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iPOGO V5 Help Manual On-Line |
Group: |
31) Station Os Curve |
Methodology | |
| Command: | 31 |
| Alpha Alias: | List AlignCurve |
| Description: | Prints increasing centerline stations and offset distances to three decimal places along a series of curves and tangents |
| Data Format: | 31 Radius-Point PC Station PT Point# {[Point#]..} ; { 300 Radius-Point PC PT {[Point#]..} ; } |
| Problem: | Given a computed centerline alignment. Compute stations and offsets to points along the alignment. |
| Solution: | $ initial alignment up to the first curve
31 0 7 1000 11 139 -142 ;
$ continuation of alignment stationing
$ through curve
300 10 11 12 153 -167 ; |
Data Description
| Command | 31 | Used if the centerline is composed of a series of tangents and curves. Computes centerline stations for known points lying on or off the centerline. Computes offset distances perpendicular to a centerline tangent or radial to a centerline curve. Produces output which consists of a series of increasing stations and offset distances tabulated by station number.
To ensure that station values are computed properly, iPOGO checks each point to ascertain whether it precedes the point of Curvature (PC) or follows the Point of Tangency (PT). If the initial section you enter using command 31 is a curve and there are points lying along the curve preceding the PC, then these points will be computed from the tangent at the PC. Except for an initial tangent section, tangent sections are entered as point numbers on an adjacent curve. Continue into the next curve and/or tangent by using the alignment continuation command 300. Note: If stations are out of numerical sequence in your output, then you should check for incorrect data or coordinates. Note: Previous versions of iPOGO used a -1 flag to repeat the 31 command for the next curve and/or tangent sequence in the alignment. This created a situation where point ranges could not be implemented in the older versions. This version of iPOGO has implemented a new alignment continuation command 300 to alleviate this problem. iPOGO now supports point ranges in the 31 and 300 commands but no longer supports the -1 flag. All old command files should be modified correctly when imported by iPOGO, but should be verified by the user for accurate conversion to the new version. In addition, prior versions of iPOGO implemented the 31 command as 31,1. The ,1 served no purpose and has been dropped from this version. |
| Radius-Point | 0 | Number of the radius point of the initial curve. If the centerline begins with a tangent, enter a zero. |
| PC | 7 | Point number of the initial point of curvature (PC) or the centerline tangent point. |
| Station | 1000 | Starting station value (in feet) of the PC or the initial point on the tangent. |
| PT | 11 | Point number of the point of tangency (PT) or the final point on the tangent. |
| Point#
{[Point#]..} | 139, -142 | Numbers of points lying either on or off the defined curve or tangent section. A maximum of 50 numbers may be entered for each curve or tangent section. If the defined section is a curve, also enter any points lying along the following tangent section, but do not enter the point number for the PC of the next curve ahead. Point ranges are acceptable as shown in this version of iPOGO. |
| End Command | ; | All commands end with a semi-colon. |
| Alignment
Continuation Command | 300 | Optional repeating feature of the 31 command. Continues station and offset calculations by carrying the existing stationing from the prior 31 or 300 command and continuing around next curve segment. |
| Radius-Point | 10 | Number of the radius point of the next curve. |
| PC | 11 | Point number of the next point of curvature (PC). |
