Hi,
Profile tool would help, I don't know qprof. You could always try a classic
cost path raster analysis using the grass or saga module available in
processing. That would give you the easiest route between 2 points.
For something like what you have on the link, I have not seen this on
Qgis. The easiest way would be to draw the lines, densify the geometry,
extract the nodes into points, then use the point sampling tool to get some
values.
If you want to extract slope, you would need to make a slope analysis on the
raster and extract those value with the point sampling tool. You could
then show these points along the line using the values with a color scale. If
you extract the road names at the same time as the point slope values, then you
could make a xtab and get to stats (mim,max,avg) for each roads. (The
point sampling tool can extract values from vectors or raster layers.)
Cheers.
Nicolas
On Apr 5, 2016 2:31 AM, "trenti76 [via OSGeo.org]"
<[email protected]> wrote:
Hi.
I want to create a road/path slope map.
I have the road on .shp file polylines and elevations from .DEM. I want to know
the slope of every section (between two nodes). Really I want know the best
route (minimum slope) between two points or draw the road and view the slope of
each section.
I try with profile tool and qprof tool, but I'm thinking about any like
that:
https://www.arcgis.com/home/item.html?id=a4bda006f2f64b03b8803443d4970ae3
Any way easy to do that? Any tool? I search for info and read any post, but
anyone do a easy way.
Thanks
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