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rwatson654
Posts: 285
Registered: ‎06-27-2008
Message 1 of 12 (647 Views)
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Survey - Sewer Structure Invert

647 Views, 11 Replies
03-08-2013 11:25 AM

I would like to find out how other companies handle inverts of sewer structures.  Our field crew dips  sewer structures (measures down to the invert from the top of the structure)  which is probably the norm.  The distance is recorded in our field book.  I created an expression for our sewer point labels that allows the Tech to enter this distance then invert of the structure is displayed.  The expression is simple, top-distance=invert.  This works find unless the survey points have to be inserted again.  The invert is lost and has to be recreated.  Previously it was setup to just type the invert in after calculating.  Please make suggestions on how your firm handles this.  I would like something simple to use that stays with the points.

C3D 2013 (latest updates)

Win 7 Pro, 64-bit

16 GB RAM

 

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TRogers
Posts: 1,206
Registered: ‎09-05-2007
Message 2 of 12 (641 Views)

Re: Survey - Sewer Structure Invert

03-08-2013 12:13 PM in reply to: rwatson654

Are you wanting the actual "measure down" value?  For example, the 6'?

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Mentor
rwatson654
Posts: 285
Registered: ‎06-27-2008
Message 3 of 12 (637 Views)

Re: Survey - Sewer Structure Invert

03-08-2013 12:16 PM in reply to: TRogers

No we would like the invert, which is the top of the structure elevation - measurement down.  The crew shoots the top of the structure and we have a point with a surface elevaiton there.

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TRogers
Posts: 1,206
Registered: ‎09-05-2007
Message 4 of 12 (633 Views)

Re: Survey - Sewer Structure Invert

03-08-2013 12:24 PM in reply to: rwatson654

In the Structure Properties, you can input these values...

 

4-4-2012 8-46-10 AM.png

 

All these values can be added to the label style.

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TRogers
Posts: 1,206
Registered: ‎09-05-2007
Message 5 of 12 (631 Views)

Re: Survey - Sewer Structure Invert

03-08-2013 12:27 PM in reply to: rwatson654

Basically, if you set your sump to 0.00, then your invert will be your sump elevation.  Just bad wording by the Autodesk developers.

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rwatson654
Posts: 285
Registered: ‎06-27-2008
Message 6 of 12 (613 Views)

Re: Survey - Sewer Structure Invert

03-08-2013 01:24 PM in reply to: TRogers

So an imported survey point would be a structure and not a point style with a block.  Have not tried that but will look into it.  What would happen if the points wasre-inserted into the drawing from the survey database.

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stacy.dunn
Posts: 381
Registered: ‎10-03-2008
Message 7 of 12 (603 Views)

Re: Survey - Sewer Structure Invert

03-08-2013 01:41 PM in reply to: rwatson654

If you are talking about labeling a sewer invert on a survey with a point label, you can use an expression combined with your measure down in a UDP (user defined property) field.  You can create a UDP in your template that can be used to store your field measurements.  This can be imported with your main point data or just the measure down itself.  Once the data is imported, you can use this data in an expression to build your label. 

 

If you re-insert the points, you will also need to re-insert the UDP data.  It is an extra step, but an easy one.  Keep in mind that you will also need corresponding point import file formats for the additional data.

 

 

Stacy Dunn
Distinguished Mentor
rl_jackson
Posts: 684
Registered: ‎01-20-2008
Message 8 of 12 (602 Views)

Re: Survey - Sewer Structure Invert

03-08-2013 01:42 PM in reply to: rwatson654

You could also look at utilizing UDP's which would basically do the same thing, put without all the hassel of Pipe Networks. There are tutorials in the help that basically walk you through a similar senario.

 

****Stacy bet me to the punch****

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Distinguished Contributor
mikehathaway2942
Posts: 245
Registered: ‎10-13-2009
Message 9 of 12 (536 Views)

Re: Survey - Sewer Structure Invert

03-11-2013 12:47 PM in reply to: rwatson654

We dip hundreds if not thousands of structures a year and merely not the info in the field book and then add a multileader with the pertinent info such as size, depth, flow, flow direction, invert accuracty, etc..... to the symbol.  Haven't had any issues yet.

 

While I realize there is probably a better way like creating a custom attribute for structures and then having the crew enter that infomation in the code.  I feel there is no need to overcomplicate the simple things.

Active Member
jcaughman
Posts: 7
Registered: ‎02-13-2001
Message 10 of 12 (494 Views)

Re: Survey - Sewer Structure Invert

03-12-2013 06:37 AM in reply to: rwatson654

We 'shoot' the invert in the field.  We'll take a shot on the SMH/DMH, followed by a separate shot on the invert.  This makes the invert shot a point in C3D.  We code the shot so that it has a unique symbol and label ie:  15"RCP(W).  Also, we use linework to join the two inverts of a pipe and add a label to the pipe.  It's all automated in C3D.

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