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
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
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.
We do not use "A" as our default datum ID.
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Software: AutoCAD 2014, AutoCAD C3D, AutoCAD M3D, Revit
Windows 7 (Ultimate 64 bits),
Firefox 20.0,
Kaspersky 2013.
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.
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ALT 0216 diameter symbol
ALT 0176 Deg symbol
ALT 0177 Plus / Minus symbol
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A wish list to Autodesk:
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2012- all patches & SP's
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File 1
[URL]....
File 2
[URL]....
File 3
[URL]....
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