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input and check parcesl on differnt basis of bearing

12 REPLIES 12
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Message 1 of 13
rfg018
426 Views, 12 Replies

input and check parcesl on differnt basis of bearing

I have serveral record maps, they are all on different basis of bearing.

In LDT, this was simple, just change the north rotation, and draw the line with the bearing on the map, then reset the north angle.

 

In Civil 3d, the only way I can think of, is to draw the parcels using the hard copy map bearing, then rotate the line work to the common basis of bearing.

 

My problem is that after I rotate the line wrok, there is no way to compair the bearing to the orginal or another map.

 

My questions is:

Is there a way to compare line work bearing to a hard copy map on a different basis of bearing without rotating all my lines, simular to LDT.

Is there a better way to draw lines based on different Basis of bearing.

 

Transformation and UCS has not effect on drawing or listing line  bearing and distance.

 

Thanks

12 REPLIES 12
Message 2 of 13
_Hathaway
in reply to: rfg018

Yes, make each record entitiy such as a plat, survey map or deed in its own drawing on it bearing base. Then simply insert it or xref it into your base map. I prefer Xref for the automatic updates if you revise the source data. I have used this scenario on thousands of documents and it works just fine. Take it a step further and start cataloging all your record data based on location and over time you will build up a nice database and it will reduce duplication of effort.
Message 3 of 13
ericcollins6932
in reply to: rfg018

Scan your hardcopy to PDF and do a PDF underlay, rotating as necessary.

Eric Collins, P.Tech.(Eng.)

Win 10
Intel i7 9700 @ 3 GHz
16 GB RAM
Civil 3D 2019
Message 4 of 13
_Hathaway
in reply to: ericcollins6932

Scan? Really....I don't see how that could remotely be useful for anything requiring any sort of accuracy. Plus, you can't really 'use' a scan, it's just an image.
Message 5 of 13
ericcollins6932
in reply to: _Hathaway

Pdf's at scale are just as accurate when printed at scale. Check out Bluebeam. Your issue was you wanted to check parcels. I would think if you were diligent, checking would be trivial with this technique.
Eric Collins, P.Tech.(Eng.)

Win 10
Intel i7 9700 @ 3 GHz
16 GB RAM
Civil 3D 2019
Message 6 of 13
rl_jackson
in reply to: rfg018

I would agree that PDF file created by acad are accurate but in the surveying profession that is a luxury not the normal when you obtain your research from county's that scan and convert documents

Rick Jackson
Survey CAD Technician VI

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Message 7 of 13

You work with what you have... and if all you have is a badly scanned map, you make do.

Eric Collins, P.Tech.(Eng.)

Win 10
Intel i7 9700 @ 3 GHz
16 GB RAM
Civil 3D 2019
Message 8 of 13
_Hathaway
in reply to: ericcollins6932

Eric, in the surveying profession this method would be utterly useless. I'm sure it has it's uses but for comparing parcels like the OP requested it would be useless. The only way to accomplish what he is asking accurately is to accurately recreate the record documents and either block it or save it in its own dwg file or xref a dwg file and then move and rotate the accurate data around as he pleases.
Message 9 of 13
rfg018
in reply to: rfg018

Scan a drawing is not an option.  Using Xref, is an option, but still not great.

 

Our draiwing are very preicise.  By enter the data, I can verify that the map is correct (somer are not).  There are many maps that are not to scale, so scanning would not work. 

 

 When we are finish, we use the drawings for setting monuments, constuction staking and takeoff.  So when we change the bearing and distane of a line, the line must change, not just the text.

 

The problem using xref is managing the extra files. However this option may work for me as backup data.

I need to look that this more, thanks for this option.

Message 10 of 13
AllenJessup
in reply to: rfg018

The separate file with an insert or Xref works fine. However we often deal with over 100 deeds at once. We create an area in the drawing where we plot the parcels using the deed bearings, copy the parcel lines and make the copy into a Group. Then we move and rotate the Group as necessary. If we need to adjust the parcel because of misclosuer. We adjust the copy before turning it into a group.

 

So we still have the original plotting that has been checked for closure and an adjusted copy that is in the drawing coordinate system.

 

Allen



Allen Jessup
Engineering Specialist / CAD Manager

Message 11 of 13
AllenJessup
in reply to: rfg018

I've attached a screenshot of what it looks like. It doesn't contribute to the drawing size very much since simple lines and curves are miniscule when compared to Civil 3D objects.

 

Allen



Allen Jessup
Engineering Specialist / CAD Manager

Message 12 of 13
ericcollins6932
in reply to: _Hathaway

It all depends what you have on the hardcopy plan. You can recreate it if you have enough data to do so. Many times, hardcopy plans that I have do not. If I want to get an idea that they are representative, a quick scan and overlay will provide an answer as to whether or not they make sense.

 

And then one sends a crew to the field to ascertain the truth as a plan is simply a representation of the survey. Without field notes to back it up, it's just a picture.

 

 

Eric Collins, P.Tech.(Eng.)

Win 10
Intel i7 9700 @ 3 GHz
16 GB RAM
Civil 3D 2019
Message 13 of 13
_Hathaway
in reply to: ericcollins6932


@ericcollins6932 wrote:

It all depends what you have on the hardcopy plan. You can recreate it if you have enough data to do so. Many times, hardcopy plans that I have do not. If I want to get an idea that they are representative, a quick scan and overlay will provide an answer as to whether or not they make sense.

 

And then one sends a crew to the field to ascertain the truth as a plan is simply a representation of the survey. Without field notes to back it up, it's just a picture.

 

 


Eric, what you're suggesting has nothing at all to do with the accurate, detailed analysis that the OP is asking about.  What you're referring too sounds like an architect or planner tryijng to check someone elses plans or something similar. We're talking about detailed survey datat that requires accuracies to 0.01 and angles to the second.  A pdf will do neither.

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