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Historical Data Visualization Examples

7/21/2015

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Historical Data Visualization Examples

Although the term data visualization often makes one think of colorful charts from Excel or interactive infographics, simpler forms have been around for centuries. Some of the first data visualizations examples would have been done in clay, rock or even sand, dating back thousand of year, according to DataArt . Maps became the main subject for data visualization for many years, using mediums such as papyrus.

In 7 Great Data Visualization Examples from History , Michael Goldberg explains several pre-technology data visualization examples hold a special place in history because the authors had to hand code and design each one. One of those included Dmitri Mendeleev, who developed the Periodic Table. It was significant in that it showed all the elements could be combined into one table by atomic structure instead of separated by atomic weight or common properties.
periodic table data viz
In 1869, Charles Minard created a graphic showing Napoleon’s campaign and retreat in Russian. The multivariate data presented includes the size of the army, the army’s location, direction of the army’s movement and temperatures on certain dates. Edward Tufte describes it as being possibly the “best statistical graphic ever drawn.”

Napoleon data visualization
Mapping deaths from cholera, John Snow was able to visually display that the Broad Street water pump may have been the source of the outbreak in 1854. Although he was not the first to map the epidemic, he was the first to use the underlying scientific theory for cholera’s transmission in this historical data visualization example.
cholera death historical data visualization
Florence Nightingale used visual illustrations for data she felt could not be “readily grasped when contained in figures” in her campaign for more sanitary conditions and quality care for soldiers. She was able to communicate the great number of soldiers were dying due to conditions rather than their war wounds through this historic data visualization example.

army cause of mortality historical data visualization
One of the first examples of stereograms is Luigi Perozzo’s Numero Assoluto dei Nati Vivi, which moved into 3D imagery. Several 3D data visualization systems were discovered during the last 1800s. Perrozzo’s diagram illustrates the population of Sweden from 1750 to 1875 and was published around 1880. Further notability came from it being printed in color which enhanced the depth perception. DataArt explains that the diagram shows year horizontally, number of individuals vertically and age groups by depth.
historical 3d data visualization
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Free data visualization tools on the web

7/17/2015

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Free data visualization tools on the web

Many data visualization tools can be found on the web. Some will cost you a pretty penny but many are free. One free data visualization tool is the open-source javascript library Leaflet . Full of mobile friendly interactive maps, Leaflet describes itself as “designed with simplicity, performance and usability in mind.” The web site is complete with tutorials, links to plugins to expand its basic abilities, and download page for various versions.
free data visualization
Leaflet map
Google Developers Charts offers a variety of charts in a gallery and has a quick start guide. With 28 types of charts, maps, word trees and timelines, users can find the best way to display their information using this totally free data visualization tool.
Google charts
Word tree example from Google Charts
Another free, open source data visualization javascript library for interactive map-making is Polymaps . This site offers data visualization techniques including spherical Mercator tile format, multi-zoom datasets over maps and tiled vector data which makes it possible to use on country, state, city, or neighborhood levels.
free data visualization tools
Polymap of pavement quality in San Francisco
Small and specifically designed for vector graphics, Raphaël is a javascript library designed to make cross-browser compatibility easy. The site provides animation demos and free icons but is more hands-on that other tools.
data visualization tool
Other free data visualization tools and techniques available on the web can be found in The 37 best tools for Data Visualization .

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What is data visualization and is it important?

7/14/2015

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What is data visualization and is it important?

Presenting data in a visual form such as a chart, graph or picture is SAS Institute’s definition of data visualization. The analytics software and service company’s What is data visualization web page explains that human brains process charts and graphs faster than spreadsheets or reports. Yet, many still find charts and graphs boring. Enter interactive data visualization offering more details and changing the ways data is viewed. Users can click on parts of the visual to find more information and remain interested.

Data visualization is important because it often allows people to see things which were not apparent before they viewed the data in a visual presentation. Patterns emerge that are not as visible on a spreadsheet and the data can be consolidated regardless of the amount.

spatial data visualization
SAS does offer advice for generating the best data visualization possible. One tip is to know your audience and how your audience processes information. Second, understand the data and what you want to communicate. Third, choose the best but simplest form to convey your visual information.

All that is great for a business but what is data visualization for the average Joe? If the data exists, it can be made visual whether for use or entertainment. WebdesignerDepot .com offers 50 Great Examples of Data Visualization , including some of the data visualization tools that create them. For example, Narratives 2.0 creates music visualization.

music data visualization
Tag Galaxy allows the user to search Flickr tags and view all images via a globe graphic. Viewers can see a larger version by clicking on a picture.

pitcure data visualization
Visualizing the Bible provide a visual representation of 63,000 textual cross-references in the Bible. It is more for its attractive appearance and is not interactive.

music data visualization
Finally, Visual Complexity is a collection of visualizations categorized and ready for viewing. For example, one contributor created a summary of his son, daughter, cat and his own movements through their living room over one hour in 2008.

data visualization map
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