fire insurance maps

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Mapping the History of College Point: The Impact of Immigrants on a Neighborhood in Queens

Authored by Megan Smead

Image of Fire Insurance Map of College Point, Queens watermarked with New York Public Library logo

Map of College Point, Queens, NY from the Sanborn Map Company, Atlas 141, Queens V. 5, Plate No. 15, 1903, made available by the Lionel Pincus and Princess Firyal Map Division of the New York Public Library.2

The Sanborn Map Company created fire insurance maps beginning in the mid-nineteenth century, showing the location and construction of buildings and roads in major cities across the United States, which allowed insurance companies to assess fire risk.1 The Lionel Pincus and Princess Firyal Map Division of the New York Public Library has digitized many atlases and maps, including the Sanborn map in Figure 1, which represents College Point, Queens, NY in 1903. As part of an Academic Service-Learning experience through St. John’s University, I georectified this map, and others from the same atlas of Queens. The georectification process entails using the NYPL Map Warper tool to match coordinates from the historical map to a current map in order to align the two maps. Georectification of historical maps allows genealogists, historians, architects, urban planners and members of the public to observe geographic and demographic changes over time, and to make connections to the past. Volunteering my time and skills in service to the public by georectifiying maps allows me to strive towards fulfilling the Vincentian mission of service that is essential to St. John’s University. Continue reading →

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“Warping” through Queens history with the NYPL Map Warper tool

insurance maps of the borough of queens, vol 2, 1915

Insurance Maps of the Borough of Queens, City of New York, Volume Two, published in 1915 and digitally reproduced on the NYPL Map Warper according to a CC0 1.0 license.

Authored by Maddy Vericker

The NYPL Map Warper is a collection of New York-area maps and atlases that have been digitized and published online under a Creative Commons CC0 1.0 Universal Public Domain Dedication license.[1] The coolest thing about the Map Warper tool is that it is also a crowdsourcing project that relies on volunteers to pin old maps to modern satellite maps, a process called georectification.[2]  Exploring the maps that populate the website reveals much about the history of a city that is constantly evolving, and in researching the Sanborn Map Co.’s Insurance Maps of the Borough of Queens, City of New York, Volume Two,[3] these changes are even more apparent. Continue reading →