Node

A Node item is a topological Point item.

Node items are automatically created at all junctions, intersections and ends of Link items.

• Angle: _angleDeg#
  The angle of an item in degrees.
  
  
• Automatic: _bAuto&
  Was the Node item automatically created? Automatic Node items may be automatically deleted in future when associated Link items are edited or deleted.
  
  
• Blocked Links: _blocks$
  A space-separated list of blocked Link items on a Node item. Blocked Link items are used for Node junction information.
  
  
• Edge: _bEdge&
  Is this Node an edge Node?
  
  
• Geometry class: _classGeom$
  The C++ class used to store an item's geometry. This is handled automatically. You can see what precision an item's geometry is stored with by recognising the geometry classes.
  
  
• Links: _links$
  

  A list of integers describing the Link items used by this Node, TopoPolygon or TopoLineString item.

  Node:

  A space-separated list of integers representing the Item IDs of links connected to this node.

  A positive value indicates a link entering the node. A negative value indicates a link leaving the node.

  e.g. -70 71 -79 80

  TopoLineString:

  A space-separated list of integers representing the Item IDs of links which constitute this TopoLineString.

  The first integer is always 1. The second integer represents the number of links which constitute the TopoLineString. Subsequent integers represent the Item IDs of the links themselves. A negative integer means the direction along the link is opposite to the sense in which it is constructed.

  e.g. 1 6 195 -183 161 -187 197 -189

  TopoPolygon:

  A space-separated list of integers representing the Item IDs of links which constitute this TopoPolygon.

  The first integer is the number of loops in the TopoPolygon. The second integer represents the number of links in the first or only loop. This is followed by the Item IDs of the links which constitute the first or only loop.

  Any remaining integers represent further sets of “number of links/Item IDs”.  There are as many “number of links/Item IDs” sets as there are loops in the TopoPolygon. A negative integer means the direction of the TopoPolygon boundary along the link is opposite to the sense in which the link is constructed.

  e.g. 3 3 238 -226 -224 4 235 218 -188 214 2 -194 -203
  
  

• Number of blocked Links: _nBlock&
  The number of blocked Link items on a Node.
  
  
• Number of links: _nLink&
  The number of Link items associated with a Node item.
  
  
• TopoPoints: _topoPoints$
  

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