About the New Hampshire Railroad Map

The map of New Hampshire railroads is intended to depict the railroad system in New Hampshire at its fullest extent. Within the boundaries of New Hampshire all common carrier railroads should be shown though in a few cases parallel tracks may not show as two distinct lines. Logging railroads are shown where it has been possible to locate them from old U.S. Geological Survey maps. Unfortunately many logging railroads only existed for periods of time that were shorter than the USGS's revision cycle and thus were never documented by the USGS. No interurban or street car lines are shown.

How the map was created

The map was created using data from the U.S. Geological Survey (ftp://edcftp.cr.usgs.gov/) as a starting point. This data is NOT in the form of images but instead in the form of line plots. This data comes as as separate files for railroads, roads and trails, hydrography, hypsography (topography) and miscellaneous transportation features. Most of the data is from the 1980s so includes about as many railroads as it is missing, as abandoned railroads are only infrequently shown. To put together the abandoned railroad lines a number of different steps were taken: This process has worked quite well but anyone who knows the rail network well will immediately notice that there are lots of missing pieces in the areas outside of New Hampshire. The process is rather tedious so we have not gotten there. Outside of New Hampshire the concentration was on showing lines that connect to New Hampshire but we still have a few lines to locate. Three are noteable:

Railroad Ownership

The ownership of the railroad lines is based on a map issued by the New Hampshire Railroad commission in 1894. The one exception to this is the Eastern Railroad is shown as a separate company.