Timeline for How to calculate line complexity index
Current License: CC BY-SA 4.0
6 events
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| Sep 12, 2019 at 13:48 | answer | added | robin loche | timeline score: 1 | |
| Sep 12, 2019 at 9:36 | comment | added | geozelot |
as an addition to the sinuosity; you should be able to use ST_SetEffectiveArea to derive statistics about a lines per-vertex curvature; it's a common simplification method, but it's values can be used to measure curvature properties.
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| Sep 12, 2019 at 8:19 | comment | added | Babel | And still another approach, depending on how detailed your data is: simply count the number of vertices (per distance): a straight-line section will contain much less vertices than a curved road. For other solutions, google for sinuosity and the tool you want to use (i.e. PostGIS/PostgreSQL) | |
| Sep 12, 2019 at 8:12 | comment | added | Babel | I don't have a solution, but maybe an idea to build on if you would also be willing to work with QGIS: you could try to measure angles at each vertex with the expression-editor and the angle_at_vertex function. You could add all the values (be aware how to deal with positive and negative values) and relate the result to the total length. Like this you get a measure for the sinuosity of the road. Of course, you could simple calculate the proportion of total road-length to the length of a straight line from the beginning to the end (first to last vertex) of your line. | |
| Sep 12, 2019 at 8:12 | comment | added | Bera | You could compare line length to euclidian distance from startpoint to endpoint. But that might be over simplifying it | |
| Sep 12, 2019 at 7:40 | history | asked | DavidP | CC BY-SA 4.0 |