Air Quality Prediction Model Based on Spatiotemporal Data Analysis and Metalearning

Table 2

Data details.

Attribute		Number of different items
		Beijing	Tianjin	Shenzhen	Guangzhou
Time span		2014/5/1-2015/4/30	2014/5/1-2015/4/30	2014/5/1-2015/4/30	2014/5/1-2015/4/30
AQIs		278023	189604	88139	281436
Station ID		36	27	11	42
Major pollutants	PM10	278023	189604	88139	281436
	NO2
	CO
	O3
	SO2
Historical weather	District ID	17	20	7	5
	Basic weather	116867	106614	30305	55632
	Temperature
	Pressure
	Humidity
	Wind speed
	Wind direction
Weather forecast	District ID	17	20	6	5
	Basic weather	390702	361624	106380	51870
	Wind strength
	Wind direction