Tag Archives: CARTODB

Voyant, CartoDB, Palladio:  Comparing Network Analysis Tools

The goal of these three tools is the same to search and assemble large amounts of data into formats which users can easily manipulate to create visualizations of their data.  The goal of these tools is to enhance research and help researchers provide hard data and evidence for their humanities projects.  The tools help us shape new questions and provide additional options for the portrayal of “ideas of change”, show how people, ideas, organizations or events have common patterns and interactions all of which enhance the meaning  and understanding of the data and the humanist’s ability to teach and share the insights from it.

Voyant focuses on text and identified collections.  It inspires thinking into the nuanced meaning and use of words.  This includes the “power words” within a text and also the auxiliary words which demonstrate a deeper level of language use in a particular context.   Although targeted for the “new to digital technology humanist” and straightforward in its process; if one is really new to the processes and navigates off the script or attempts to add something, there are no ‘aids’ built into the system to help you easily answer questions or solve problems.

CartoDB is a network mapping tool or as Carto describes itself, “An open, powerful, and intuitive platform for discovering and predicting the key insights underlying the location data in our world.”  (https://twitter.com/cartodb?lang=en) This is a more sophisticated program for a new user than Voyant because it has more “built in software” making it more accessible.   CartoDB  focus on the spatial aspects of the data – how it is related geographically.  Layers can be added with new information to enhance the understanding of the connections between relationships.  It is easy to switch between and add maps.  Starting with basic geography, but using GIS reference and point placement, CartoDB  makes the maps for you.  It also projects the maps in different ways using widgets: ‘heat maps’ show concentrations of activities and ‘animated’ maps can demonstrate interactions over time and space, or demonstrate patterns and isolations.  This map is very helpful for clear comparisons and relations.

Palladio describes itself a s a “platform” for network analysis.  This platform has a number of tools and is organized around manipulating the corpus data. When I was using this platform, I had the feeling; I was using a very limited aspect of its capabilities.  “It is designed to manipulate data the way historians think” this is useful for us historians who have trouble “organizing our research” in the same ways that Scientists and Social Scientists do. Palladio enables the contents, of seemingly incomparable elements, get turned into plotable graphs, maps and clouds (spatial comparisons for ideas and categories).  Being able to manipulate the data without having to have the underlying programming expertise is magic. However creating the corpus of data becomes highly significant, more on this below.   The user has to ‘trust’ the logic and ability of the programmer (that the description of what is being done with the data – is being done in the same way the historian “thinks” it is being done).  Decisions are made regarding how to organize the data sets.  Errors can result in huge consequences for interpretation.

When computers were first coming into popular use (1970’s & 80’s) the key phrase was GIGO (Garbage In/Garbage Out).   Manipulating research is pretty powerful and the visualizations ‘lock in’ ideas more definitively than ‘discussion’ does.   As I read about and worked with these tools, I was excited about how a project I am working on Women and Health Care in Cleveland would benefit by their use.  The “tools” will provide quick ways to visualize the impact of location and intersecting relationships we have been struggling to describe.  Each tool can help us see the data from a new perspective and solidify, highlight our findings or indicate new questions.  But, these tools cannot fully explain all the “whys” of the locations; the personalities, beliefs,  or causes of actions.  Missing records from whole segments of Cleveland’s population would not be “factored in”.  As I worked with the individual tools, it became evident how each of the projects that used them, needed to modify them to suit their own data and questions.  The itemization of the “Grant Support” is evidence of the need for modification, and support for programmers and editors to work with the researchers so that the questions are being addressed thoroughly and potential problems recognized and documented so that we do not generate (in today’s vernacular) “Fake History”.

Utilizing multiple tools is one way to avoid egregious errors and explore the data more deeply.    Use of Voyant  on the text of the Slave Narratives reflected the use of language which evidenced the fact that the slaves being interviewed were mostly plantation based and isolated.  CartoDB demonstrated that “Alabama” interviews were not conducted all over Alabama, but in pocketed areas.  It also provided evidence that the numbers of interviews peaked in 1937 (but the data did not indicate why).  The similarity and limitations of the script used in the interviews was evidenced in Palladio by a cloud diagram of topics.  These tools provide amazing insights, enable analysis that would not be possible without the speeds of text manipulation and they are great aids to the craft of history.

CARTODB  The Power & Limits of Perspective!

In Women’s Studies, we examine concepts from different points of view.  Engaging in the idea that ‘it matters where you are standing’, because what you are experiencing shapes your interpretation of the problem or context.  Indulging in the examination of a variety of perspectives does not always lead to a conclusion or an answer, but it imparts a fuller and more complex understanding of the issues being addressed.

CARTODB opens the opportunity for novice geeks to play with data and visualize information from a different perspective.  The key word here is “visualize”.  Mapping allows everyone!  (if I were writing a grant I would say, ‘the general public as well as scholars and students’); to “see” human experience in new configurations.  Ideas are sometimes hard to follow, but evidence for an idea can be provided by demonstrating connections and patterns and “placing” the idea onto a map.   A created map is “a map” which displays information, but CARTO has widgets for interactive time sequences, pull ups for additional material or explanations for aspects of the map.  The process of building the map, plugging in ‘layers’ (multiple data sets) of data into a ‘corpus’ (total collection), is exciting for the researcher because it allows them to “play” with ideas!   For example, in analyzing the Slave Narratives using different map views (point identification, “heat” (concentration) or time sequencing) reveals different aspects of the Slave Narrative project – its limitations and biases as well as providing a great deal of information on the slaves and the interviewers.  This type of mass collation and presentation preparation would take years without the speed of computing.  But the computer cannot interpret the meaning of the data.

Mapping allows for the interpretation of large quantities of data, and the consultation of a wider scope of resources. (Tom Hitchcock “Historyonics”).  The caveat being that the data has to be in a digital format, this is a limiting factor and the limitations of whatever ‘data set’ is being used should be recognized.  Sharon Musher (in Oxford Handbook of the African American Slave Narratives) makes an excellent and pertinent reminder of how even a seemingly large and comprehensive set of information can be misleading in its content.  Great questions that mapping answers are locations, patterns and relationships (who is where and when and how does that change over time).  However mapping allows us to see the significance of these relationships in new ways.  As in Digital Harlem, where the placement of a patrol officer on a street corner and involvement in traffic accidents can now be understood as intersections of racial politics. (Robertson).

A bonus is that skeptics of the value of history (like Tom Hitchcock) will have something concrete, built on numerical manipulation that they can “see” as evidence, because ideas may seem too fuzzy for them to comprehend.  CARTODB is a fabulous tool for allowing the explorer of an event, a neighborhood, the spread of ideas globally, the impact of words, or as in the Slave Narratives…the impact of human actions, individually and communally, from more perspectives.

Make no mistake, working with CARTODB is interfacing with computing.  It requires patience for the tedious and repetitive steps of data entry, learning the “tools” and patterns of operations within the program and is never as ‘intuitive’ as the newbie wants it to be.  After my initial foray, I can see, as with my phone and Voyant, the more the platform is used, the easier, more fluid and of course faster the user will become.  I just keep praying that eventually the very act of learning this type of tool will become more fluid.  If you are a person that needs to understand the overall picture of the tool, some time spent in on-line helps and guides is worthwhile.  If you are a person who is a digital native or who doesn’t get frustrated by getting stuck and starting over, dive right in.