iPOGO V5 Users Group - Help Manual

*Methodology*
Command:	7
Alpha Alias:	Inverse Area
Description:	Prints inverses, curve data, and area of a closed figure
Data Format:	7,LineID From {RadiusPt} To {[{RadiusPt} To]...};
Problem:	Given point 2, 3, 6 and 8, and curve center 7. Print bearings and distances from point-to-point, coordinates, curve data and area for the defined closed figure.
Solution:	7,25 3 6 7.1 8 2 3 ;

Data Description

Command	7	Assigns a number which is used to identify the defined area. Prints the inverses in sequence. Prints curve data appended to the inverse data. Prints area for a closed figure. If you want the output from this command to include the area of a closed figure, the last point you enter must be the same as the first point. If one side of the figure is a curve, you must enter three points as the Point of Curvature (PC), radius point (RP) and Point of Tangency (PT) in sequence. The radius point must be equidistant from the PC and PT, or an error message will display
LineID	25	Any integer which will be used to identify the lot. For example, 7,25 will compute an inverse area for the points provided and identify it as lot 25. Beginning with Version 5, the LineID may be an alpha-numeric word such as Lot-123a or Parcel_123a. This value is attached to the graphics as extended entity data when exported to DXF.
From	3	Starting point number of the series of lines and/or curves to be printed. If you want the inverse of a curve, enter the PC point number.
To	6	Point numbers that define the subsequent points of the area and are entered clockwise from the starting point. A range of increasing or decreasing sequential point numbers may be entered using only the first and last point numbers. Enter the first point number then the last point number with a preceding hyphen, e.g., 1,-5. The output will then show all the inverses between those two points as though the data entry had been 1,2,3,4,5. Entering the points counter-clockwise will result in a negative area.
{RadiusPt}	7.1	Radius point number if you are defining a curve. Append .1 to this number to indicate it as the radius point. Enter this value as a negative number if the curve has a delta angle greater than 180° (i.e., a cul-de-sac).
{[{RadiusPt} To]...}	8 2 3	Repeating feature of this command. Enter the point numbers to define the positive area in a clockwise fashion. If one of the boundaries is a curve, enter the radius point number before the PT point number.
End Command	;	All commands end with a semi-colon.

Example Command File

$ Example data set for the 7 (Inverse Area) command

$ Set the points
  0 2 0 0 ;
  1 3 2 -4 32 46 20  53.67  ;
  1 6 3 -1 74 21 30 115.37  ;
  1 8 2 -2 77 23 17  86.653 ;
  5 7 6 8 3 159 159 ;
        
$ Setup feature codes with 
$  cmd  feature, layer, color, style, thickness
  15.1    L1     LINES1   7      1       1 ;

$ Turn plot on
  91 ;

$ Print out a text label in the output window
  100 Example Lot Closure ;

$ Activate the L1 feature
  15 L1 ;

          $ assign a repeating heading
            15.2 "Lot Number" ; 

               $ inverse the lot closure
               7 25 3 6 7.1 8 2 3 ;

Help for this command was last updated: 08/07/2001 9:07:29 PM

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Group:Command:

7) Inverse7 or Inverse Area

Group:
Command:

7) Inverse
7 or Inverse Area