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iPOGO V5 Help Manual On-Line |
Group: |
1) Bearing Comps |
Methodology | |
| Command: | -1.1 |
| Alpha Alias: | Set StaOsCur |
| Description: | Computes offset points radially along centerline curve |
| Data Format: | -1.1 Set RadiusPoint From StartingStation Station Offset {[Station Offset]...} ; |
| Problem: | Given point number 110 at the centerline radius point, and point number 111 lying on the centerline and having a station of 12+54.96. Compute offset points 1, 2 and 3 radially to the curve. |
| Solution: | -1.1 1 110 111 1254.96
1327.26 -40.51
1375.0 -60
1433.67 -75.21 ; |
Data Description
| Command | -1.1 | Computes offset points radially from the curved portion of a stationed centerline. |
| Set | 1 | Point number to be assigned to the first offset point you want to compute. |
| RadiusPoint | 110 | Number of the radius point for the centerline curve along which the offset points are to be set. The centerline is directed as the centerline stations increase. If the curve deflects to the left, enter this value with a minus sign. If the curve deflects to the right, enter the radius point as a positive number. |
| From | 111 | Point number having a known station and lying on the centerline tangent. The tangent offsets are computed from this point. |
| StartingStation | 1254.96 | Station of the From point.
Note: Station values are entered without the plus (+) sign. For example, 10+23.68 is entered as 1023.68. |
| Station | 1327.26 | Station of the point on the centerline curve from which a radial offset is to be computed. Any station may be entered, but only those stations lying between the Point of Curvature and the Point of Tangency are relevant. No permanent coordinate is computed for the station. |
| Offset | -40.51 | Distance from the centerline to the offset point. An offset to the left of the centerline is entered with a minus sign. An offset to the right of the centerline is entered as a positive value and has no sign. Any offset, including 0, may be entered. |
| {[Station
Offset] [Station Offset]...} | 1375.0
-60 1433.67 -75.21 | Repeating feature of this command. Continue entering station values and offset distances for additional points. Any additional points computed in this command will be numbered in an increasing order if you enter the Set point as a positive value. If you enter a negative number, additional points will be numbered in a decreasing order. |
| End Command | ; | All commands end with ; (semi-colon). |
Example Command File
$ Example data set for -1.1 command
$ Set preliminary points.
0
110 1970.0 830.0
111 2180.0 750.0 ;
$ Set point 112 from point 110
$ using the distance from point 110 to point 111.
$ 1E9 subcommand calculates distance
$ from 2 points and applies a correction factor.
1 112 110
-1 60 0 0 1E9 110 111 0 ;
$ Set points 1, 2, 3 with -1.1 command.
-1.1 1 110 111 1254.96
1327.26 -40.51
1375.00 -60.00
1433.67 -75.21 ;
$ Set additional point 1000 to draw lines.
1 1000 111
-3 69 8 44 200 ;
$ set additional points 1001 thru 1003
$ using bearing distance intersection command 4
4 1001 110 110 1 110 111 1E9 110 111 0
110 110 2
110 110 3 ;
$ Set additional point 1004 to draw lines.
1 1004 1
111 1000 250 ;
0
1005 2213.8 1136.3 ;
$ Setup plotting parameters
$ feature, layer, color, style, thickness
15.1 L1 LINE1 1 1 1;
15.1 L2 LINE2 2 1 1;
$ turn plot on
91;
$ activate the feature
15 L1;
$ Plot longitudinal lines.
7 1 1000 111 110.1 112 ;
7 1 1004 1 2 3 1005 ;
$ Reset to new feature
15 L2;
$ Draw transverse lines.
6 1
1 1001
2 1002
3 1003 ;