Thanks for everyone for your suggestions. I am trying to use the techniques that you suggested and I will update you its outcome so that it might be useful to other too. Thanks,
On Thu, Oct 13, 2016 at 2:10 PM, Duncan Murdoch <murdoch.dun...@gmail.com> wrote: > On 13/10/2016 11:14 AM, Thomas Adams wrote: > >> Duncan, >> >> Oh, to be sure, with a fair amount of work, you're probably correct that >> one could mash up something. Here are some examples: >> >> http://www.illinoisfloods.org/documents/2013_IAFSM_Conferenc >> e/Conference_Presentations/5C-1_HEC-GeoRAS_Part1.pdf >> <--- lots of graphics >> >> http://rivergis.com/ >> >> also... >> http://www2.egr.uh.edu/~aleon3/courses/Transient_flows/ >> Tutorials/Geo_RAS/georastutorial.pdf >> -- pages 35-> >> https://www.crwr.utexas.edu/reports/pdf/1999/rpt99-1.pdf -- pages 70-> >> (figures 4-17, 4-18), p. 147 >> > > Thanks. I guess it's up to Marna to say whether any of those figures are > like what she wants to produce from her data. > > Duncan Murdoch > > >> Best, >> Tom >> >> On Thu, Oct 13, 2016 at 9:20 AM, Duncan Murdoch >> <murdoch.dun...@gmail.com <mailto:murdoch.dun...@gmail.com>> wrote: >> >> On 13/10/2016 8:35 AM, Thomas Adams wrote: >> >> All, >> >> Very respectfully, there are no R packages that can do what >> Marna desires. >> >> >> I would guess that's not literally true, in that there are several >> graphics packages that are very flexible. You could well be right >> that there are none that are designed specifically for this purpose, >> so she's probably going to have to do some work to get what she wants. >> >> His/Her data, undoubtably, comes from a 1-D hydraulic model >> simulation -- where output is generated at channel >> cross-sections -- representing the sloping water surface >> elevation of the centerline of flow in a stream or river. With >> mapping software for such problems, the assumption is made that >> the water surface intersects the topography (within or beyond >> the stream channel) perpendicular to the direction of flow. >> Hydrodynamically, this is generally not correct, but it's a >> reasonable approximation. To do this, typically, the topography >> -- in the from of a raster digital elevation model (DEM) -- is >> converted to a triangular irregular network (TIN) to facilitate >> the creation of a smoother line of intersection between the >> water surface and topography. Because, the water surface slopes >> in a downstream direction, contour lines are crossed. Hydraulic >> modeling software usually is accompanied by this mapping >> capability, such as with HEC-RAS with RAS-Mapper, developed by >> the US Army Corps of Engineers, or with HEC-GeoRAS, which >> requires ESRI ARC GIS; but, there is also a QGIS plugin module >> that can do this, I believe. These software packages do >> facilitate representing the flow in 3D. >> >> >> Do you know any sample figures online that would show the type of >> graph that is usually used here? >> >> Duncan Murdoch >> >> >> Tom >> >> >> On Wed, Oct 12, 2016 at 6:12 PM, David Winsemius >> <dwinsem...@comcast.net <mailto:dwinsem...@comcast.net> >> <mailto:dwinsem...@comcast.net <mailto:dwinsem...@comcast.net>>> >> wrote: >> >> >> > On Oct 12, 2016, at 4:28 AM, Duncan Murdoch >> <murdoch.dun...@gmail.com <mailto:murdoch.dun...@gmail.com> >> <mailto:murdoch.dun...@gmail.com >> >> <mailto:murdoch.dun...@gmail.com>>> wrote: >> > >> > On 12/10/2016 4:49 AM, Marna Wagley wrote: >> >> Hi R Users, >> >> Is it possible to visualize river flow in 3D (latitude, >> longitude with >> >> respect to depth)? >> >> The example of my data looks like. Any suggestions? >> >> >> >>> dat1 >> >> long lat depth flow >> >> 1 1015.9 857 1.00 1.50 >> >> 2 1015.9 857 1.25 1.23 >> >> 3 1015.9 857 0.50 2.00 >> >> 4 1015.9 858 0.10 1.95 >> >> 5 1015.9 858 0.20 1.50 >> >> 6 1025.0 858 0.30 1.20 >> >> 7 1025.0 858 0.40 0.50 >> >> 8 1025.0 858 0.35 0.70 >> >> 9 1025.0 858 0.24 1.20 >> >> >> >> Thanks for your help. >> > >> > It may be, but it's hard to give a nice looking graphic of >> that >> small dataset. You could try the rgl package and use plot3d >> to >> show spheres with radius depending on the flow rate, for >> example >> > >> > plot3d(cbind(long, lat, depth), type="s", col="blue", >> radius=flow/5) >> >> A complementary option is to install the plot3D package which >> I >> see also has a plot3Drgl "co-package". The advantage to this >> option is the association with beautiful modeling packages >> that >> Karline Soetaert, Peter M. J. Herman, and Thomas Petzoldt have >> been offering to ecologists for the last decade. (Packages: >> deSolve, marelac, seacarb, AquaEnv) A lot of her work has >> been on >> flows within systems. >> >> I usually think of "flows" in rivers as being vector fields >> in an >> incompressible fluid (water) with 6 components per point, >> but you >> can also think of them as being scalar state variables. So I >> suppose you could be modeling something other than mass flows. >> (See Package::ReacTran for the R portal to that mathematical >> world.) >> >> Best; >> David Winsemius >> >> >> > >> > Duncan Murdoch >> > >> > ______________________________________________ >> > R-help@r-project.org <mailto:R-help@r-project.org> >> <mailto:R-help@r-project.org <mailto:R-help@r-project.org>> >> mailing list >> -- To UNSUBSCRIBE and more, see >> > https://stat.ethz.ch/mailman/listinfo/r-help >> <https://stat.ethz.ch/mailman/listinfo/r-help> >> <https://stat.ethz.ch/mailman/listinfo/r-help >> <https://stat.ethz.ch/mailman/listinfo/r-help>> >> > PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html >> <http://www.R-project.org/posting-guide.html> >> <http://www.R-project.org/posting-guide.html >> <http://www.R-project.org/posting-guide.html>> >> > and provide commented, minimal, self-contained, >> reproducible code. >> >> David Winsemius >> Alameda, CA, USA >> >> ______________________________________________ >> R-help@r-project.org <mailto:R-help@r-project.org> >> <mailto:R-help@r-project.org <mailto:R-help@r-project.org>> >> mailing list -- >> To UNSUBSCRIBE and more, see >> https://stat.ethz.ch/mailman/listinfo/r-help >> <https://stat.ethz.ch/mailman/listinfo/r-help> >> <https://stat.ethz.ch/mailman/listinfo/r-help >> <https://stat.ethz.ch/mailman/listinfo/r-help>> >> PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html >> <http://www.R-project.org/posting-guide.html> >> <http://www.R-project.org/posting-guide.html >> <http://www.R-project.org/posting-guide.html>> >> and provide commented, minimal, self-contained, reproducible >> code. >> >> >> >> >> >> >> >> >> > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
