Direction - what it is? (Software)

surveyor @, Samstag, 07. Oktober 2017, 21:25 (vor 69 Tagen)

Good Morning Gentlemen's.

Question:
What is direction?

My understanding that it is a non-oriented kind of azimuth.
However, when I am trying to apply this interpretation to the deformation example I am running into following problem:

Deformation example:

Deformation example files.

file: r1001_1.txt
1001 100 139.56086 Ok
.........
1001 1003 293.76135 Ok
1001 1006 112.81042 ?
1001 1004 132.85213 ?
1001 1005 175.86115 ?

Please note that angles staring from point 1006 are "reset". According to my interpretation of the direction, I would expect to see angles for the points 1006,1004,1005 continue to increase (for example they would be bigger than angle to the point 1003). Why it is not the case ?

Second question:

How to represent an "real" azimuth using direction?

Kind regards.

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Direction - what it is?

Micha ⌂, Bad Vilbel, Samstag, 07. Oktober 2017, 21:38 (vor 69 Tagen) @ surveyor

Hello,

What is direction?
My understanding that it is a non-oriented kind of azimuth.

That's is it: a non-orientated (w.r.t the north) azimuth.

file: r1001_1.txt
1001 100 139.56086 Ok
.........
1001 1003 293.76135 Ok
1001 1006 112.81042 ?
1001 1004 132.85213 ?
1001 1005 175.86115 ?

Please note that angles staring from point 1006 are "reset". According to my interpretation of the direction, I would expect to see angles for the points 1006,1004,1005 continue to increase (for example they would be bigger than angle to the point 1003). Why it is not the case ?

During the adjustment, the sorting order is irrelevant. The file content is divided into observations to the (sorted) object points and observation to the (sorted) reference points. Is it a synthetisch example.

How to represent an "real" azimuth using direction?

Take a look to Fig. 3. You can fix the unknown parameters of a group. The picture shows a distance group and the additional parameters of this kind of group are the scale parameter m and the zero point offset add. For directions, the additional unknown parameter is the orientation ori.

Kind regards
Micha

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Tags:
JAG3D, Direction, Azimuth, Deformation analysis, Example

Direction - what it is?

surveyor @, Samstag, 07. Oktober 2017, 22:15 (vor 69 Tagen) @ Micha

Thank you Sir.

Direction - what it is?

surveyor @, Sonntag, 08. Oktober 2017, 00:08 (vor 69 Tagen) @ Micha

Thank you Again.

Clarification question.


Data:
Same data set as in deformation example.

file: r1001_1.txt
1001 100 139.56086
.........
1001 1004 132.85213
....

Observation:

When I am looking at network sketch I see that points 100 and 1004 are located in opposition to each other (across point 1001), however angles to them are almost identical. Why? (Same question is for points 1006,1005).

------------------------------

New Question:
Trying to run a example
Tutorial - Evaluation of a hybrid 1D, 2D and 3D network


Followed example instructions.(including importing data,
setting projection and instruments parameters)

Received following error when attempted to run adjustment:
"Error, selected projection and reduction cannot be applied".
I think may be I am missing something: For example my dialog window
for setting a projection looks different from
Figure 4: Projection settings
Dialog which I have doesn't have 3D option, just "None" and "2D reduction of projection"

Program version: 3.6.200171001

Kind Regards.

Direction - what it is?

surveyor @, Sonntag, 08. Oktober 2017, 02:02 (vor 69 Tagen) @ surveyor

Good Evening Gentleman's.
Mage to make tutorials run on Windows.
(Previous attempt was on Linux)
Unfortunately my results (sketch) looked different from
what showed in tutorial.

-----------------------------------------------------------------
Figure 3: Network sketch after the adjustment of the classic cadastral survey

Survey plan - test run results

-----------------------------------------------------------------
Figure 1: Network sketch of the underground system

Underground system - test run results
-----------------------------------------------------------------

What I am doing wrong ?

Kind Regards.

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Direction - what it is?

