I am currently attempting to station the following:
I was at the point of putting in the stations when I was made aware that there were station equalities that needed to be addressed. At the intersection of the green and blue lines there are two stations: P.O.T. STA. 18+81.85 NORTH AVENUE (the blue line traveling west to east) = P.O.T. STA. 50+00.00 ARCH STREET (the green traveling north to south).
As I understand it, to address the station equalities, and to station the blue line to start) I would have to measure the distance from the end of the blue line to the intersection of the green and blue lines, and then subtract that number from the blue line station. The resulting number would be the station at the start of the line.
Still new to alignments and stationing, I put that number in to the stationing dialogue box:
...and hit apply.
Not quite the result I thought it would be.
I have a couple of sources but nothing that explains what I should have done. I have a vague idea that STA 18+81.85 might need to go into the Ahead Station, but I've nothing to confirm that.
Anyway, is there a better definition of "station equalities" than what I'm using, and what *should* I be doing in order to get the stationing correct. I have eight of these, so if I get the first one, one would think the rest should fall into place.
thanks!
The Station Equations box in this dialog creates station equations on a single alignment. It has nothing to do with intersections with, or offsets to another alignment.
It sounds like you are trying to establish the stationing for each alignment based on the station at a known location. This is actually pretty easy to do, though it's not immediately apparent.
First, ignore the Station Equations box. In the upper area click the target button adjacent to the corridor fields. That will allow you to pick a location in the drawing. Snap to the intersection of the two alignments and accept; that will fill the coordinate field with the coordinates at that point. In the Starting Station field key in the proposed station for that location and hit apply. InRoads will calculate the station for the start of the alignment.
Ray,
Thanks for replying! I took the "...target button adjacent to the corridor fields." to be the one near the "Starting Station, Name, etc,". After clicking that, the box goes away and I go into the drawing, but snap mode seems to be "off" at that point. I use tentative, and keep cycling until the intersection does get chose, left click to accept, and...nothing happens.
Obviously I've missed something...
That's the right button.
I suspect that the problem may have been all the tentative clicks. If you've right-clicked anywhere in the sequence, the command will abort with little or no notice. Before snapping set your snap mode to intersection so you don't have to cycle through all the possibilities.
Probably, but the bigger issue is it acts like the snaps are off after clicking the target button. Hence using tentative click(s).
You can try holding CTRL+SHIFT to activate Accusnap for this maneuver.Sometimes Accusnap is suspended by certain commands. CTRL+SHIFT will get it to function in those circumstances. That same combination can suspend Accusnap for one click if you need.
MaryB
Power GeoPak 08.11.09.918Power InRoads 08.11.09.918OpenRoads Designer 2021 R2