The first tax mapping originated in the 1670s in Boston where the assessors listed assets and value. In the early stages of development, these maps detailed the metes and bounds of each property. They were drawn manually and many times were printed on animal skin (vellum) or linen fabric…Today, the use of digital tax mapping performed with Computer Aided Design/Drafting (CADD) and more recently, Geographic Information Systems (GIS), has advanced the tax map system in both practicality and accuracy. Read more here.