As an example, start the LINE command and pick a starting point on the screen. Then when asked to “specify the next point” type in ‘bd (Bearing and Distance) and ENTER. Your command prompt now changes asking you to enter a Quadrant and your cursor also changes to allow you to see and graphically select a Quadrant, followed by prompts for the Bearing and Distance. These transparent commands can also be accessed through the Coordinate Geometry toolbar in Map.
]]>Your first thought might be that this is easy. In the Terrain Model Explorer you create a new surface. Then under the new surface you look at your options for TIN Data then rightclick on Point Files. Under Point Files there is an option to Add Points From AutoCAD Objects. This will sample the points at the vertices of all the selected 3D faces. The problem here is Land Desktop is only sampling information from the corners of these 3D faces, not the association between the points. So when Land Desktop builds the new surface it does not have any breakline information and will just connect the points by their proximity to one another. Therefore, it is very likely that your new surface will not look exactly like the 3D faces that you started with.
So, what can you do to get an accurate recreation of this surface? You need to treat the 3D faces as breaklines. Then it will triangulate exactly like the original surface. The problem is that you can’t create breaklines from 3D faces. Somehow the 3D faces need to be exploded. The next problem is that AutoCAD cannot explode a 3D face. There are several lisp routines that you can find on the Internet and download for free that will explode a 3D face. The one that I use is called 3dfto3dp.lsp and can be downloaded from Dotsoft. This converts your 3D faces to closed 3D polylines. Now the AutoCAD Explode command will explode the 3D polylines to 3D line segments. Finally, something that you can use to create breaklines.
Not so fast. If you look closely at your drawing you will find that you have duplicate lines everywhere. This is because all of your original 3D faces overlapped each other. You need to use the Drawing Cleanup tools in Map to delete the duplicate objects. Select Map > Tools > Drawing Cleanup. Use the selection options to select all of the 3D lines. Then set the cleanup options to delete duplicate objects.
Now that you have individual 3D lines you can add them to your surface as breaklines. Then build your surface from the breakline data and you will have an exact copy of the original surface.
]]>The process to create a Legal Description if you are using Land Desktop is to first define the Parcel(s) in Land Desktop using any of the Parcel definition or sizing commands. Then Export the Parcel(s) to a LandXML file. Next launch the LandXML Reporting program and open the LandXML file containing the Parcel(s).
Select the Forms tab and expand the Parcel Report Forms folder. Pick the “General Legal Description for Parcels” form.
Then select the Settings tab. Enter any desired custom setting including Units, Precision, or even personal information.
Finally, select the Output tab. Choose the desired Parcel from the list or enable the Select All Parcels option. Click the Append to Repor”button to generate the Legal Description.
The Legal Description can now be printed, saved to an HTML file, or you can copy and paste it into a word processor. If it is not in the exact format you want you can modify the report settings and generate it again or just use this as the base to modify manually in your word processor. Either way it should save you a lot of time over creating the Legal Description manually.
]]>Formula function symbols  
Symbol

Function

+  addition 
–  subtraction 
*  multiplication 
/  division 
^  exponent 
(  open parenthesis 
)  closed parenthesis 
ABS  absolute value of a number 
ACOS  arccosine of a number 
ASIN  arcsine of a number 
ATAN  arctangent of a number 
COS  cosine of a number 
COSH  hyperbolic cosine of a number 
EXP  e raised to the power of a number 
LOG  logarithm of a number to a specified base 
LOG10  base10 logarithm of a number 
POW10  number raised to a power of 10 
ROUND  rounds to the closest integer 
SIN  sine of a number 
SINH  hyperbolic sine of a number 
SQRT  square root of a number 
SQR  square of a number 
TAN  tangent of a number 
TANH  hyperbolic tangent of a number 
TRUNC  number truncated to an integer 
Using this process you can create labels that perform almost any conversion or mathematical function that you can imagine. So take a little time to think about how you might be able to use this functionality to your advantage, and happy labeling!
]]>By design, Land Desktop will automatically create a Dimension Style Override for your current Dimension Style. This Style Override automatically sets several values, but the most important are the Overall Dimension Scale and the Dimension Text Style. These values come from the Land Desktop “Drawing Setup command”. If you modify or remove the Dimension Style Override Land Desktop will recreate it the next time you use a Land Desktop command. So the best way to control your Dimensions is to setup a Dimension Style that sets the arrow size, text size, and all other dimension variables to the height that you would like them to plot and then control the Dimension Scale by setting the Horizontal Scale in the Drawing Setup command.
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