City Control Points

Note to surveyors: to convert from the former Northampton Coordinate System to NAD27 datum add N469,700 and E264,000 to the Northampton coordinates.  Note, however, that many of the surveys using that former system have been found to be inaccurate.  See the above report on the Assessment of Historic Northampton Coordinate system, but note that surveyors using the city system often added their own errors.