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Posted by: Meagan Snow
This blog posts provides an introduction to some early maps produced from images captured by ERTS-1 (later known as Landsat I), the world's first earth-observing satellite.
Posted in: 20th century cartography, Big Data and Visualization, Geographic Information Science
Posted by: Meagan Snow
How have national and global populations been mapped over time? This blog post uses collection items from the Geography & Map Division at the Library of Congress to explore changing methods for mapping populations, from census-based thematic maps to modern population raster datasets.
Posted in: Big Data and Visualization, Geographic Information Science
Posted by: Tim St. Onge
Our new interactive map showcases the Climatological Database for the World's Oceans 1750-1850, an exciting digital acquisition of the Library of Congress.
Posted in: Big Data and Visualization, Exploration, Geography and Map Division
Posted by: Sonia Kahn
Did you know that worldwide, roughly 55 earthquakes are recorded per day? Of course, the vast majority of these seismic events are minor, making it all the more impressive that we are able to detect them. The technology used to gather data on earthquakes and seismic movements has vastly improved over time, and with it …
Posted in: 19th century cartography, 20th century cartography, 21st century cartography, Big Data and Visualization
Posted by: Meagan Snow
The end of the 19th century saw a rise in the proliferation of data visualizations alongside traditional cartography and thematic mapping. A terrific example of this type of work is Scribner’s Statistical Atlas of the United States, which “shows by graphic methods [the states’] present condition and their political, social, and industrial development.” The atlas …
Posted in: 19th century cartography, American History, Big Data and Visualization
Posted by: Meagan Snow
Have you ever wondered how historic maps can be used with today’s modern mapping technologies? One of the ways in which analog maps can be used with GIS (Geographic Information Systems) is through a process called georeferencing. Georeferencing is the process of adding digital spatial reference information to an otherwise non-spatial image. Adding spatial reference …
Posted in: Big Data and Visualization, Geographic Information Science
Posted by: Julie Stoner
You are invited to join the Library of Congress in celebrating GIS Day on Wednesday, November 18th from 1-4pm EST, with an afternoon of engaging talks and discussions on the theme of “Mapping the Pandemic Cases, Traces, and Mutations.” This presentation will premiere with closed captions on both the Library’s YouTube site and on the Library …
Posted in: Big Data and Visualization, Events, Geographic Information Science
Posted by: John Hessler
This is a special Women’s History Month guest post by Giselle Aviles, the 2019 Archaeological Research Associate in the Geography and Map Division. Giselle interviews Dr. Paulette Hasier, the first woman to serve as Chief of the Geography and Map Division since it was founded late in the nineteenth century. On one of my breaks from …
Posted in: Big Data and Visualization, Geographic Information Science, Guest Posts, Women's History
Posted by: John Hessler
Today’s post is the eighth in a year-long series called,”Computing Space,” which highlights new mapping technologies and new areas for cartographic innovation, along with stories of the lives and work of many of the mostly unknown cartographers, geographers, mathematicians, computer scientists, designers and architects who both now, and in the past, have had a hand …
Posted in: Big Data and Visualization