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Visualizing UFO sighting data. by Kelly Bryant and Helen Kim. The Data Source. The NUFORC (National UFO Reporting Center) website collects and posts UFO sightings in the United States and around the world: http://www.nuforc.org. Their Data. - PowerPoint PPT Presentation
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by Kelly Bryant and Helen Kim
Visualizing UFO sighting data
The Data Source
• The NUFORC (National UFO Reporting Center) website collects and posts UFO sightings in the United States and around the world:
• http://www.nuforc.org
Their Data
The UFO sighting data are shown in tables on the website indexed by:
• EVENT DATE • STATE • SHAPE OF UFO • DATE POSTED• Hard to see any patterns in this data,
especially changes over time and how these relate to the other dimensions
Their Data
Narrowing ScopeNumber of sightings per state:
http://www.nuforc.org/webreports/ndxloc.html
Data Problems
If this database were really to provide accurate visualizations, the following columns needed to be cleaned up:
• Shapes
• City, State
• Time/Date, Duration
• Summary Descriptions
Shapes:
• We grouped several UFO shapes together because of similarity:– Circle, sphere, round, oval, egg– Cylinder, cigar– Triangle, delta, pyramid, cone– Flare, flash, fireball
City, State:
• Mix-ups between CA state and Canadian reports
• Additional location data found in City field:– Examples:
• “Mendocino (approximately 15 miles south of Mendocino)”
• “near I-5”• “Between Gaviota and Lompoc”
Time/Date, Duration:• Time/Date, Duration data may be unreliable• Hard to show data up to the minute,
especially since duration time varies greatly as well
• Examples of “Duration”:– “One Minute”– “25-30 sec”– “Rock Climbing”– “Sunset”
of 2000
2001
2000
of 2000
2001
of january
februarydecember
january 2000
of 2000
of january
of the 21st
20th 22nd
21st
of 2000
2001
of january
februarydecember
january 2000
of january
februarydecember
january 2000
of 2000
of january
februarydecember
january 2000
of 2000
Design issue:
18 distinct colors
Design issue: time
of 2000
2001
2000
toggle timeline
Design issue: time
stacked timeline
Design issue: time
stacked timeline
January 14 2002 3:00pm
Design issue: time
pop-up timeline
Design issue: time
fisheye timelinejanuary 19, 2002 at 1:00pm
Design issue: time
of 2000
2001
2000
toggle
stacked
pop-up
fisheye
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