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15.2 Defining the Vertical Curve of Roadway
The speciality of the roadway slope should be described by the vertial curve, there are three
attributes on the vertical curve—mileage, altitude and length, the mileage is representative
of the point where the slope is changed, the altitude is the altitude of the point where the
slope is changed ,the length indicate how much curve length is disigned to implement the
slope changing. the figure is shown as follow.
Mileage
0
508,306
1000,48
Altitude 324,325
329,247
325,689
Length
0
84,56
52,806
The input method of defining vertical curve is just same as the horizontal I.P., see
【
Procedure of defining Horizontal point of intersection
】
15.3 Roadway setout
When you select road-setout function ,a menu named “road setout” is poped up. before
setout, you should do something:
1. Load a LINE-TYPE file from file to memory using menu item 1.if you have
defined a roadway just now then you cannot do it;
2. The coordinates of instrument station must be setup, you can use menu item 2