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Posted by: Carissa Pastuch
This is a guest post by Jackie Coleburn, Rare Book Cataloger at the Library of Congress. Did Philip Lee Phillips study Peter Parley geography books when he was a child? This is a detail of his personal history we may never know. Philip Lee Phillips (1857–1924) was the first Superintendent of Maps when the Hall …
Posted in: American History, Guest Posts
Posted by: Cynthia Smith
During the 19th century Paris underwent a major urban renewal. I am focusing on some of the maps that were published before, during, and after the renovation of Paris. Before the renovation, the residents of central Paris suffered from cholera epidemics, overcrowding and a high infant mortality rate. The Bievre River, which flowed into the …
Posted in: 19th century cartography, City Histories, European History
Posted by: Carissa Pastuch
This is a guest post by Rachel Trent, Digital Collections and Automation Coordinator in the Geography and Map Division. The image below is of a TIFF file, but not just any TIFF. Hidden inside are coordinates that bind the image to a specific place on Earth. For every pixel in the image, an estimated latitude …
Posted in: Geographic Information Science, Guest Posts
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: Carissa Pastuch
In 1899, British geologist Henry G. Lyons (1864–1944) began a systematic reassessment of the cadastral surveys conducted in Egypt under Ottoman Turkish rule. His updated survey was built upon 90 years of work—starting in 1813 when Muʿallim Ghali, a finance minister appointed by Muhammad ʿAli Basha (1769–1849), reorganized the finances of Egypt to optimize taxation. …
Posted in: 20th century cartography, Middle East and North African History
Posted by: Amelia Raines
This afternoon, please join Geography and Map Division staff for a virtual orientation focused on maps and genealogy! Date: Tuesday, April 11, 2023 Time: 3:00-4:00 pm (Eastern) Location: Zoom Register for this session here! Reference librarians Amelia Raines and Julie Stoner will present an introduction to the Library of Congress Geography and Map collections. This orientation session …
Posted in: Events, Geography and Map Division
Posted by: Amelia Raines
In 1798, James Rennell, an English cartographer primarily known for his maps of British territories in India and South Asia, published A map shewing the progress of discovery & improvement, in the geography of North Africa. This map combined geographical information gathered from sources spanning more than 1.5 millennia, from recent explorers all the way …
Posted in: 18th century cartography, African History, European History, Exploration
Posted by: Sonia Kahn
This post recounts the author's personal experience working in the Geography and Map Division and serves as a goodbye to both the Division and the readers of the Worlds Revealed blog.
Posted in: Geography and Map Division