The 33 code scheme for this update includes codes 23,24,29,30,31,32,33,34,35,36 and 37 in addition to the original 21 codes. The minimum mapping unit used was one acre. These towns that have been updated are listed below . The process of combining the data from different years created some 'sliver polygons'. These result when a theoretically coterminous line in each coverage is actually offset due to it having been digitized twice, e.g. the shore of a lake.
Some slivers remain.
They have the correct coding, but should actually be merged with an adjacent polygon. This item uniquely identifies each polygon within the state. For older land use codes, see the section Historical Land Use . Further information on them can be obtained from Professor William MacConnell at the Dept. of Forestry, University of Massachusetts, Amherst. A statewide version of the LUS.PHS table is also maintained and is stored in the Town library's 'database' workspace.