iPOGO V5 Users Group - Help Manual

*Methodology*
Command:	61
Alpha Alias:	Define Area
Description:	Defines perimeter of trial figure to be set with an exact area
Data Format:	61 Area From To {[To].. } ;
Problem:	Given the boundary of a tract of land defined by points numbered 1 through 9 and the trial location of a line of division numbered 10 and 11 separating Parcels One and Two. Relocate the line of division radial to point 2 to produce an area of exactly three acres for Parcel One.
Solution:	61 -3 1 2.1 10 11 5 -9 1 ;

Data Description

Command	61	Defines a trial figure by point numbers which follow the boundary. Must be executed before the 62 and 63 commands are used to compute the exact area of a figure. The 61 command does not produce any output. It stores the area and boundary of a figure for use in the 62 and 63 commands.
Area	-3	Exact area in square feet of the trial figure which will be computed by the 62 or 63 commands. Enter this value as a negative number if you want the area to be printed in acres. Identical results would be produced if you entered 130680 or -3 as your area value.
From	1	Initial point number of the series of points to be entered defining the trial figure.
To {[To].. }	2.1 10 11 5 -9 1	Series of point numbers defining the figure. These points must be entered in a clockwise sequence. The final point number entered must be the same as the first point number entered as your From value. A curve is defined by entering the point number of the radius point between the two points on curve. Append .1 to the radius point number to indicate it as a radius point. If the central angle is greater than 180°, precede this value with a minus sign. If you want to define a series of sequential points, enter the first and last point numbers in the series. The last point number must be preceded by a hyphen. Example: Enter 1,-50 to define the range of points from 1 through 50, inclusive.
End Command	;	All commands end with a semi-colon.

Example Command File

$ Example data file for 61 (Define Area) command

$ set known coordinates of outside boundary
  0 1 4885.752 4606.923
    5 4513.931 4888.633
    6 4547.858 4694.840
    7 4611.204 4479.838
    8 4737.959 4471.475
    9 4907.536 4509.325 ;

$ set curve radius point
  1 2 1 1 9 9e9 425 ES;

$ set point 4 on known bearing at 375' from point 5
  1 4 5 -1 50 15 22 375;

$ set point 3 on line from radius point 2 to point 4
  1 3 2 2 4 425;

$ set trial point 10 on curve with left delta angle
  2 10 2 2 1 -29 -50 -8 425;

$ define point 2 as a radius point
  14 2 1e9 1 2 0;

$ set trial point 11 on line from 5 to 4 at 100'
  1 11 5 5 4 100;

100 Total boundary;
   -7 1 1 2.1 10 2.1 3 4 11 5 -9 1;

100 Trial division line;
    7 1 10 11;

$ define trial boundary for 3 acres 
$   exact calculation with the 61 command
$ 61 -3     1 2.1 10 11 5 -9 1 ;    $ using acres
  61 130680 1 2.1 10 11 5 -9 1 ;    $ using sf

$ trial line defined for radial shift
  62 10 11 2 ;

$ define feature codes for plotting
  15.1 LOT1 LOT1 1 1 1;
  15.1 LOT2 LOT2 3 1 1;

$ Turn plot on
  91 ; 

$ define a repeating feature description
  15.2 "Closure Lot" ;

$ activate the LOT1 feature code
  15 LOT1 ;
     7,1 1 2.1 10 11 5 -9 1;

$ activate the LOT2 feature code
  15 LOT2 ;
     -7,2 10 2.1 3 4 11 10;

$ reset the repeating feature description
  15.2 "";

Help for this command was last updated: 06/28/2000 12:22:42 AM

iPOGO V5 Help Manual On-Line

Group:Command:

60) Special Areas61 or Define Area

Group:
Command:

60) Special Areas
61 or Define Area