ETO's Map of Science collects and organizes the world’s research literature, revealing trends at the cutting edge of science and technology. The Map organizes hundreds of millions of articles from around the world into over 85,000 clusters, or groups of articles that cite each other often - typically because they share other things in common, such as topic or language. (Learn more about research clusters.) The Map also includes data about each cluster’s growth over time and about the key topics, countries, authors, and funders of the articles within the cluster.
You can use the Map to:
For more caveats about the data used in the Map, refer to the documentation for the source datasets.
No, other than the names of some researchers (all taken from public documents).
Please cite "ETO Map of Science" and include a link to the tool.
These instructions focus on the desktop version of the tool. Some features may be missing or act differently on mobile devices.
The Map of Science tool has four different views:
Map view, which is the default for the desktop version. Map view isn’t available on mobile devices.
List view, which is the default on mobile.
Summary view, which summarizes displayed clusters when filters are applied.
Cluster detail view, which can be opened by clicking on a specific cluster in the map view or list view.
If you’re using a desktop browser, opening the Map will bring you here first. This view is built around a visualization of over 85,000 research clusters, each represented by a single dot on the Map. Clusters spaced closer together have more inter-cluster citation links (that is, citations by articles in one cluster to articles in the other). The color of each dot indicates the most common general subject category (for example, biology, social sciences, or medicine) among articles in the cluster from the last five years; larger dots represent clusters with more papers added in the past five years.
To winnow down the Map, use the left-hand filter menu. Hover over the "?" icons to learn more about what each filter means.
As you work with filters, click the "Apply filters" button to apply them. Clusters that don’t match the filters will disappear from the Map, which will automatically rescale around the ones that remain. If you’d prefer to keep all of the clusters visible, use the "Display Unselected" switch.
On the right side of the Map, you'll see summary information for all clusters meeting the current set of filters. If you hover over an individual cluster, summary details for that cluster will also appear in the right-hand pane. Click the "More details" button to jump to summary view, or click on an individual cluster to bring up its detail view.
Click and drag to zoom in on a portion of the Map. To access more controls, navigate to the top right corner of the window.
The list view shows each cluster as a row in a table. Use the left-hand filter pane to narrow the table to clusters that meet your filters. To learn more about what the filters mean, hover over the "?" icons.
You can add or remove columns with the "Add/Remove Columns" button. Most of the available filters can also be displayed as columns.
By default, the clusters are listed in descending order by growth rate. You can reorder the table by any column with an arrow icon in ascending or descending order.
Click on a cluster to bring up its detail view.
As you filter the Map, summary view will show you aggregated information about the group of clusters that meet the filters you've applied, such as growth, concepts, languages, prominent articles, and countries. (Here, and generally in ETO resources, we use "country" informally, as a shorthand term for sovereign countries, independent states, and certain other geographic entities. Read more >>) Use the left-hand menu to navigate between different sections.
The cluster detail view is structured similarly to the summary view and includes similar information, but is focused on the specific cluster you've selected (rather than all of the clusters that meet specified filters). Compared to the summary view, the cluster detail view also includes some extra data relevant only to individual clusters, such as cluster-level growth prediction and citations to and from other clusters. Use the left-hand menu to navigate.
As you use the Map of Science, your browser’s address bar will update to reflect the view and filters you've selected. At any time, copy the URL from the address bar to return to the same page later.
Explore research on any topic, from the general to the very specific. The Map includes searchable filters for hundreds of high-level concepts and fields of study. Tinkering with these filters can lead you to clusters of research about highly precise concepts - everything from robots that grow like vines to speech recognition in noisy environments.
Show me research...
Learn about the key countries, researchers, institutions, and articles in specific areas of research using the Map’s browse and detail view modes.
Identify the research topics with the fastest growth, most citations, and other measures of impact.
Build powerful, complex filters to quickly zero in on the most relevant topics and actors with the Map’s easy-to-use filtering interface.
Since the Map’s launch in October 2021 as a CSET prototype, researchers at CSET and elsewhere have used it to:
Beyond these public examples, users in and out of government consult the Map in decisions related to science and technology policy, diplomacy, industrial policy, national security, and other domains.
We’ll add new public examples here as we learn about them.
Researching individual people or articles. You can’t search the Map for individual people or articles. The Map does include some of this information in the detail view for each cluster, to provide context to that cluster, but in order to view it, you have to have first selected that cluster for other reasons (for example, because it meets criteria you specify with filters). In other words, it’s better to first look for particular types of research using the Map’s filters, then browse information about the people and articles related to that research - not the other way around.
Tracking trends over time in the composition of a specific field or cluster of research. The Map provides a current "snapshot in time" of research. You can see which fields have grown fastest overall (as of the time of that snapshot) using the Map’s growth filters, but you can’t currently see how an area of research has evolved over time in terms of participants or funders (for example). It may be possible to approximate some such analyses with careful combinations of filters and cluster details, but the Map isn’t currently designed to support these analyses.
Studying topics unlikely to show up in public literature, such as classified government research or commercially sensitive R&D. The Map relies entirely on public documents, such as published articles, preprints, and conference papers and may not give a good view of other, non-public types of research.
Drawing definitive conclusions about Chinese research trends. Because the data sources for the Map omit many Chinese-language publications, you should use particular caution when interpreting data from the Map related to Chinese research institutions, funders, or authors.
All of the data used to generate the Map of Science comes directly from the Research Cluster Dataset, which is itself based on the Merged Academic Corpus. These datasets aren’t publicly available, but you can learn more about them on their documentation pages:
The Map interface is updated intermittently as new features are developed. The underlying cluster structure and metadata are updated roughly quarterly; see the Research Cluster Dataset documentation for more details.
Use our general issue reporting form, or click on the "Submit feedback" icons embedded in the tool to report issues related to specific data points.
Many of the algorithms and metrics used in the underlying corpus were developed by SciTech Strategies. Dewey Murdick conceived of and started the Map of Science effort and has informed the design and initial requirements. Ilya Rahkovsky designed and implemented an initial Tableau interface that informed the design of the first version of the Map of Science, as well as taking a leading role developing an initial set of clusters. Katherine Quinn updated the set of clusters and methodology starting in 2023.
Jennifer Melot, Neha Singh, and Brian Love developed the Map of Science user interface and contributed to its current design in collaboration with Zach Arnold.
Dewey Murdick, Catherine Aiken, Autumn Toney, and Sara Abdulla contributed feedback and ideas on the user interface. Neha Singh, Brian Love, Ashwin Acharya, Catherine Aiken, Zach Arnold, Miguel Camargo, Jack Corrigan, Brian Hayt, Patrick Lee, Maya Mei, Jennifer Melot, Igor Mikolic-Torreira, Mina Narayanan, Avital Percher, George Sienawski, Alex Stevens, Dan Stubbins, Helen Toner, Bryan Ware, and Molly Wasser provided review and testing.
Zach Arnold wrote this documentation.
|10/6/21||Initial release (CSET prototype)|
|10/19/22||ETO initial release|
|5/19/23||Summary view integrated|
|5/19/23||New filters added to interface (author organizations, funder examples, AI safety)|