Oops, I forgot to change the subject while replying...
Is there a way to extract elevations (either from contours or a dem)
into a 2D line to add a 3rd dimension to the line? Also, is it
possible to create a distance, elevation profile along this line?
Right now I have a 2D shapefile of a race course and a DEM (or
contours) of the same area. I would like to create a plot of distance
to elevation across the course.
I am jumping into Grass for the first time, so help at the most basic
level would be great.
Thanks,
David
On Wednesday 04 January 2006 02:01 pm, David Bitner wrote:
Oops, I forgot to change the subject while replying...
> Is there a way to extract elevations (either from contours or a dem)
> into a 2D line to add a 3rd dimension to the line? Also, is it
> possible to create a distance, elevation profile along this line?
>
> Right now I have a 2D shapefile of a race course and a DEM (or
> contours) of the same area. I would like to create a plot of distance
> to elevation across the course.
>
> I am jumping into Grass for the first time, so help at the most basic
> level would be great.
>
> Thanks,
> David
try v.drape in the CVS branch.
cheers!
--
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341
Perfect.
Now is there a way that I can create a distance along the line to
elevation at that distance profile? Even just a table of distance to
elevation that could be plotted in a graphing package.
Thanks,
David
On 1/4/06, Dylan Beaudette <dylan.beaudette@gmail.com> wrote:
On Wednesday 04 January 2006 02:01 pm, David Bitner wrote:
> Oops, I forgot to change the subject while replying...
>
> > Is there a way to extract elevations (either from contours or a dem)
> > into a 2D line to add a 3rd dimension to the line? Also, is it
> > possible to create a distance, elevation profile along this line?
> >
> > Right now I have a 2D shapefile of a race course and a DEM (or
> > contours) of the same area. I would like to create a plot of distance
> > to elevation across the course.
> >
> > I am jumping into Grass for the first time, so help at the most basic
> > level would be great.
> >
> > Thanks,
> > David
try v.drape in the CVS branch.
cheers!
--
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341
Great.
There are a couple ways of doing this.
one such method:
1. create points along your line segment with v.to.points [1]
2. copy elevation attribute from line to points
3. dump points and attributes as text
4. process with your favorite graphing app
[1] see manual for the details on this command- note that it will create an
attribute 'along' which is a measure of the distance along the line you are
interested in.
cheers,
Dylan
On Thursday 05 January 2006 07:02 am, David Bitner wrote:
Perfect.
Now is there a way that I can create a distance along the line to
elevation at that distance profile? Even just a table of distance to
elevation that could be plotted in a graphing package.
Thanks,
David
On 1/4/06, Dylan Beaudette <dylan.beaudette@gmail.com> wrote:
> On Wednesday 04 January 2006 02:01 pm, David Bitner wrote:
> > Oops, I forgot to change the subject while replying...
> >
> > > Is there a way to extract elevations (either from contours or a dem)
> > > into a 2D line to add a 3rd dimension to the line? Also, is it
> > > possible to create a distance, elevation profile along this line?
> > >
> > > Right now I have a 2D shapefile of a race course and a DEM (or
> > > contours) of the same area. I would like to create a plot of
> > > distance to elevation across the course.
> > >
> > > I am jumping into Grass for the first time, so help at the most basic
> > > level would be great.
> > >
> > > Thanks,
> > > David
>
> try v.drape in the CVS branch.
>
> cheers!
>
> --
> Dylan Beaudette
> Soils and Biogeochemistry Graduate Group
> University of California at Davis
> 530.754.7341
--
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341
So actually to just get the profile data the fastest workflow would be:
1. create points along my line at specific distances with v.to.points
2. grab elevation for the points with v.drape (or would something else
be better for point data)
3. dump points and attributes (or at this point just dump distance and
elevation attributes, who cares about the point anymore)
4. process with my favorite graphing application
On 1/6/06, Dylan Beaudette <dylan.beaudette@gmail.com> wrote:
Great.
There are a couple ways of doing this.
one such method:
1. create points along your line segment with v.to.points [1]
2. copy elevation attribute from line to points
3. dump points and attributes as text
4. process with your favorite graphing app
[1] see manual for the details on this command- note that it will create an
attribute 'along' which is a measure of the distance along the line you are
interested in.
cheers,
Dylan
On Thursday 05 January 2006 07:02 am, David Bitner wrote:
> Perfect.
>
> Now is there a way that I can create a distance along the line to
> elevation at that distance profile? Even just a table of distance to
> elevation that could be plotted in a graphing package.
>
> Thanks,
> David
>
> On 1/4/06, Dylan Beaudette <dylan.beaudette@gmail.com> wrote:
> > On Wednesday 04 January 2006 02:01 pm, David Bitner wrote:
> > > Oops, I forgot to change the subject while replying...
> > >
> > > > Is there a way to extract elevations (either from contours or a dem)
> > > > into a 2D line to add a 3rd dimension to the line? Also, is it
> > > > possible to create a distance, elevation profile along this line?
> > > >
> > > > Right now I have a 2D shapefile of a race course and a DEM (or
> > > > contours) of the same area. I would like to create a plot of
> > > > distance to elevation across the course.
> > > >
> > > > I am jumping into Grass for the first time, so help at the most basic
> > > > level would be great.
> > > >
> > > > Thanks,
> > > > David
> >
> > try v.drape in the CVS branch.
> >
> > cheers!
> >
> > --
> > Dylan Beaudette
> > Soils and Biogeochemistry Graduate Group
> > University of California at Davis
> > 530.754.7341
--
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341
Sounds good to me.
In fact I have used a similar method before the advent of v.drape, using
v.to.points and v.sample to get elevation and precip transects along an
arbitrary line. Plotting was done in gnuplot, exported to PS.
