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In a traverse, how to change the starting point of a new line (or how to reverse the traverse direction)

AndrewWallick

When I'm creating a parcel traverse in ArcGIS Pro, I'd like to be able to create a few lines, then create another line starting at the beginning of the traverse.This usually comes in handy when I have a curve that is only tangent from one direction.

This was possible in ArcMap, you just clicked where you wanted the line to start.

Is this possible in ArcGIS Pro?

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AmirBar-Maor

@AndrewWallick

You can select an entered course in the traverse grid and drop it in any position, including the first course as you can see in the animation below.

Would think work?

If we see the actual deed/plat it might help better understand... if I understand correctly you have a tangent curve that is used as the first course... feel free to add the deed/plat in your reply as there might be a more efficient workflow.

Traverse drag a course in the grid.gif

AndrewWallick

Thanks for the quick response @AmirBar-Maor ! I wasn't aware you could drag the lines within a traverse - that might be helpful but I'm not sure it accomplishes what I'm looking for here.

Here's the portion of the plat I'm working on. I'm traversing this parcel, starting with the lines in red. Then I get to #3, and realize the next line is a curve that I don't have a direction for (this happens all the time unfortunately). But I look down and see that the next two curve come off a straight line at a tangent.

So in ArcMap I would just start a new line of the traverse, but click on the starting point of the line back at the beginning, (following the blue arrows now).

In this particular parcel, I could have just gone the other direction from the start. But often, especially on more complicated parcels, it's easy to miss these curves in an initial scan. So then it's either start over, or do more complicated techniques to estimate or derive the tangent direction. In addition, some parcels have had tangent curves from two different directions, which is easiest to traverse if you can reverse the directions like you could in ArcMap.

let me know if any of this is still unclear, I'm happy to clarify more if needed!

TimHodson

Hi Andrew,

You could do the following: once you get to end of line 3, click the New button at the bottom right of the traverse dialog to start a new traverse. Set the start point at the start of 1, and set the new closing point to the end point of line 3. You can then do this second traverse to check closure, and go in the direction that gives you the tangency without having to re-enter the first set of lines.

-Tim

TimHodson

Hi again Andrew, please also add your idea of reversing the traverse to the Parcel Fabric Ideas site. There is also a related idea about reversing a bearing within the traverse, but your idea for reversing a traverse would work differently.

Thanks,

-Tim

AndrewWallick

Thanks for the idea! So are you saying that traverses can calculate closure with two separate traverses?

TimHodson

Also related. The Reverse Direction command used with Edit vertices will reverse the geometry as well as the COGO Direction value:

AmirBar-Maor

@AndrewWallick @TimHodson and everybody else.

I thought it might be useful to create a small video capturing a few tips and tricks as well as Tim's tips.

Should Tracing a traverse be allowed to reverse a course that goes in the wrong direction?

AndrewWallick

Just did! It's here:

https://community.esri.com/t5/arcgis-parcel-fabric-ideas/change-the-starting-point-of-a-line-within-a/idi-p/1098952/jump-to/first-unread-message

AndrewWallick

That video was helpful, thanks! At the end though, at what point exactly did the traverse update the misclose? Was it immediately after you finished the trace, or some other point? I didn't see any kind of notification that it had made an adjustment.

AmirBar-Maor

@AndrewWallick Since the misclose is small and since it happens so fast it is hard to see the misclose being adjusted among all traverse courses.

The traverse will adjust it if it falls within the specified closure tolerance.

So in my previous video you can actually skip the edit vertices step if the misclose gap is smaller than the tolerance.

Here is an exaggerated example where misclose is 15' and the Closure Tolerance is 25'. Corner points were added to help see the movement of all other courses. This also occurs if the traverse is already closed:

Traverse Auto Adjustment if within tolerance.gif

AndrewWallick

Ah perfect, now i see exactly when it updates. Thanks again!

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