HIG’s Digital Map Project at the Library of Congress

In 2014 HIG was selected by the Library of Congress to digitize a significant portion of their unique fire insurance map (FIM) collection, making many of these maps electronically available in color for the first time. The collection includes approximately 1.5 million original maps from all 50 states. HIG will initially be digitizing approximately 500,000 maps that are free of copyright restrictions and date back to 1867 through the early 1970s. In addition, this project adds real estate atlases for entire cities, including less developed areas not typically mapped by fire insurance maps companies.

The Library of Congress fire insurance map collection was first scanned in black and white during the early 1990s. However, technology has advanced considerably since then, which is why the Library of Congress recently made it a priority to preserve their maps in color. The project will use high resolution imaging techniques to preserve these valuable hand drawn maps for future researchers. Digitizing these maps in color will allow those who visit the Library of Congress to see details and read text that was previously not visible on the black and white scans. HIG is proud to be chosen to complete this project, which is one of the largest color imaging projects ever undertaken by the Library of Congress.

Throughout the course of the digitization project, the color maps are being incorporated into our in house historical map collection and are available for purchase from HIG.

Would you like to see if maps are available for a specific property? Click here to be directed to our new historical map research website.

The newly available color and detail on these digitized maps will show users:

  • Consistently legible text and map symbols
  • Historical property usage
  • Building construction materials
  • Building changes and land use changes in cities and neighborhoods

Take a look at the level of detail shown on the two fire insurance maps to the right. These samples show the same area of Reno, Nevada in 1918 and again 31 years later in 1949.

Digital, Print and Georeferenced Maps

HIG is offering copies of these color fire insurance maps in printed format and a variety of digital formats. For example, HIG has already completed several georeferencing projects covering large urban areas and even entire cities. We used color fire insurance maps to create multiple sets of georeferenced maps, one set for each year of map coverage. These maps are used by government planning and development agencies as well as environmental professionals conducting Area-Wide Brownfield Assessments. These assessments are eligible for EPA grant money that is set aside to identify and prioritize properties within neighborhoods or along commercial corridors for cleanup and redevelopment.

For more info about our experience with Area-Wide Assessments and Corridor Studies, read about our GIS services.

HIG plans to georeference maps digitized during this project to make them easy-to-use with existing computer mapping systems. As buildings, properties and cities change over the years, these old maps need to be georeferenced using common landmarks that are also present on current maps or aerial photographs. This allows the maps to be used as historic map overlays that provide more spatial accuracy and less distortion of scale.

HIG is committed to helping you uncover information that is as accurate as possible and to help you build a detailed history of property uses. If you are interested in purchasing large sets of digital maps, please contact HIG President David Hodnefield at 952-253-2004 ext. 111 or davidh@historicalinfo.com.