iPOGO V5 Users Group - Help Manual

*Methodology Number 1 of 2*
Command:	11.1
Alpha Alias:	Os PlineVarWidth
Description:	Computes angle points of tangents parallel to and at varying offset distances from a series of known tangents
Data Format:	11.1 Set From Offset PI-Ahead {[Offset PI-Ahead] ... } ;
Problem:	Given points numbered 1 through 6, set points 21 through 26 as shown.
Solution:	11.1 21 1 10 2 25 3 15 4 10 5 25 6 ;

Data Description

Command	11.1	Sets tangents parallel to and offset from a series of known tangents. Allows you to vary the offset distances between the parallel and known tangents. Computes the angle points of the parallel tangents. The initial point of the first parallel tangent will lie on a line normal to the first known tangent at its initial point. The final point computed with the 11.1 command will lie on a line normal to the last known tangent at its final point. You can change how the initial and final points are set by entering zeros for the first and last offset distances.
Set	21	Point number to be assigned to the initial point computed. All subsequent point numbers are automatically assigned from this point number.
From	1	Point number of a previously computed point that lies at the beginning of the first known tangent. The tangent is directed from this point towards the first known Point of Intersection (PI).
Offset	10	Distance between the first known tangent and the parallel tangent. Enter this distance as a negative value if you want the parallel tangent to be set to the left of the known tangent, as directed towards the PI ahead. If you enter 0 (zero) for the first offset distance, the initial point will be computed at the Point of Intersection (PI) of the first known tangent and the tangent parallel to the second known tangent. If you enter 0 (zero) for the final offset distance, the final point will be computed at the PI of the last known tangent and the tangent parallel to the next-to-last known tangent.
PI-Ahead	2	Point number of the point at the end of the first known tangent where it intersects with the second known tangent.
{[Offset PI-Ahead] ... }	25 3	Repeating feature of this command. Continue to enter offset distance values and point numbers to define additional known tangents and their parallel tangents in order to compute the angle points
{[Offset PI-Ahead] ... }	15 4	Repeating feature of this command. Continue to enter offset distance values and point numbers to define additional known tangents and their parallel tangents in order to compute the angle points
{[Offset PI-Ahead] ... }	10 5	Repeating feature of this command. Continue to enter offset distance values and point numbers to define additional known tangents and their parallel tangents in order to compute the angle points
{[Offset PI-Ahead] ... }	25 6	Repeating feature of this command. Continue to enter offset distance values and point numbers to define additional known tangents and their parallel tangents in order to compute the angle points
End Command	;	All commands end with a semi-colon.

Example Command File

$ Example data set for the 11.1 
$  (Os PlineVarWidth) command, Methodology 1

$ Set the initial points.
  0 1 1000 1000 ;
  1 2 1 
        -1 60 0 0 60 
        -2 85 0 0 60 
        -1 20 0 0 15 
        -2 85 0 0 60 
        -2 45 0 0 60 ;

$ Set points for offset line by 
$   using the 11.1 command.
  11.1 21 1 10 2 
                 25 3 
                 15 4 
                 10 5 
                 25 6 ;

$ Setup feature codes with 
$  cmd  feature, layer, color, style, thickness
  15.1     RW     RW     1      1       1 ;
  15.1     CL     CL     3      1       1 ;

$ Turn plot on
  91 ;

$ Activate the RW feature
  15 CL ;
     100 Centerline;
         7 1 1 2 3 4 5 6 ;

$ Activate the RW feature
  15 RW ;
     100 Right of way;
         7 1 21 22 23 24 25 26 ;

Methodology Number 2 of 2

Command: 11.1

Alpha Alias: Os PlineVarWidth

Description: Computes angle points of tangents parallel to and at varying offset distances from a series of known tangents

Data Format: 11.1 Set From Offset PI-Ahead {[Offset PI-Ahead] ... } ;

Problem: Given points 1 through 6, set points 22 through 25 as shown.

Solution:
11.1 22 1 0 2 25 3 15 4 10 5 0 6 ;

Data Description

Command	11.1	Sets tangents parallel to and offset from a series of known tangents. Allows you to vary the offset distances between the parallel and known tangents. Computes the angle points of the parallel tangents. The initial point of the first parallel tangent will lie on a line normal to the first known tangent at its initial point. The final point computed with the 11.1 command will lie on a line normal to the last known tangent at its final point. You can change how the initial and final points are set by entering zeros for the first and last offset distances.
Set	22	Point number to be assigned to the initial point computed. All subsequent point numbers are automatically assigned from this point number.
From	1	Point number of a previously computed point that lies at the beginning of the first known tangent. The tangent is directed from this point towards the first known Point of Intersection (PI).
Offset	0	Distance between the first known tangent and the parallel tangent. Enter this distance as a negative value if you want the parallel tangent to be set to the left of the known tangent, as directed towards the PI ahead. If you enter 0 (zero) for the first offset distance, the initial point will be computed at the Point of Intersection (PI) of the first known tangent and the tangent parallel to the second known tangent. If you enter 0 (zero) for the final offset distance, the final point will be computed at the PI of the last known tangent and the tangent parallel to the next-to-last known tangent.
PI-Ahead	2	Point number of the point at the end of the first known tangent where it intersects with the second known tangent.
{[Offset PI-Ahead] ... }	25 3	Repeating feature of this command. Continue to enter offset distance values and point numbers to define additional known tangents and their parallel tangents in order to compute the angle points
{[Offset PI-Ahead] ... }	15 4	Repeating feature of this command. Continue to enter offset distance values and point numbers to define additional known tangents and their parallel tangents in order to compute the angle points
{[Offset PI-Ahead] ... }	10 5	Repeating feature of this command. Continue to enter offset distance values and point numbers to define additional known tangents and their parallel tangents in order to compute the angle points
{[Offset PI-Ahead] ... }	0 6	Repeating feature of this command. Continue to enter offset distance values and point numbers to define additional known tangents and their parallel tangents in order to compute the angle points
End Command	;	All commands end with a semi-colon.

Example Command File

$ Example data set for the 11.1 (Os PlineVarWidth) command, Methodology 2

$ Set the initial points.
  0 1 1000 1000 ;
  1 2 1 
        -1 60 0 0 60 
        -2 85 0 0 60 
        -1 20 0 0 15 
        -2 85 0 0 60 
        -2 45 0 0 60 ;

$ Set points for offset line by use of 11.1 command.
  11.1 22 1 0 2 25 3 
                15 4 
                10 5 
                 0 6 ;
 

$ Setup feature codes with 
$  cmd  feature, layer, color, style, thickness
  15.1     RW     RW     1      1       1 ;
  15.1     CL     CL     3      1       1 ;

$ Turn plot on
  91 ;

$ Activate the RW feature
  15 CL ;
     100 Centerline;
         7 1 1 2 3 4 5 6 ;

$ Activate the RW feature
  15 RW ;
     100 Right of way;
         7 1 22 23 24 25 ;

Help for this command was last updated: 06/27/2000 11:36:42 PM

iPOGO V5 Help Manual On-Line

Group:Command:

11) RW Alignments11.1 or Os PlineVarWidth

Group:
Command:

11) RW Alignments
11.1 or Os PlineVarWidth