#82: new module: v.to.3d --------------------------+------------------------------------------------- Reporter: hamish | Owner: martinl Type: task | Status: assigned Priority: major | Milestone: 6.4.0 Component: Vector | Version: svn-develbranch6 Resolution: | Keywords: Platform: Unspecified | Cpu: Unspecified --------------------------+------------------------------------------------- Comment (by martinl):
Replying to [comment:6 martinl]: > Replying to [comment:5 hamish]: > > Replying to [comment:3 martinl]: > > > I am not sure which module to use for reverse transformation > > > (3D->2D). > > > > points, centroids: v.out.ascii | v.in.ascii (without -z or z=). then you'd need to copy+merge tables adding in the new z column. > > > > polyfeatures: v.out.ascii format=standard | awk to strip away the third column | v.in.ascii format=standard. I think layer/cat setting at end of each feature is ok as it is always like "1 1", never a third column. > > AFAICT there's no way to keep the data in that 3rd column, as a line can only hold a single attribute/cat. the user can summarize with v.univar if they want that...? > > this approach will be very slow for large vector maps... That's reason why I would prefer to implement it in GRASS C module. Another option would be to rewrite v.to.3d in C. -- Ticket URL: <http://trac.osgeo.org/grass/ticket/82#comment:7> GRASS GIS <http://grass.osgeo.org>
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