Thak you Teddy
I tried installing Openjump and Interpolate Points with breaklines using
the proper Sextante tool but even, if the triangulation was right
(respect to the breaklines), the quotes of the 2,5D polygons generated
by the tool were not right! Maybe I missed something?
Looking around for some tools useful for my purpuse, I found the
v.Triangle (1) Grass module that is no more contained in the Grass
Processing Tool in Qgis (or at least I couldn't find it!)
It's simply a "front-end" to the famous utility Triangle
<http://www.cs.cmu.edu/%7Equake/triangle.html> (2) of J.R. Shewchuk
...and It should be exactly what I need in Qgis.
Could I do something to support the (re)developping or new adding of
this processsing module?
Thanks in advance.
Riccardo
/_*Riccardo Casoli*_, Geologo(email:[email protected]
<mailto:[email protected]>; cell:3289026131)/
Studio Associato Risorsaterra
/di Massimo Barbonaglia, Riccardo Casoli,
Michele Colombo, Federico Cravello/
via Coda, 22/E - 13900 Biella Chiavazza
Tel e fax: 01523346
e-mail: [email protected] <mailto:[email protected]>
PEC: [email protected]
<mailto:[email protected]>
C.F. e P.Iva: IT02413380029
______
(1) https://grasswiki.osgeo.org/wiki/TIN_with_breaklines
(2) http://www.cs.cmu.edu/~quake/triangle.html
*Da:* Qgis-user-request <[email protected]>
*Data:* Venerdì, 30.03.2018 11:01 +0200
*A:* [email protected] <mailto:[email protected]>
*Oggetto:* Qgis-user Digest, Vol 145, Issue 62
Message: 1
Date: Wed, 28 Mar 2018 20:10:21 +0200
From: teddy guerin<[email protected]>
To:"[email protected]" <[email protected]>
Cc:[email protected]
Subject: Re: [Qgis-user] TIN Interpolation from points (survey) with
break (interrupt or constraint) lines
Message-ID:<[email protected]>
Content-Type: text/plain; charset="utf-8"
Hi,
I seem that you use grass (module of qgis) for this action or openjump 😉.
Regards
Ted
Envoyé de mon iPad
Le 28 mars 2018 à 19:23,"[email protected]" <[email protected]> a
écrit :
Hi everybody
I have a PointSHP with Z field value that represents the survey on a step
vineyard: points have been token along base and edge of steps to represent
slope breaks.
In order to build a TIN (DEM) I created a line SHP and drew a series of lines
linking related points (respecting morphological alignements).
Then I tried to build a triangulagion TIN (DEM) by "Interpolation TIN" tool
using my points with their Z elevation field and my breaklinesline SHP to constrain
triangulation inside each slope or step.
But the TIN obtained is a regular inclined surface that follows the general
slope of the whole survey given by mean of z value of points: no steps no
slopes.
Where I miss? What is the way to build a TIN from points with constrain lines?
I send an image that represents the points and breaklines on a orthophoto
foreground and beside the same vector elements on the resulting TIN by
interpolation.
Thanks in advance.
--
Riccardo Casoli, Geologo (email:[email protected]; cell:3289026131)
Studio Associato Risorsaterra
di Barbonaglia, Casoli, Colombo, Cravello
Agricoltura, geologia, foreste
via Coda, 22/e
13900 Biella Chiavazza
Tel e fax: 01523346
e-mail:[email protected]
C.F. e P.Iva: IT02413380029
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