Tag: map preservation

Multispectral Analysis Reveals Lost Details on a 16th-Century Portolan Chart

Published on by Jonathan Crowe
Excerpt from an enhanced version of Bartolomeu Velho’s portolan chart of the east coast of North America, ca. 1560. Compare with the original. Library of Congress.

The Library of Congress reports on how its Preservation Research and Testing Division used multispectral imaging to bring out previously illegible place names on a 16th-century portolan chart of the east coast of North America. Initially the PRTD was brought in to confirm that the chart was legit before the Library purchased it (which it did last fall), but the faded iron gall ink in some areas of the map suggested obscured details that further analysis could draw out and place names that could be made legible again. According to the article, this represents the first time the Library has posted an enhanced image of one of their holdings.

BNSF’s Map Archives

Published on by Jonathan Crowe

BNSF is one of the largest railways in North America. It’s the end product of a series of rail mergers, and as such it has records for all its antecedent railroads. Including, as an item posted to its website this month reveals, maps, which BNSF is now in the process of digitizing.

Some of the most historically significant maps that BNSF has are maps filed by our predecessor railroads. These maps depicted the beginning of the railroad as we know it, and were often the first official survey of some of the more remote areas of the developing West.

Many of our vital maps were found in boxes or stashed in file cabinets or storage rooms. “We went to 200-plus locations going through thousands, if not tens of thousands of boxes,” said Obermiller of the conversion. “Now we are preserving the most vital maps to ensure we are retaining our vital records and are good stewards of our heritage.”

No word in the piece as to whether those records are available to researchers or the public.