Ex: http://casoilresource.lawr.ucdavis.edu/drupal/node/33
good luck!
Dylan
On Friday 06 January 2006 11:09 am, David Bitner wrote:
So actually to just get the profile data the fastest workflow would be:
1. create points along my line at specific distances with v.to.points
2. grab elevation for the points with v.drape (or would something else
be better for point data)
3. dump points and attributes (or at this point just dump distance and
elevation attributes, who cares about the point anymore)
4. process with my favorite graphing application
On 1/6/06, Dylan Beaudette <dylan.beaudette@gmail.com> wrote:
> Great.
>
> There are a couple ways of doing this.
>
> one such method:
> 1. create points along your line segment with v.to.points [1]
> 2. copy elevation attribute from line to points
> 3. dump points and attributes as text
> 4. process with your favorite graphing app
>
> [1] see manual for the details on this command- note that it will create
> an attribute 'along' which is a measure of the distance along the line
> you are interested in.
>
> cheers,
>
> Dylan
>
> On Thursday 05 January 2006 07:02 am, David Bitner wrote:
> > Perfect.
> >
> > Now is there a way that I can create a distance along the line to
> > elevation at that distance profile? Even just a table of distance to
> > elevation that could be plotted in a graphing package.
> >
> > Thanks,
> > David
> >
> > On 1/4/06, Dylan Beaudette <dylan.beaudette@gmail.com> wrote:
> > > On Wednesday 04 January 2006 02:01 pm, David Bitner wrote:
> > > > Oops, I forgot to change the subject while replying...
> > > >
> > > > > Is there a way to extract elevations (either from contours or a
> > > > > dem) into a 2D line to add a 3rd dimension to the line? Also, is
> > > > > it possible to create a distance, elevation profile along this
> > > > > line?
> > > > >
> > > > > Right now I have a 2D shapefile of a race course and a DEM (or
> > > > > contours) of the same area. I would like to create a plot of
> > > > > distance to elevation across the course.
> > > > >
> > > > > I am jumping into Grass for the first time, so help at the most
> > > > > basic level would be great.
> > > > >
> > > > > Thanks,
> > > > > David
> > >
> > > try v.drape in the CVS branch.
> > >
> > > cheers!
> > >
> > > --
> > > Dylan Beaudette
> > > Soils and Biogeochemistry Graduate Group
> > > University of California at Davis
> > > 530.754.7341
>
> --
> Dylan Beaudette
> Soils and Biogeochemistry Graduate Group
> University of California at Davis
> 530.754.7341
--
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341
Sweet.
Actually looks like just using the released Grass 6 rather than CVS
and using v.sample will actually fit my needs better than v.drape.
Thanks for the help.
On 1/6/06, Dylan Beaudette <dylan.beaudette@gmail.com> wrote:
Sounds good to me.
In fact I have used a similar method before the advent of v.drape, using
v.to.points and v.sample to get elevation and precip transects along an
arbitrary line. Plotting was done in gnuplot, exported to PS.
Ex: http://casoilresource.lawr.ucdavis.edu/drupal/node/33
good luck!
Dylan
On Friday 06 January 2006 11:09 am, David Bitner wrote:
> So actually to just get the profile data the fastest workflow would be:
> 1. create points along my line at specific distances with v.to.points
> 2. grab elevation for the points with v.drape (or would something else
> be better for point data)
> 3. dump points and attributes (or at this point just dump distance and
> elevation attributes, who cares about the point anymore)
> 4. process with my favorite graphing application
>
> On 1/6/06, Dylan Beaudette <dylan.beaudette@gmail.com> wrote:
> > Great.
> >
> > There are a couple ways of doing this.
> >
> > one such method:
> > 1. create points along your line segment with v.to.points [1]
> > 2. copy elevation attribute from line to points
> > 3. dump points and attributes as text
> > 4. process with your favorite graphing app
> >
> > [1] see manual for the details on this command- note that it will create
> > an attribute 'along' which is a measure of the distance along the line
> > you are interested in.
> >
> > cheers,
> >
> > Dylan
> >
> > On Thursday 05 January 2006 07:02 am, David Bitner wrote:
> > > Perfect.
> > >
> > > Now is there a way that I can create a distance along the line to
> > > elevation at that distance profile? Even just a table of distance to
> > > elevation that could be plotted in a graphing package.
> > >
> > > Thanks,
> > > David
> > >
> > > On 1/4/06, Dylan Beaudette <dylan.beaudette@gmail.com> wrote:
> > > > On Wednesday 04 January 2006 02:01 pm, David Bitner wrote:
> > > > > Oops, I forgot to change the subject while replying...
> > > > >
> > > > > > Is there a way to extract elevations (either from contours or a
> > > > > > dem) into a 2D line to add a 3rd dimension to the line? Also, is
> > > > > > it possible to create a distance, elevation profile along this
> > > > > > line?
> > > > > >
> > > > > > Right now I have a 2D shapefile of a race course and a DEM (or
> > > > > > contours) of the same area. I would like to create a plot of
> > > > > > distance to elevation across the course.
> > > > > >
> > > > > > I am jumping into Grass for the first time, so help at the most
> > > > > > basic level would be great.
> > > > > >
> > > > > > Thanks,
> > > > > > David
> > > >
> > > > try v.drape in the CVS branch.
> > > >
> > > > cheers!
> > > >
> > > > --
> > > > Dylan Beaudette
> > > > Soils and Biogeochemistry Graduate Group
> > > > University of California at Davis
> > > > 530.754.7341
> >
> > --
> > Dylan Beaudette
> > Soils and Biogeochemistry Graduate Group
> > University of California at Davis
> > 530.754.7341
--
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341