IS428 AY2019-20T1 Assign Ronald Lay Answers

VAST Challenge 2019: Mini-Challenge 1

Problem & Tasks

Data Analysis & Transformation

Interactive Visualization

Answers

Q2: Use visual analytics to show uncertainty in the data. Compare the reliability of neighborhood reports. Which neighborhoods are providing reliable reports? Provide a rationale for your response.

Measure reliability among neighbourhoods

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  Figure 2.1 - Overall intensity readings over time period

Based on Figure 2.1, there are 3 key analysis:

• Downtown, Northwest and Weston provide the most reliable reports among all the neighborhoods
• Wilson Forest provides the least reliable reports. It is possible Wilson Forest has experienced the earthquake
• As highlighted in oval red, there are occasional periods where there are simply no reports. The possible cause may point to power/server outages

Need to add more here

Delayed reports

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  Figure 2.1 - Delayed reporting

Power outages and other infrastructural problem result in delayed reports (Indicated by red ovals) and the server does not process the information until the power is restored. The explanation of number annotation is as followed:

• 1 & 2: It is noticeable the reported damage is on different timing. The timestamp is only recorded when the power is restored as resulting in an increase of the amount of damage reports from Thursday 3 to 5 PM due to accumulation of reports over the period of power outages.

Delayed reports per neighbor

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  Figure 2.2 - Delayed reporting per neighbour

Based on the break down by each neighbor, the highlighted red box shows there is indeed a sudden increase in number of reports posted on the server at the same time. The main contributors are Broadview, Chapparal, Old Town and Scenic Vista.