Set Distance/Angle Limits
First, the StructureNetwork must be defined by selecting AssetGroup and AssetType. Allowed line features that are assignable as containment are listed in an info pane. If no parameterization can be found for the selected combination, a warning is displayed.
The automatic generation is based on geometric intersections. If line geometries of different lengths are found in a section, the section is split accordingly. This is repeated until all sections contain only lines of identical length. These sections are the geometric basis for the creation of the StructureLine. Only line features that are detected as approximately parallel are considered.
For which length difference lines can be considered as identically long depends essentially on the underlying data. This value can be adjusted individually. As a rule, parallel lines are not recorded in a precise position on a map. To ensure the readability of the map, they are fanned out. The greater the fanning, the greater the differences in length may be. In particular, if the route runs at a right angle, for example. With five parallel lines generated at a distance of 1 m, the difference in length between inside and outside lines can quickly add up to many meters. The same is true for parallelism. Only lines that are considered parallel may be considered. This is done by specifying an angle.
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With parallel distances of a maximum of 0.30 m and 6 lines involved, good results were obtained in almost all route sections with a distance of 0.5 to 1.0 m, and an angular deviation of 20°. Larger distance values can be expected with larger parallel distances. More frequent individual situation adjustments of the parameters are also to be expected. The results will be better, the more real the position of the lines was captured. As expected, the results become worse with large fanouts. |
Specify Search and Route Width
A width must be specified for the route generation. In practice, this corresponds to a trench width, for example. Due to the fanning out of the parallel lines, it may be necessary that lines - running outside the route width in the map - should also be included in the calculations. This is achieved by specifying a larger search width.
Check Vicinity
Before the actual calculation, the approximate course of the connected route sections is visualized on the map. The user can abort the calculation if it is recognized that adjustments to the calculation parameters are still necessary. It is not always clear in the map section whether a line feature is inside or outside the route section. If the vicinity check is activated, a parallel calculation is performed internally with slightly enlarged input parameters. If additional lines are found here, a warning is issued. The calculation can be aborted and re-initiated with a larger search distance.
Edit Route Section
If the Edit Route Section switch is activated, the created route sections are loaded into the editor. However, it is also possible at any time to select any route sections on the map and load them into the editor for editing.
Start Calculation
The calculation is performed along a predefined geometric course. This can be freely determined in the map by a sketch tool. Alternatively, the geometric course can be set to by selecting line features on the map. A continuous line geometry does not necessarily have to be selected here. The calculation is performed over all geometries found.
The Create button is enabled when a geometry is known. This can be used, for example, to cancel a calculation based on a sketch and start it again.
