So the other day I started tinkering with something that ended up being really slick.?ÿ I exported an .xml file of some boundary linework into my data collector with the intention of using the georeferencing function to move it onto found monuments.
It worked similarly to localizing where you pick a linework point and a matching ground point.?ÿ The issue I ran into, that I'm curious if there is a fix or adjustment for, is the .xml linework was moved onto the first point I selected and the second point was apparently only used for rotation.?ÿ This caused there to be a 0.40' difference between the second ground point and its corresponding .xml point.?ÿ This was close enough for searching purposes but I'm wondering if someone might know of a way to cause the .xml linework to be centered between these ground point pairs instead?
Hey when you say you exported xml linework where did that come from i will try and mess around with it and see. I have a small lot survey coming up and it close to me and i know them so i can try and do a little tweaking and testing. I am not understanding the xml linework i know land xml for a surface dxf or dwg but i am learning all this new jargon daily .
Oh woops, I think it was a .dxf actually; I get those confused all the time though I think there isn't much difference between them? Anyway, I exported the linework out of Civil 3D. I'm trying to remember how I did it from memory since I'm at home now but you need to select objects and choose just the linework or else it'll grab everything, even your paperspace title block stuff, and you'll have that junk cluttering up your data collector screen.
And then in Access you go into Cogo, scroll all the way down to Adjust and inside that menu should be Georeferencing.
@bstrand gotcha. I will try it a few ways. I have some data and a few deeds pre computed so i should be good. I know if you have computed a boundary say or whatever you can translate rotate points. I usually don’t do that but having a dxf seems like it would be liked by field crews especially when walking the line in woods being able to stay close and not wonder. One of my favorite is the just cogo compute point and i just use the deed or plat and once i find one point and then 2nd i use bearing of my datum and difference of the deeds bases and start going if i need to. This allows me to follow fairly well and tweak to find corners. I usually use it mostly when i am in thise situations I truly need to narrow down the search area and a mag locator is of no use. Like i had to find a pipe at a corner but pacing i landed literally i. A rebar stock pike so i computed from a few different found monuments and narrowed down a search area and just started digging. Found the pipe about a half a foot down.
Hey here is a quick video see if this helps it has ability to scale horizontal and rotate or average mostly just translate and rotate. But to get close might be good enough.
Please forgive me if this is too obvious. I keep starting to type this then delete it. I am spinning out in my mind. Anyway:
In your data collector calc a point 3 at the midpoint between 1-2. Then insert the dxf line work at point 3 and rotate to 1 or 2.
This is the way to do it!!!
Thanks, I've imported maps into Access but I didn't realize I could shift and rotate the linework.
I only used it to search so I didn't have to create calc points everywhere. I only have done it for projects where I already had control coordinates in the area so I would be close anyway.
Localizing theoretical linework makes so much more sense than localizing surveyed coordinates.
Please forgive me if this is too obvious. I keep starting to type this then delete it. I am spinning out in my mind. Anyway:
In your data collector calc a point 3 at the midpoint between 1-2. Then insert the dxf line work at point 3 and rotate to 1 or 2.
That would work if you happened to have a way to grip the midpoint of that line in the .dxf. Maybe the cad bar in Access lets you snap to that point or something I guess; I know I didn't have anything in my cad linework at that point that would let me snap to it.
@brad-ott lots of ways to do that sort of thing. So i took a deed and the access emulator before I headed to farm. Deed dxf. Then brought in a few points from my recent survey. Held a back line so then computed new points around areas that missed a few observed points over the size of pipe and used the new comp vs actual measured
That would work if you happened to have a way to grip the midpoint of that line in the .dxf. Maybe the cad bar in Access lets you snap to that point or something I guess; I know I didn't have anything in my cad linework at that point that would let me snap to it.
Not the Cad bar, but the Snap-to bar allows to select (and if wanted create) a point at the centre of dxf line.
You can also use it for intersections of two dxf lines, which I find handy for doing building grids.
And since no-one else has mentioned it, I would point out there are some options for geo-referencing - you can force Access to hold the scale and/or the rotation of the incoming map. Also how to assign elevations.
