| # GRASS Help System

node - In GRASS, vector data are stored in an arc-node representation. An arc (vector) is stored as a series of x,y coordinate pairs. The arc's end-points are called nodes. Two consecutive x,y pairs define an arc segment (line segment). Arcs, either singly or in combination with other arcs, form higher-level map features: line features (e.g., roads or streams) and area features (e.g., soil types or timber-cutting units).

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Automatically created on: Thu Mar 16 08:45:11 2006