| PT | 12 | Point number of the next point of tangency (PT). |
| Point#
{[Point#]..} | 153, -167 | Numbers of points lying either on or off the defined curve or tangent section. A maximum of 50 numbers may be entered for each curve or tangent section. If the defined section is a curve, also enter any points lying along the following tangent section, but do not enter the point number for the PC of the next curve ahead. Point ranges are acceptable as shown in this version of iPOGO. |
| End Command | ; | All commands end with a semi-colon. |
Example Command File
$ Example command file for the 31
$ (List AlignCurve) command
$ See the bottom of this file
$ set initial points for outside boundary
0 1 10000 10000 ;
1 2 1 -1 45 0 0 1000
-2 67 0 0 450
-3 42 0 0 880
-3 3 0 0 1000
-4 87 0 0 500 ;
$ set control for road alignment using 2e9 to
$ calculate half the distance
1 7 5 5 6 2e9 5 6 0 ;
1 8 4 4 1 2e9 4 1 0 ;
1 9 3 3 2 2e9 3 2 0 ;
$ set road alignment and right of way
11 50 10 7 8 9 800 0 ;
$ intersect of right-of-way lines with
$ the outside boundary
3.1 17 11 11 7 25 5 5 6 0 11 11 7 -25 ;
$ set lot line and center cul-de-sac
1 19 9 9 8 200 -9e9 50 ES ;
$ set cul-de-sac
12 21 25 50 25 50 12 20 ;
$ use the -17 command to define the rear property
$ lines along the west boundary
-17 6 1 2 9 19;
$ compute lot corners along left side of road
$ with 100' lots at a 40' brl
1.4 101 100 -40 -40
17 15 10.1 16 25 26.1 24 20.1 19;
$ use the -17 command to define the rear property
$ lines along the east boundary
-17 5 4 3;
$ compute lot corners along right side of road
$ with 100' lots at a 40' BRL
1.4 139 100 40 40
18 13 10.1 14 22 21.1 23 20.1 19;
$ Reset the rear corner definition
-17 ;
$ define the feature code parameters
$ cmd fea layer color style thickness
15.1 bdy bdy 1 1 1000;
15.1 rw rw 2 1 500;
15.1 lot lot 3 1 100;
15.1 cl cl 4 1 100;
$ turn plotting on
91 ;
$ activate the bdy feature and inverse the boundary
15 bdy;
100 Boundary ----------------------------;
-7 1 1 -6 1;
$ activate the rw feature and inverse the right-of-way
15 rw;
100 Street ROW Dedication ---------------;
7 1 17 15 10.1 16 25 26.1 24 -20.1
23 21.1 22 14 10.1 13 18 17;
$ activate the lot feature and inverse the lots
$ with repeating feature description
15 lot;
15.2 "Section 1 - Lot ";
7 100 17 6 102 101 17;
7 101 101 102 104 103 101;
7 102 103 104 106 105 103;
7 103 105 106 108 107 105;
7 104 107 108 110 109 107;
7 105 109 110 112 111 109;
7 106 111 112 114 113 111;
7 107 113 114 116 115 10.1 15 113;
7 108 115 116 118 117 10.1 115;
7 109 117 118 120 119 10.1 117;
7 110 119 120 1 122 121 10.1 119;
7 111 121 122 124 123 10.1 121;
7 112 123 124 126 125 10.1 123;
7 113 125 126 128 127 16 10.1 125;
7 114 127 128 130 129 127;
7 115 129 130 132 131 129;
7 116 131 132 134 133 131;
7 117 133 134 136 135 20.1 24 26.1 25 133;
7 118 135 136 2 9 19 20.1 135;
7 119 19 9 3 172 171 20.1 19;
7 120 171 172 170 169 22 21.1 23 20.1 171;
7 121 169 170 168 167 169;
7 122 167 168 166 165 167;
7 123 165 166 164 163 165;
7 124 163 164 162 161 10.1 14 163;
7 125 161 162 160 159 10.1 161;
7 126 159 160 4 158 157 10.1 159;
7 127 157 158 156 155 10.1 157;
7 128 155 156 154 153 10.1 155;
7 129 153 154 152 151 13 10.1 153;
7 130 151 152 150 149 151;
7 131 149 150 148 147 149;
7 132 147 148 146 145 147;
7 133 145 146 144 143 145;
7 134 143 144 142 141 143;
7 135 141 142 140 139 141;
-7 136 139 140 5 18 139;
$ deactivate the repeating feature description
15.2 "";
$ activate the cl feature and inverse the centerline
15 cl;
100 Centerline Road;
7 1 7 11 10.1 12 20;
/*
Station and offset points along the
road alignment with the 31 command
*/
31 0 7 1000 11 139 -142 ;
/*
Station and offset points along the road alignment
(continued) with the 300 command
*/
300 10 11 12 153 -167 ;