1wxGUI.vnet(1) Grass User's Manual wxGUI.vnet(1)
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7 vector, network, vector
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10 Vector Network Analysis Tool is graphical front-end for v.net* modules.
11 It allows perform network analysis directly in wxGUI without need to
12 use command line. The tool can be launched from Layer Manager menu Vec‐
13 tor → Network analysis → Vector network analysis tool or
14 from Map Display toolbar Analyse map → Vector network analysis
15 tool .
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17 Subsets for nearest centers (v.net.alloc)
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19 Vector Network Analysis Tool currently allows you to:
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21 · perform these network analyses:
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23 · Shortest path (v.net.path)
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25 · Salesman (v.net.salesman)
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27 · Flow (v.net.flow)
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29 · Allocate subnets for nearest centers (v.net.alloc)
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31 · Steiner tree for the network and given terminals
32 (v.net.distance)
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34 · Splits net by cost isolines (v.net.iso)
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36 · show and set all data needed for the analysis (points,
37 attribute tables, compute costs)
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39 · show analysis results (maps and it’s attribute tables)
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41 · snapping to nodes
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43 · browse previous analysis results
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46 The tool is split into tabs. Every tab represents some functionality:
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48 Parameters tab
49 It is used for setting vector map and it’s layer on which analysis
50 will be done. Also it is possible to set columns with cost values
51 from attribute table connected to particular layer.
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53 Points tab
54 It manages points, which are used for analysis.
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56 Output tab
57 There is a output console, which shows information about running
58 analysis.
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60 Input tables tab
61 When existing vector map and it’s existing layers are set in Param‐
62 eters tab, this tab is dynamically added. It shows attribute tables
63 of node and arc layers, which were chosen for analysis. It is also
64 possible to compute cost values in this tab. This can be done by
65 right mouse button click on column label. Then from pop-up menu
66 choose Add column, where new column for cost values can be created.
67 After that by right mouse button click on the added column label
68 can be chosen item Field calculator. This tool computes cost val‐
69 ues.
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71 Result tables tab
72 The result of vector network analysis is always a vector map. Some
73 vector network analysis results can also include attribute tables.
74 If such a table is connected to the result map, this tab is shown
75 and with it you can browse the data.
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78 When some change is done in layer tree of Map Display, temporary vector
79 map representing result of analysis is not rendered (use Show result
80 button in toolbar to render it again).
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83 wxGUI
84 wxGUI components
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86 See list of vector network modules.
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88 See also the user wiki page including video tutorial.
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91 Stepan Turek, Google Summer of Code 2012 (mentor: Martin Landa)
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93 $Date: 2018-10-14 21:39:26 +0200 (Sun, 14 Oct 2018) $
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96 Available at: wxGUI Vector Network Analysis Tool source code (history)
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98 Main index | Wxgui index | Topics index | Keywords index | Graphical
99 index | Full index
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101 © 2003-2019 GRASS Development Team, GRASS GIS 7.6.0 Reference Manual
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105GRASS 7.6.0 wxGUI.vnet(1)