Analyzing older deeds – closure, Autodesk Land Desktop 3
Older deeds, for example, those based on surveys which report bearings to the nearest five minutes and distances to the nearest 3 inches, almost always have an error of closure associated with them, typically less than a foot. I understand that better evidence will almost always govern over bearings and distances, but nonetheless as a preliminary tool, or in cases where no better evidence can be found, it seems reasonable to adjust the bearings and/or distances in order to “close the deed”. In some cases, it makes sense to hold one distance or one bearing as superior, and in other cases, to distribute using some uniform distibution process, i.e. compass rule. In other cases, it might be appropriate to hold bearings and adjust distances, i.e. Crandall. I understand that judgement is required and that mathemagics has its limitations.
My question has to do with how to do this stuff in Autodesk Land Desktop 3. I know this is older software, but would appreciate any help or suggestions that might be offered.
If I use “Lines/Curves > By Direction” and start at the Point of Beginning of the deed, I can draw each of the lines of the lot, and the “error of closure” can be seen graphically. If I subsequently use “Points > Create Points > Manual” I can create a point at the beginning and end of each line drawn.
Now, it seems that “Analysis/Figures > Traverse Loops” is the area in the software where I might be able to adjust these deed figures, with many different options (horizontal adjustment can be None, Compass, Transit, Crandall, or Least Squares). But, it seems no matter what I do, I get an error message after defining the loop, when I attempt to “Adjust Loop”.
The message reads: “Error: First Occupied Point does not have known coords.”. If I list the points, they’re all in the point database. I have searched online and it seems that this might have something to do with the raw data file, which I do not import into Land Desktop (rather, I typically just import an ASCII text file containing the points PNEZD).
Any ideas how I can get this to work? Or, should I buy Carlson now?
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