[GRASSLIST:508] Re: LRS

[Radim Blazek]

On 3/31/06, Laurent C. <lrntct at gmail.com> wrote:
> 2006/3/31, Radim Blazek <radim.blazek at gmail.com>:
>
> > I would like to include my implementation of LRS
> > (lineare reference system) which was available here
> > http://mpa.itc.it/radim/lrs/index.html
> > in standard GRASS distribution.
> >
> > The LRS supports georeferencing of points and segments
> > given by linear feature, e.g. a road and a position on the
> > linear feature in real world for exemple km+meters.
> > It can also do reverse task, that means to report linear feature
> > and position (road nr., km+m) for point (near the road).
> >
> > I have a question about terminology, I am in doubts how to call
> >
> > 1) The value specifying certain fix point in real world, e.g.
> >   milepost, milestone. The point has usually a physical representation
> >   but I mean the value it represents i.e. mile, kilometer,
> >   not the physical object.
> >
> > 2) The value which specifies the distance along a linear object
> >     from 1) (from milepost) to a certain position on the linear feature.
> >     The distance is given for example in meters or feets.
> >
> > 3) How to call the module which generates labels of existing LRS
> >     Here is example of a map with labels and strokes generated
> >     byt this module:
> http://mpa.itc.it/radim/lrs/stationing-small.png
> >
> > I hope that native english speakers and people working with LRS can help.
> >
> > Thanks
> > Radim
> >
>
> Hello,
> Good job, LRS is very interesting. Maybe I'm wrong, but may it be usefull
> for one-dimensional hydraulic/river modelling ? Strokes could be
> cross-sections with associated profile. I'm thinking about river modelling
> software like FEQ or HEC-RAS.
> http://www.hec.usace.army.mil/software/hec-ras/
> http://il.water.usgs.gov/proj/feq
>  http://www.iqdotdt.com/

I worry that LRS is far from anything like that, it just creates points/segments
for given stationing.

Radim

> 3) v.lrs.label ?
>
> Thanks
> Laurent