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iPOGO V5 Help Manual On-Line |
Group: |
900) Sub Commands |
Methodology | |
| Command: | 7E7 |
| Alpha Alias: | DAR |
| Description: | Defines distance by arc and radius |
| Data Format: | 7E7 Arc Radius |
| Problem: | Given point numbers 2 and 3, set point number 4 using the arc length of 125.17 feet and radius of 140 feet. |
| Solution: | 1 4 3 2 3 7E7 125.17 140 ; |
Data Description
| Sub-Command | 7E7 | Non repeating sub-command used to compute a distance by modifying the last bearing used and applying the specified arc and radius length. Used within other commands or sub-commands which request a value for distance.
The 7E7 sub-command reverses the last bearing used 180° and adds the angle resulting from the input arc and radius to define a new bearing. The bearing saved is directed toward the point to be set. A point is then set on this new bearing at a distance equal to the Radius. The 7E7 sub-command depends upon a previously defined bearing which was either entered just before 7E7 or has been retained by the 9E9 or -9E9 sub-commands. If used in conjunction with 9E9 or -9E9, the bearing retained is altered by 7E7 and is directed from the radius point to the point being set. Note: The 8E8 sub-command and the 7E7 sub-command are complimentary. When used with 9E9 and -9E9, they provide the means to compute coordinates continuously around any previously defined configuration of arcs and tangents. |
| Arc | 125.17 | Arc length in feet. If you enter a positive value, the angle will be turned clockwise. If you enter a negative value, the angle is turned counterclockwise. |
| Radius | 140 | Radius length in feet. |
| No End of
Sub-Command | | No end of Sub-Command is needed for 7E7. |
Example Command File
$ Example data file for the 7E7 (DAR) command
$ set initial points
0 3 1000 1000 ;
1 2 3 -4 25 36 48 140 ;
$ set point 4 with the 7E7 sub-command
1 4 3 2 3 7E7 125.17 140 ;
$ define feature code
15.1 CL CenterLine 7 1 1 ;
$ turn on plot
91 ;
$ activate the feature code
15 CL;
100 Inverse the solution;
7 1 4 3 2 3.1 4 ;