`
+	if [[ "$name" != "" && "$coord" != "" ]]; then
+		echo "{ \"type\": \"Feature\",
+	\"geometry\": {
+		\"type\": \"Polygon\",
+		\"coordinates\": [[
+			$coord
+		]]
+	},
+	\"properties\": {
+		\"name\": \"$name\",
+		\"type\": \"$type\"
+	}
+},"
+	fi
+done
+export IFS=" "
+echo "{}"
+echo "]"