On Mon, 2007-08-20 at 12:58 -0700, Dylan Beaudette wrote: > On Sunday 19 August 2007 18:22, Helena Mitasova wrote: > > Profiles that you may get from real time kinematic survey or single > > beam sonar > > have similar problem as contours with points being much denser along > > the profile compared > > to the distance between profiles, but they would require > > generalization in vertical plane rather > > than the horizontal plane. > > This might not be the best place to start a thread on this... However, I will > be working on some RTK-based DEM creation stuff, and was about to ask the > list for some pointers on planning out the survey.
Dylan, you can write me directly - we have done quite a bit of work on the design of RTKGPS surveys (and while looking for a paper for you to look at I realized that probably the most interesting part of it we have never published - apparently we should do it). The survey design matters a lot - we have sampled high resolution lidar-based DEM with various combinations of profiles to find out the best combination - I can write you more or find the relevant presentation if you are interested, here are some papers with related info: http://skagit.meas.ncsu.edu/~helena/publwork/papers/Freeman03.pdf http://www.geodynamicsgroup.com/jockeysridge.html http://skagit.meas.ncsu.edu/~helena/gmslab/papers/reveeg20.pdf http://skagit.meas.ncsu.edu/~helena/gmslab/papers/JRGeomorph2005.pdf (see fig 3A) Helena > > Dylan > > _______________________________________________ grass-dev mailing list grass-dev@grass.itc.it http://grass.itc.it/mailman/listinfo/grass-dev
