Methods, systems, and computer-readable and executable instructions are described herein. One method includes identifying a number of structural rules of an area utilizing a map of the area, determining a placement for each node of a number of nodes of a node network on the map of the area utilizing a node placement model, identifying a placement of a node among the number of nodes that deviates from a structural rule among the number of the structural rules, and providing an indication of the node on the map of the area.