Difference between revisions of "Vector network analysis"

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Vector directions are defined by the digitizing direction (a-->--b). Both directions are supported, network modules provide parameters to assign attribute columns to the forward and backward direction.
 
Vector directions are defined by the digitizing direction (a-->--b). Both directions are supported, network modules provide parameters to assign attribute columns to the forward and backward direction.
  
* see the {{cmd|vectorintro.html}} vector map processing and network analysis] help page
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* see the {{cmd|vectorintro}} "vector map processing and network analysis" help page
  
  

Revision as of 09:47, 14 January 2009

Vector network analysis

GRASS provides support for vector network analysis using the DGlib Directed Graph Library.

The following algorithms are implemented:

Vector directions are defined by the digitizing direction (a-->--b). Both directions are supported, network modules provide parameters to assign attribute columns to the forward and backward direction.

  • see the vectorintro "vector map processing and network analysis" help page


Shortest path routing

New ideas

Screenshots


v.net.iso - Split net to bands between cost isolines (direction from centre). Costs of centre node are used in calculation.


v.net.alloc - Allocates subnets for nearest centres (direction from centre). Costs of centre node are used in calculation.


d.path - Find shortest path for selected starting and ending node.