changes in the spatial distribution of ozone in texas from weekdays to weekends
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Changes in the Spatial Distribution of Ozone in Texas from Weekdays to Weekends. Gookyoung Heo Environmental & Water Resources Engineering Program, Department of Civil Engineering, University of Texas at Austin. Air Quality & GIS. Complex and Comprehensive Data - PowerPoint PPT PresentationTRANSCRIPT
Changes in the Spatial Distribution of Changes in the Spatial Distribution of Ozone in Texas fromOzone in Texas from
Weekdays to WeekendsWeekdays to Weekends
Gookyoung HeoGookyoung HeoEnvironmental & Water ResourcesEnvironmental & Water Resources
Engineering Program, Department of Civil Engineering, Engineering Program, Department of Civil Engineering, University of Texas at AustinUniversity of Texas at Austin
Air Quality & GISAir Quality & GIS Complex and Comprehensive DataComplex and Comprehensive Data Frequent relocation of monitoring stationsFrequent relocation of monitoring stations Frequent irregular short-term or long-term Frequent irregular short-term or long-term
missing datamissing data Spatial Distribution (Characteristics of Air Spatial Distribution (Characteristics of Air
Pollution)Pollution) This Study: Weekday-Weekend Differences ofThis Study: Weekday-Weekend Differences of Ozone Distribution (With Ozone Distribution (With Application of Arc Hydro)Application of Arc Hydro)
DATADATA EPA-AIRSEPA-AIRS (Big Raw Data Files: X00 MB) (Big Raw Data Files: X00 MB) TNRISTNRIS Texas State, Counties (Shape files)Texas State, Counties (Shape files) Time Series Data (Processed)Time Series Data (Processed) *ArcGIS, ArcHydro-Compatible Format*ArcGIS, ArcHydro-Compatible Format Spatial and Temporal Data (Location, TimSpatial and Temporal Data (Location, Tim
e)e)
Extracting from the Raw Extracting from the Raw DataData
TSDateTimeTSDateTime Julian Day, Specific Format Julian Day, Specific Format (MM/DD/YYYY HH:mm:ss): DateTime(MM/DD/YYYY HH:mm:ss): DateTime EX) August 1, 1998, 8 AM.EX) August 1, 1998, 8 AM. 08/01/1998 08:00:0008/01/1998 08:00:00 Make Data in This Format (How?)Make Data in This Format (How?)
TSDateTimeTSDateTime Julian Day, Specific Format Julian Day, Specific Format (MM/DD/YYYY HH:mm:ss): DateTime(MM/DD/YYYY HH:mm:ss): DateTime EX) August 1, 1998, 8 AM.EX) August 1, 1998, 8 AM. 08/01/1998 08:00:0008/01/1998 08:00:00 Make Data in This Format (How?)Make Data in This Format (How?)
TSType (Day of Week)TSType (Day of Week)
TSType (ID for the subgroups)TSType (ID for the subgroups) Weekdays, Weekends (SUN, SAT)Weekdays, Weekends (SUN, SAT)
TSType (Day of Week)TSType (Day of Week)
TSType (ID for the subgroups)TSType (ID for the subgroups) Weekdays, Weekends (SUN, SAT)Weekdays, Weekends (SUN, SAT)
Year,Month,Day,Hour
Julian Day from a Starting Day
Day of Week (Accumulated Julian Day/7)
: If the starting day is Monday,
MOD (Accumulated Julian Day, 7)= ?MOD(Monday, 7) =1MOD(Sunday, 7) =0
TSType (Day of Week)
TSType (Day of Week)TSType (Day of Week)
Adding the Time Series Adding the Time Series Data and Monitoring Data and Monitoring
Station DataStation Data
Get the Spatial Get the Spatial InformationInformation
Joining
Displaying the Joined Displaying the Joined DataData
Future WorkFuture Work Removing Flaws in the Prepared DataRemoving Flaws in the Prepared Data Spatial and Temporal Analysis of Spatial and Temporal Analysis of
Ozone Data of Texas during the Peak Ozone Data of Texas during the Peak Ozone Months (Summer)Ozone Months (Summer)
Spatial Interpolation (If appropriate)Spatial Interpolation (If appropriate) Weekday-Weekend DifferencesWeekday-Weekend Differences
Thank you!Thank you!Comments!Comments!