Hi I just saw your article about the slope overlay. Wow! Very well done. It's a great summary of all the different methods for risk delimitation.
http://www.mendiak.net/foro/viewtopic.php?p=604256 Oliver > 2013/3/12 Oliver Eichler <[email protected]> >> >> Well the current scheme matches the warning levels / slopes used in the >> Alps. If you have another scheme I can add it. >> >> But even without a matching scheme as a rule of a thump everything more >> than 29° is potentially dangerous. >> > > Uf! we are recreational ski-tourers. Thought we don't use a 'Physical' DAV > snow card , we follow essentially the same process to evaluate the risk, > based on the well known *Basic reduction method* as a starting point > > As I have been using for years a home-made scale with the maps (1) to know > how steep the slope is, I have been doing the same manual process in QLGT > using the polyline tool to take the mesurement between contour-lines, > ....but this is laborious. > > Now, with the new slope layer in QLGT, this job is quite easy, and in > addittion you can get an overall sight of the slope. > > The dynamic dialog showing the resulting numeric values in degrees is > really useful in order to prepare the tour at home. IMHO it can be used > to get a more precise value about how steep the slope is, rather than a > go/stop traffic-light. All this with the logical limitation due to maps and > dems resolutions. > > On the technical aspect: I have tried the slope layer with > > - 15x20m DEM covering the central section of the Pyrinees (21Mb) > - 50x50m DEM covering Spain made by Jose Luis Domingo (126Mb) > - 5x5m covering Basque Country (1,3 Gb ) > > added to both raster and .img local maps. QLGT works well with all of them, > and when I change the risk level on the dial, the map refresh with no delay. > > Thanks ! > > (I have some work now to comment about this useful feature in some > spanish mountain forums) > > -------------------- > (1) If anyone is interested on the home made scale it is available at > *http://aldatseskala.blogspot.com.es/2009/03/lista.html* > with instructions in basque, spanish, and french (excuse me for the lack of > english, deutsch...) > I hope it will be useful accompanying to the map, when going out on tour > ;-) > > > > ------------------------------------------------------------------------------ > Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester > Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in the > endpoint security space. For insight on selecting the right partner to > tackle endpoint security challenges, access the full report. > http://p.sf.net/sfu/symantec-dev2dev > > > > _______________________________________________ > Qlandkartegt-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/qlandkartegt-users > ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_mar _______________________________________________ Qlandkartegt-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/qlandkartegt-users
