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Offset Survey Figure in Civil 3D
Posted by jeff-wright on November 8, 2016 at 8:22 pmHi,
Here’s the background information. I located the bottom of a short existing wall by plumbing my rod flush against the face of the wall. By doing so, my shots and the resulting survey figure are offset from the true face of wall location by half of the rod width (about 0.04′). Using Civil 3D, I would like to correct for the 0.04′ by offsetting figure back to it’s true location. Ideally, the newly created survey figure would have points at each vertex. It would be a bonus if said points retained the original point attributes and elevation.
By the way, I’m using Civil 3D 2013. I have heard that Civil 3D 2016 deals with this situation differently.
Thanks in advance!
imaudigger replied 7 years, 11 months ago 9 Members · 13 Replies -
13 Replies
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In the future you can use the offset command in the data collector.
I do not know the answer to your question, expect to offset the line 0.04 feet and make new points using the same elevation, and to redraw the wall.
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First, draw a 3d polyline between the points. Then use the “OffsetFeature” command to offset the polyline. Use 0 for the vertical offset if you want to hold the original elevations. Use the “CreatePointAutomatic” command to insert points at the 3dpoly’s vertices. I do not know of a good way to hold your original point descriptions. If it is a small number of points, you could manually “pick up” each point and snap it to the new 3dpoly’s vertices.
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ScottySantaFe, post: 398923, member: 9477 wrote: First, draw a 3d polyline between the points. Then use the “OffsetFeature” command to offset the polyline. Use 0 for the vertical offset if you want to hold the original elevations. Use the “CreatePointAutomatic” command to insert points at the 3dpoly’s vertices. I do not know of a good way to hold your original point descriptions. If it is a small number of points, you could manually “pick up” each point and snap it to the new 3dpoly’s vertices.
Thanks for the idea. It’s not a huge number of points (about 125). However, I don’t believe that I can manually pick up and move each point because they are part of a survey figure. The only way I know of moving these points is to manually edit the northings and eastings in the survey database (found in the survey tab not the prospector tab of the toolspace). I think autocad intentionally makes this process cumbersome to protect the survey data.
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Scott Ellis, post: 398904, member: 7154 wrote: In the future you can use the offset command in the data collector.
I do not know the answer to your question, expect to offset the line 0.04 feet and make new points using the same elevation, and to redraw the wall.
Thanks, Scott. I’ll try the offset command in the data collector next time. This kind of adjustment was really easy to do in the software that I used at my last job and I thought it would also be a simple matter in Civil3D.
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Jeff Wright, post: 398926, member: 799 wrote: Thanks for the idea. It’s not a huge number of points (about 125). However, I don’t believe that I can manually pick up and move each point because they are part of a survey figure. The only way I know of moving these points is to manually edit the northings and eastings in the survey database (found in the survey tab not the prospector tab of the toolspace). I think autocad intentionally makes this process cumbersome to protect the survey data.
I move points from time to time, you have two nodes you can pick from. I use an “X” for the point symbol most of the time. If you click on the center of your symbol you can move the point to where you want it, when I move a point the elevation usually defaults to 0,. The node you can pick above the center point that just moves the text of the point.
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Scott Ellis, post: 399003, member: 7154 wrote: I move points from time to time, you have two nodes you can pick from. I use an “X” for the point symbol most of the time. If you click on the center of your symbol you can move the point to where you want it, when I move a point the elevation usually defaults to 0,. The node you can pick above the center point that just moves the text of the point.
Grab your text file and code it to horizontally offset in the survey database import process. Look into your line work code set for the code to horizontally offset it.
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You will be able to move the 3d polyline between the points but not the survey figures(points) themselves unless you bring those points into a base c3d drawing with no special settings or templates.
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CLICK ON THE SURVEY FIGURE, THAT SHOULD BRING UP THE CONTEXT RIBBON FOR SURVEY FIGURES, CLICK THE EDIT GEOMETRY BUTTON, THIS SHOULD EXPAND THE RIBBON TO INCLUDE BUTTONS FOR EDITING GEOMETRY, LOOK TO THE BOTTOM RIGHT OF THE NEW PANEL AND SEE THE BUTTON THAT LOOKS LIKE TWO CONCENTRIC ARC ARROWS THIS IS THE STEPPED OFFSET TOOL WHICH WILL ALLOW YOU TO OFFSET THE SURVEY FIGURE HORIZONTALLY AND VERTICALLY (THE NEW OBJECT WILL BE A FEATURE LINE NOT A SURVEY FIGURE BUT WILL HAVE ALL OF THE ELEVATION DATA FROM THE SURVEY FIGURE IF YOU DO A DATUM ADJUST OF 0 WHEN OFFSETTING THE LINE).
RRAIN
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Jeff Wright, post: 398926, member: 799 wrote: Thanks for the idea. It’s not a huge number of points (about 125). However, I don’t believe that I can manually pick up and move each point because they are part of a survey figure. The only way I know of moving these points is to manually edit the northings and eastings in the survey database (found in the survey tab not the prospector tab of the toolspace). I think autocad intentionally makes this process cumbersome to protect the survey data.
You’re not able to grip edit the points because they are part of the Survey Database which locks them down pretty tight. Do the stepped offset command described above to get the linework in the right place both horizontally and vertically. Then if your original data is in ascii format do a regular import of the points through C3D (not through Import Survey Data) Points Menu>Import/Export Points>Import Points. Then they will be unlocked and live smart C3D Cogo Points that you can grip edit and drag them back to the line geometry retaining their original descriptions. If you change the OSNAPZ system variable to 1 rather than the default 0 you could even do a Move command and snap from NOD to END with zero worry about messing up an elevation.
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Sorry Warren Smith I was wearing my drafting hard hat and had my hearing protection in so I didn’t even notice that I was yelling!
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