EDUCATIONAL The Arc/Node Model: How GIS Knows What Connects to What Every road that meets another road, every parcel that touches its neighbour, runs on a hidden network only GIS can see. 31 May 2021•4 min read• TITrishunya India Share: WhatsApp Copy Link Previous Cylinder, Cone, or Flat Plane: How Projections Get Built Next Mercator to UTM: The Grid That Quietly Runs the World Back to all articles ×