#517: v.net.iso / v.net.alloc: keep original cat values or change output to field in attribute table instead of new map --------------------------+------------------------- Reporter: effilc36 | Owner: grass-dev@… Type: enhancement | Status: new Priority: minor | Milestone: 7.4.0 Component: Vector | Version: svn-trunk Resolution: | Keywords: v.net.iso CPU: All | Platform: All --------------------------+-------------------------
Comment (by mmetz): Replying to [comment:8 mlennert]: > Pinging this after a class where many students thought they did something wrong because the approach using cat values is not very intuitive and is not directly visible. > > I still think that giving the option to write the results as new columns in the attribute file of the network would be a nice feature to have. v.net.iso and v.net.alloc split some of the input lines: if the start node and the end node of a line belong to different classes, that line is split proportional to the cost difference and the two (or more) new lines will belong to different classes. Therefore it is not possible to simply add a new attribute to input lines. What could be done is to add a new flag that 1) creates unique categories and adds an attribute table with class id (iso zone) and distance, 2) copies original arc attributes to a separate layer with some lines sharing the original arc category. -- Ticket URL: <https://trac.osgeo.org/grass/ticket/517#comment:9> GRASS GIS <https://grass.osgeo.org>
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