Re: [GRASS-user] Elevation profile from intersecting shapefiles‏

[Maris Nartiss]

You can also take a look at new vector addon module v.profile. It will
give Your track intersections with contour lines or any other
points/lines. Currently it has limitation - Your track has to be a
single vector line. You can also combine r.profile and v.profile to
create better track profiles (i.e. use r.profile for elevation and
v.profile to get crossings with various vector layers like revers,
roads etc.).

Also, as most (all?) list members are volunteers, it may happen, that
nobody has time to write an answer. Reading GRASS documentation is a
great way how to spend Your time till somebody answers Your problem.

WBR,
Maris.

2008/11/30, Micha Silver <micha at arava.co.il>:
> georgew wrote:
>>
>> What, no takers? Just a Yes or No will be already of great help to me,
>>
>
> Yes.
> I think you should be looking at converting the shapefile contour lines to a
> raster, then make an elevation surface from that, and use the r.profile
> module to calculate elevation profiles for the track lines. So:
>
> v.in.org to import the contour lines and tracks into grass
> v.to.rast and r.thin to convert the contour lines to a raster map.
> r.surf.contour to create an elevation surface from the rasterized contours
> r.profile to get the elevations along the tracks.
>
> Post back with specific questions if you hit a snag.
>
> Regards,
> Micha
>>
>> anything more, like some hint on a possible solution would be cream on
>> top.
>> Thanks all the same for reading this.
>> George
>>
>>
>>
>> georgew wrote:
>>
>>>
>>> Hi, I am totally new to GRASS and overwhelmed by its scope and not sure
>>> whether the following is possible:
>>> I have a set of topographic maps in shapefile format containing contours
>>> and walking tracks. The track data does not include elevation (only lat.
>>> and long.), but the contour lines do include elevation. Is it possible
>>> (and how?) to create an elevation profile for the length of the walking
>>> track using the intersecting points between the track and the contour
>>> lines to obtain the elevation values?
>>> Many thanks for any assistance you can give me.
>>> George
>>>
>>>
>>
>>
>
>
>