AutoCAD Map 3D :: Datum Conversion Not Shown In WKT
Jun 28, 2012
In our company we use several datums which come in multiple variants, e.g. Pulkovo, MInna and other West African ones. We frequently need to set up alternative datum shifts to comply with client requirements for exact positioning (Oil & Gas Industry). These are usually Molodensky or Bursa-Wolfe shifts.
I have done a fair amount of experimenting with the datum creation wizards, and within AutoCAD the shifts seem to work correctly, but I am puzzled that when one views the details of the Datum Transformation from the library, the transformation parameters are not shown as part of the WKT string. Also, presumeably consequently, when data from a drawing with a coordinate system based on this shift is exported to ESRI shapefile format, the transforamtion parametere are not shown in the .prj file.
I do not know whether I have missed a stage in the creation process, or if this this is a bug. It also seems odd that when viewing the details of a user-defined datum, there is no obvious clue as to what the transformation parameters are for that datum, other than finding a transformation with the same code name.
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May 15, 2012
how to create a new datum conversion, but it has six parameters...It is a similarity transformation i want to put in a new configuration.
following data are:
centroid: x=453106; y=7076452
traslation in X=-179.2
traslation in Y=-386.302
scale in ppm= -832.154
ang in rad = 2.5*10^6
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May 15, 2012
how to create a new datum conversion, but it has six parameters...It is a similarity transformation i want to put in a new configuration.
following data are:
centroid: x=453106; y=7076452
traslation in X=-179.2
traslation in Y=-386.302
scale in ppm= -832.154
ang in rad = 2.5*10^6
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Dec 4, 2012
We do not use "A" as our default datum ID.
Instead of manually changing this each time I place a Datum target can I change the default?
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Jan 9, 2012
in inv 2012, if I create a new part with adaptivity within an assembly the datum of the sketch ends up wherever, if I break links and remove the adaptivity, is it possible to move the absolute datum of the sketch to a decent position within the sketch?
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Oct 18, 2012
“Datum” in the “compute material”,
I’m not sure about the correct choice for the “datum” to proceed in plotting “mass haul diagram”
What might be the proper selection for the “datum”?
Software: AutoCAD 2014, AutoCAD C3D, AutoCAD M3D, Revit
Windows 7 (Ultimate 64 bits),
Firefox 20.0,
Kaspersky 2013.
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Jul 31, 2003
Placing a Datum Target Identifier on a dwg. When your are in the Datum Target dialog box under Dimension, you have to type in a number indicating the diameter of the datum target circle. Normally you can't put in a diameter symbol before the number, but I just found out a way.
Make sure your Num Lock light is on. While holding down the ALT button on your keyboard, type in 0216 using the numeric keypad. This will put in a diameter symbol.
ALT 0216 diameter symbol
ALT 0176 Deg symbol
ALT 0177 Plus / Minus symbol
Another problem is, after placing the Datum Target you can't dimension to it. That can be solved by putting a sketch of a circle (phantom line) with it's diameter and locating dimensions on the dwg view. Then you can placing the Datum Target Identifier on the the circle.
A wish list to Autodesk:
Allow dimensioning to the symbol
Have a diameter symbol already in the dialog box
Have a option that sizes the datum circle diameter
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Apr 14, 2012
I have a profile view that shows two ditch profiles in it, for right and left ditch. They are similar in elevation, so they overlap some in the profile view. Is there a way to show one of them at a set interval below its actual datum, like say, 5'? Short of drawing in a dummy profile or expolding it - which I'm going to do shortly....
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May 14, 2012
Can more than 4 characters be used in the bottom of a datum target?
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Jul 13, 2012
is there a way to auto project datum planes that are square to the sketch?
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Nov 19, 2012
I have found after my last save, the Datum Planes of the assembly have just lengthened in two directions monstrously for no reason. I checked to see if it was an unassebled straggler but cant find anything. Is there a way of knowing why it does this.
Check attached image, the dot is a machine 20 metres high and the datum plane seems to reach the nearest neighbourhood for some reason.
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Dec 5, 2012
I've set the corridor's surfaces to use the corridor boundariy & the datum's overhang correction to top links & bottom links, but for some reason it doesn't respect the corridor's boundary.
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Dec 4, 2013
Am trying to create a corridor datum surface that goes around Protruding lanes but it seems I am Short on knowledge here. the outer lane, LaneOutSideSuper has a greater thickness than the inner lane (same sub assembly) and I would like my datum surface (actually, not only the datum surface but other layer surfaces) to attach its self around the bottom links of both surfaces but it shoots from the Crown_sub to the outer lane Datum.
I have used the bottom links overhang and adding feature lines to the surfaces but it doesn't seem to cut it. Attached is an illustration of the section view. The top figure is what I hope to get and below is what i seem to get.
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Jun 29, 2012
I am being requested that I add a plunger/ anchor to the datum identifier within/ on a GD&T feature control frame (see attached). This is per ASME Y14.5M - 1994 and Autodesk IV states that it meets this spec. I also checked with a couple of 'reliable sources' and they also stated that it needs to be there. I was hoping that it was a personnel preference/ company standard type thing.
How to change the setting to add it within the control frame generator?
2012- all patches & SP's
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Aug 28, 2012
i created section view as in pic1. In Bands, Existing surface elevation labels at existing surface grade breaks, top of road elevation labels at top grade breaks, datum is the same. Can i add existing surface elevation labels at top of road grade breaks? (pic2)
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Apr 3, 2012
Autodesk Inventor 2010 .idw - How do I attach a Datum Identifier symbol to the bent leader of a hole or diameter callout such that when the dimension is moved, the symbol will follow?
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Feb 7, 2013
My problem added with pic ... I want to make volume calculate for sample road project. When I try to compute materials I cant use Corridor surface for DATUM... There is only target surface on option..
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Jan 18, 2012
I have a question regarding viewports. We received drawings from our sub-contractor and we noticed that there is something wrong with their drawing, so I decided to make the modification, but when i opened the file and switched it to layout tab, I was not able to see the line for their respective viewports. But if you are going to double click that drawing, the viewport will be visible.
One more thing is, when i found the viewport and re-scale the things that i want to show inside that viewport, I was confused because in the model tab there are only two drawings which is the plan layout of our project, (the section view and the top view). what they want to show in layout tab is only the topview, so, when i tried to check they used only the top view, yes, but how? because in model tab as what i have said before "THERE'S ONLY 2 DRAWINGS" I am wondering if the make some tricks with this.
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Oct 21, 2013
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If you go under Parcels Tutorial>Exercise 1: Creating Parcels from AutoCAD Objects, you can see exactly what I am working with.
C3D 2014 SP1
DELL Precision T3600
Intel Xeon E5-1650 @ 3.20GHz
NVIDIA QUADRO 4000 Dual Monitor
32 GB RAM / Win7 Pro 64-bit
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Dec 21, 2013
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Feb 8, 2012
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Inventor 2014 64-bit SP1
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