[Qgis-user] cross section from raster-data

[Alister Hood]

Sorry,

> -----Original Message-----
> From: Alister Hood
> Sent: Friday, 16 September 2011 8:40 p.m.
> To: 'qgis-user at lists.osgeo.org'
> Cc: 'lsc at ruhrverband.de'
> Subject: [Qgis-user] cross section from raster-data
> 
> Hi Lars,
> 
> > Date: Fri, 16 Sep 2011 07:45:54 +0200
> > From: Lars Schw?tzer <lsc at ruhrverband.de>
> > Subject: [Qgis-user] cross section from raster-data
> > To: qgis-user at lists.osgeo.org
> > Message-ID: <4E72E292.5050201 at ruhrverband.de>
> > Content-Type: text/plain; charset=ISO-8859-15; format=flowed
> >
> > Hi List,
> >
> > I want to calculate a cross section along a line from a raster-data.
In
> > the best way I get a Chart [Coords from the line] / [value of
raster].
> > Is there a way to do this automaticly with Qgis?
> >
> > Regards,
> > Lars
> 
> There are several options:
> 1) The "profile" plugin allows you to draw a straight line on the map
and plots
> the profile of up to three one-band rasters.  The raster CRS must be
the same
> as the project CRS (unless on-the-fly projection is disabled).

The first one is actually called the "terrain profile" plugin.

> 2) The "profile from line" plugin generates a layer of points spread
along the
> lines (or just the selected lines) in a polyline layer.  At each point
it
> samples any number of one-band rasters and stores the values as
attributes.  I
> think this plugin requires the raster and vector layers to be in the
same
> projection as each other, and it doesn't work with memory layers.
> 
> 3) The "profile export" plugin samples the first segment of a selected
polyline
> feature, storing the values in an xml file formatted for some German
cable car
> design software.  It requires the line and raster layers to be in the
same CRS.
> 
> While we're discussing cross/long section plugins, I seem to remember
a plugin
> which put any intersecting vector features (from any layer) on a
section.  I
> can't find anything like that now - does anybody know of something
which does
> this, or did I imagine it?
>
> 
> Alister