Micha ⌂, Bad Vilbel, Sonntag, 08. Oktober 2017, 11:02 (vor 69 Tagen) @ surveyor

Hi,

What I am doing wrong ?

Nothing. ;-) JAG3D plots 1D-points since version ???. The 1D points have [0/0] position for x and y, therefore, these points are plotted at the origin. You can use window-zooming (press left mouse button and draw a rectangle).

regards
Micha

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Direction - what it is?

surveyor @, Sonntag, 08. Oktober 2017, 20:17 (vor 68 Tagen) @ Micha

Thank you Micha.

I zoomed in as you suggested and
discover couple more questions :) :

1) My zoomed in sketch for the 1D2D3D (mine) network is
looking a bit different from the tutorial:

For example error ellipses seems to be much bigger, point 788 is green (not changing)
but in my version it has an arrow and pink color (changing).


Figure 1: Network sketch of the underground system

This is my zoomed in.

Zoomed in part of the mine network

Is this a valid result?
-----------------------------------

2) What is the difference between datum point,reference point and stochastic point.

-----------------------------------

3) Is there an example of the network planing (pre-analysis).

----------------------------------
4) In tutorial survey_plan point 4 seems to have invalid coordinate
file: points_new_2d.txt
....
4 1098 2043
....

it seems that better initial approximation will be

4 998 2043


Results with original coordinate

Results with "fixed" coordinate

Regards.

Avatar

Direction - what it is?

Micha ⌂, Bad Vilbel, Sonntag, 08. Oktober 2017, 20:52 (vor 68 Tagen) @ surveyor

Hi,

For example error ellipses seems to be much bigger, point 788 is green (not changing)
but in my version it has an arrow and pink color (changing).

That's true, because in the current version, the 1D points (and its confidences) are plotted, too. JAG3D calculates the average values over all confidences to scale the ellipses.

The stochastic point 62010402 is unstable. Take a look to figure 7. In the sketch, JAG3D highlights outliers in magenta color. After changing the point type (move 62010402 to new point group), no more outlier is detected (no point is magenta). A current screen shot is

[image]

Is this a valid result?

Maybe, but it seems to differ from my one. Do you set up the right stochastic model? Do you remove outliers? Did you saw my project database?

2) What is the difference between datum point,reference point and stochastic point.

Datum points are new points but these points are used to define the geodetic datum. The singular normal equation is bordered by condition equations. The conditions are derived from the datum points. Reference points are error free (zero variances) coordinates and stochastic points have a variance greater than zero.

3) Is there an example of the network planing (pre-analysis).

I don't create an example but it is more or less the same like a normal adjustment. Just take for example the mine tutorial and switch to a pre-analysis. ;-)

4) In tutorial survey_plan point 4 seems to have invalid coordinate

Yes, you are right. I uploaded a fixed version.

kind regards
Micha

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Direction - what it is?

surveyor @, Sonntag, 08. Oktober 2017, 21:19 (vor 68 Tagen) @ Micha

Thank you Micha.

I really like your program and planning to use it in my work
but need to get familiar with it. That why so many questions.

I may be having more :).

Thank again.

Regards

Avatar

Direction - what it is?

Micha ⌂, Bad Vilbel, Sonntag, 08. Oktober 2017, 10:57 (vor 69 Tagen) @ surveyor

Hello,

When I am looking at network sketch I see that points 100 and 1004 are located in opposition to each other (across point 1001), however angles to them are almost identical. Why? (Same question is for points 1006,1005).

Again, it is just a synthetic simulated network. The directions are taken from a random generator without checking the so-called face of the direction.

Received following error when attempted to run adjustment:
"Error, selected projection and reduction cannot be applied".

I cannot agree, it works as expected. I upload the project for demonstration temp. here. Just validate your import and options.

Dialog which I have doesn't have 3D option, just "None" and "2D reduction of projection"
Program version: 3.6.200171001

With version 3.6, JAG3D supports a rigorous integration of deflection of the vertical. Thus, there is no need for 3D reductions anonyme. It was removed.

regards
Micha

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Tags:
JAG3D, Direction, Azimuth, Deformation analysis, Example

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