What is a Geographic Information System?
GIS stands for geographic information system. A GIS is made up of digital map layers, each with an underlying database. Each map layer has real world coordinates so that layers can be overlaid to view map layers in relation to other map layers. Each layer's database contains information about the map features in that layer. For example, the streets map layer contains information about whether a street is paved or unpaved. This information is stored in the database for each street. Database information can be queried or used to color-code the map. In addition, external databases can be joined to a map layer so that additional information can be displayed on a map. GIS is intelligent mapping.
The maps and data displayed on this site are for reference and planning purposes only. Users of this site are hereby notified that the primary information sources should be consulted for the verification of the information contained on this map. The Town of Grafton and its mapping contractors assume no legal responsibility for the information contained herein. Parcel data displayed on this site is updated annually on July 1st.