ISSS608 2018-19 T1 Assign Qiao Xueyu Visualization

 Air Polution in Sofia, Bulgaria

Overview

Data Preparation

Visualization Design

Insights

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Official Air Quality Measurements

	The Map shows the distribution of official stations. Hover the mouse over each flag to get detailed information Click the flag on the dashboard to highlight the Hourly Trend of this selected station
	The Hourly Trend graph shows the average hourly PM10 concentration of each station. Hover the mouse over each dot to see the average concentration during a certain time period Slide the sidebar to select the year to view Select the standard deviation from the drop-down list Click the station names to highlight the station location on the Map Parameter created: Standard Deviation: to control the number of standard deviation Calculation Fields created: Upper Bound: to draw the upper bound Lower Bound: to draW the lower bound Outlier: to judge whether a value exceeds the bounds
	The Overall Trend graph shows the trend of each station according to the date granularity selected. Click the blue boxes to adjust the date granularity The reference line shows the value of 50 which is the EU hourly standard PM10

Citizen Science Air Quality Measurements

	The Coverage Map shows the citizen sensors' coverage. The color of circles shows the percentage of anomalies with red indicating high percentage of anomalies The size of circles shows the number of measure records Click from the Anomalies list to select the well-operated or badly-operated sensors Click the play button to view the animation of sensors' operation over the months Click the red circles to view the anomalies details on the Anomalies graph and the location on the Concentration Map Hover the mouse over each circle to view the average hourly PM10 and PM2.5 concent
	The Anomalies graph shows the number of anomalies and the percentage of anomalies over the time period. Hover the mouse over each dot to view the detail of anomaly Click a certain dot to view the coverage of that particular day Click a certain dot and select True from the Anomalies list, and hover the mouse over the circles on the Coverage Map to view the anomaly details
	The PM10 & PM2.5 Heatmap shows the concentration change over the time period. Click the play button to play the animation

Air Quality & Other Factors

	The graph on the left helps us to explore the relationship between PM10 concentration and attributes of them like distance to curb, distance to building and altitude. Click the name of each station to highlight the other graph Slide the slider to view the values of different years
	The line charts of meteorological variables help us explore the relationship between meteorological factors and pollutant concentration.