CNHRPC maintains and archives many different GIS data sets and maps for the region. Much of this data is available for download NH GRANIT (see link below). If you have any particular data needs not available at NH GRANIT or the other links below, feel free to contact a CNHRPC GIS staff person and ask about availability.
UNH Complex Systems (GRANIT)
Environmental Systems Research Institute (ESRI)
Northeast ARC Users Group (NEARC)