Tag 'railway:signal:combined:shortened = yes'

Value histogram for key 'source'

• 12: estimate; extrapolate; survey
• 8: bing; survey
• 7: bing; estimate; survey
• 6: extrapolation; survey
• 5: bing; estimate; extrapolate; survey
• 4: bing;estimate;extrapolate;survey
• 4: survey
• 2: bing; estimation; survey
• 2: estimate; survey
• 1: bing; extrapolation; survey
• 1: estimation; survey