iPOGO V5 Users Group - Help Manual

*Methodology*
Command:	-3.1
Alpha Alias:	-Direction IntOS
Description:	Computes points by dropping perpendiculars to a bearing parallel and offset to a known line
Data Format:	-3.1 Set From Bearing Offset From {[From]...} ;
Problem:	Given points 1, 2, 3, 4, 102 and 111. Set points 21, 22, 23 and 24 as shown.
Solution:	-3.1 21 102 102 111 -38 1 2 3 4 ;

Data Description

Command	-3.1	Defines a line or bearing parallel to a known line at a specified offset distance. Computes points on the offset line or bearing by dropping perpendiculars from known points. Bearings may be entered by using quadrant definition and angle, or by using point definition.
Set	21	Number of the initial point to be computed.
From	102	Number of a previously computed point located on the known line.
Bearing	102, 111	Direction of the known line.
Offset	-38	Distance between the known line and the parallel line or bearing on which the points being computed will be set. Note: If you want the parallel line to lie to the left of the known line, you must enter this distance as a negative number.
From	1	Point number through which the perpendicular is drawn to produce the point of intersection with the parallel line or bearing.
{[From]...}	2 3 4	Repeating feature of this command which allows you to enter as many points as needed. Each point will produce an additional point of intersection. Any additional points that are computed will be numbered automatically from the Set point number.
End Command	;	All commands end with a semi-colon.

Example Command File

$ Example data set for -3.1 
$    (-DIRECTION INTOS) command.

$ Set previous points.
  0 1 2230.0 1833.3
    2 2239.4 1943.5 
    3 2231.4 2032.5   ;

  1 4 3 2 3 1e9 2 3 0 ;

  0 
    102 2073.4 1648.5 
    111 2085.4 2196.8 ;

$ Set points using the -3.1 command.
  -3.1 21 102 102 111 -38
        1 
        2 
        3
        4 ;

$ Set additional points for drawing lines.
  1 1002 21 22 21 200 ;
  1 1003 24 23 24 100 ;
  1 1000 1 2 1 1E9 1 2 0 ;
  1 1001 4 3 4 1E9 3 4 0 ;

$ Setup plotting parameters with 
$   feature, layer, color, style, thickness
  15.1 L1 LINES1 7 1 1;

$ Turn plot on
  91;

$ Activate the current feature
  15 L1 ;
          $ Draw the lines.
            7 1 102 111 ;
            7 2 1002 1003 ;
            7 3 1 21 ;
            7 4 2 22 ;
            7 5 3 23 ;
            7 6 4 24 ;
            7 7 1000 2 1001 ;

Help for this command was last updated: 06/28/2000 12:02:03 AM

iPOGO V5 Help Manual On-Line

Group:Command:

3) Brg-Brg Intx-3.1 or -Direction IntOS

Group:
Command:

3) Brg-Brg Intx
-3.1 or -Direction IntOS