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Category: 21st century cartography

Three maps of Japan that shows the distribution of earthquakes.

Mapping Magnitude: The Evolution of Earthquake Maps

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 …

Detail of printed map of Florida. The Everglades bear the label "Extensive inundated region covered with pine and hummock islands, of all sizes, and generally called The Ever Glades."

Swampland in Florida

Posted by: Amelia Raines

Recently I came across an interesting map of Florida in our collections. Dated 1823, the map was made only four years after the territory of Florida was ceded to the United States by Spain, and 22 years before it became a state in its own right. The map, authored by surveyor Charles Vignoles and engraved …

Map of Washington DC in various colors indicating the grade of the streets.

Visualizing DC’s Municipal Infrastructure,1890 to 2022

Posted by: Meagan Snow

Maps can tell us all kinds of things about how others have viewed and shaped the world – from the borders of ancient empires to the layout of your neighborhood street grid. Today, spatial data commonly powers the maps and applications we use to access basic information about the places we inhabit: opening an app …

Brown, red, and yellow tinted map illustration of the continents of Europe, Asia, Africa and Australia, with a circular frame around them

LC Maps for Robots

Posted by: Julie Stoner

This is a guest post by Rachel Trent, Digital Collections and Automation Coordinator in the Geography and Map Division. Interested in bulk downloading maps from the Library of Congress’s online collections? Need a corpus of historical map images to build a training dataset for your machine learning model? Looking to learn more about Python or APIs? Curious …