Tag 'railway:signal:combined:shortened = no'

Value histogram for key 'source'

• 14: bing; estimate; survey
• 12: survey
• 11: estimate; extrapolate; survey
• 5: bing; estimation; survey
• 4: estimate; survey
• 4: estimation; survey
• 1: extrapolate; survey
• 1: estimation
• 1: extrapolation; estimation; survey
• 1: bing; survey