20260204 13254000 1.0 ISO 19139 Metadata Implementation Specification FALSE EAD_AirQualityHourlyData 002 20251107 10302300 20251107 10302300 Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.1.14362 EAD_AirQualityHourlyData File Geodatabase Table dataset EAD_AirQualityHourlyData Table 1420 OBJECTID OBJECTID OID 4 0 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. StationName StationName String 50 0 0 StationAlias StationAlias String 50 0 0 RecordedDate RecordedDate String 50 0 0 Hour Hour String 50 0 0 ObservedAt ObservedAt Date 8 0 0 AQIIndex AQIIndex String 50 0 0 PM10 PM10 Single 0 0 0 PM25 PM25 Single 0 0 0 O3 O3 Single 0 0 0 SO2 SO2 Single 0 0 0 NO2 NO2 Single 0 0 0 CO CO Single 0 0 0 AQI AQI SmallInteger 2 0 0 20251107