Opened 11 years ago
Last modified 5 years ago
#1852 new enhancement
r.profile: accept lines vector map as profile
| Reported by: | dericke | Owned by: | |
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| Priority: | normal | Milestone: | 7.6.2 |
| Component: | Raster | Version: | svn-trunk |
| Keywords: | r.profile, elevation | Cc: | |
| CPU: | All | Platform: | All |
Description
r.profile should directly accept a lines vector map and optional selection query. For each line feature returned, an elevation profile is created that runs along all vertices of the line.
This would be great for profiling a complex river or road without the intermediate step of converting vertices to ASCII before they can be used in r.profile. It would also aid in quickly profiling multiple transects.
Change History (15)
comment:1 by , 11 years ago
| CPU: | Unspecified → All |
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| Platform: | Unspecified → All |
| Version: | unspecified → svn-trunk |
comment:2 by , 11 years ago
comment:3 by , 11 years ago
The function which could be added to r.profile is sample_raster(), see
http://trac.osgeo.org/grass/browser/grass/trunk/vector/v.drape/main.c#L29
follow-up: 5 comment:4 by , 8 years ago
| Milestone: | 7.0.0 → 7.1.0 |
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Given the fact that nor v.split or v.to.points are helpful to generate reasonable input for r.profile, this enhancement is quite useful. At time I don't see how to extract nodes from a vector line at defined distance.
comment:5 by , 8 years ago
Replying to neteler:
Given the fact that nor v.split or v.to.points are helpful to generate reasonable input for r.profile, this enhancement is quite useful. At time I don't see how to extract nodes from a vector line at defined distance.
maybe some inspiration?:
https://grass.osgeo.org/grass70/manuals/addons/v.fixed.segmentpoints.html https://grass.osgeo.org/grass70/manuals/addons/v.transects.html
comment:6 by , 8 years ago
An alternative could be to enhance the GRASS add-on v.profile (at time it allows to profile vector maps). Might be the "natural" place...
https://grass.osgeo.org/grass70/manuals/addons/v.profile.html
comment:9 by , 7 years ago
| Milestone: | 7.2.1 → 7.2.2 |
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comment:10 by , 7 years ago
| Milestone: | 7.2.2 → 7.4.0 |
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All enhancement tickets should be assigned to 7.4 milestone.
comment:12 by , 6 years ago
| Milestone: | 7.4.1 → 7.4.2 |
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comment:13 by , 6 years ago
| Milestone: | 7.4.2 → 7.6.0 |
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All enhancement tickets should be assigned to 7.6 milestone.
Hi,
it seems like a reasonable idea, probably waits for someone to work on it.
note that for the ASCII work-around that v.out.ascii has an option to output to stdout and r.profile can take input from stdin, so with a little UNIX powertool magic (grep, awk, or sed) you could do it all in one step, maybe with a small wrapper script or alias.
see also the v.drape module which may do some of what you want.
Hamish