Topographic implantation

Hi all,

I would like from a line find precise coordinates in X and Y to implement this line.

Exemple: this line:

I looking a coordinate round in the "infinte" line:

In this example I cheated by first tracing the line with precise coordinates, but the goal would be to start from a Line Draws without coorodnées.

Thanks for all !

Replies to This Discussion

Permalink Reply by David Rutten on June 24, 2015 at 7:40am

The bigger the search domain, the better the final answer you can get.

Permalink Reply by Rémy Maurcot on June 24, 2015 at 7:44am

Look at my line;

with large coordinates: Y seems stuck ...

It's possible to defined a domain X and Y ?

Permalink Reply by nikos tzar on June 24, 2015 at 8:00am

You could create the domain based on your line:

Attachments:

linetogrid-1.gh, 12 KB

Permalink Reply by Rémy Maurcot on June 24, 2015 at 8:44am

The problem is a domain defined for X coordinates.

For Y there is no limitation.

This does not work for my line!

Permalink Reply by nikos tzar on June 24, 2015 at 9:31am

One thing I noticed is that your line is extremely off from 0,0,0.

Moving it near the start of the ucs returns a line.

If this still doesn't work, then maybe I didn't understand David's solution and the domain is not the line's X coordinates domain.....?

Permalink Reply by Rémy Maurcot on June 24, 2015 at 10:05am

I feel that there is a limit in Y

Permalink Reply by Rémy Maurcot on June 24, 2015 at 10:10am

With your définition i solve my problem but the points are so far !

Permalink Reply by David Rutten on June 24, 2015 at 10:39am

That is correct, the search domain is bounded along the X-axis only. The points in the Y direction are computed by intersection, so they are not limited to a specific domain.

This algorithm will return the best possible point pair within the given x-domain. If you want a better solution you need to enlarge the domain so more points become available for the search. If points are too far away from the line you need to shrink the domain to get them closer.

Your problem is basically like the Heisenberg uncertainty principle. The more accurately you measure one thing, the less accurate another becomes. Either you want points near the original line and you don't care much about accuracy, or you want high accuracy in which case you are not allowed to care if the points end up far away.

Permalink Reply by Rémy Maurcot on June 24, 2015 at 10:55am

Nice explanation, too bad my English is bad I can not dwell on the subject.

In topography there are principle for solving this kind of thing, I'm going out my class!

Permalink Reply by nikos tzar on June 24, 2015 at 7:02am

you are both right, looking at it a bit more I ended up doing what FRiou sugested: