You use the Linear Segment Details section to locate a linear segment or point on a linear asset.
The Linear Segment Details section, which is on tabs in several applications, appears only if you are working with a linear asset. For example, if you enter a linear asset in the Asset field on a PM record, the PM tab displays a Linear Segment Details section. If you enter a point asset, the PM tab does not display this section.
The Linear Segment Details section includes fields for both start and end points. If you locate a point, such as a stop sign, the start and end points are the same.
The following table describes the fields in the Linear Segment Details section. You can enter a measure directly, or you can select a Reference Point (or Reference Point and Reference Point Offset), and the measure is calculated automatically. Depending on the segment or point you are locating, the Y and Z offsets and references might not be relevant.
Reference Point |
The label of the feature instance. For example, MP 27 might be the label for an instance of the feature, Mile Post. Use labels that maintenance workers in the field can easily identify. Click Select Value to select the reference point. |
Reference Point Offset |
The distance before or after the reference point. Specify an offset value if the segment start or end is before or after the reference point. The value can be negative (before) or positive (after). For example, if the Start of the segment is 528 feet before Mile Post 27, enter -528. You cannot specify an offset that, when combined with the reference point, yields a measure that is outside the boundaries of the linear asset. For example, if reference point MP 1 is at 1.0 miles on a linear asset that begins at 0.0 miles, you cannot enter an offset of -2 miles. |
Measure |
The distance from the start of the linear asset. You can enter the value directly, or, if you enter a reference point and reference point offset, the measure is calculated automatically. In the example using Mile Post 27 and an offset of -528, the calculated measure is 26.9 miles (528 feet = .1 mile). |
Y Offset |
The perpendicular distance (right or left) from a reference point on the linear asset. For example, a guard rail is located 20 feet to the right of a road. Therefore, its Y Offset value is 20. |
Y Reference |
The point from which the Y Offset is measured. Click Select Value to select a value. The system administrator creates the set of Y Reference values by creating a domain in the Domains application. For roads, some common examples include: midline, outer pavement edge, and inner pavement edge. For example, a stop sign is located not just 20 feet from a road, but 20 feet from the midline of a road. |
Z Offset |
The distance above or below a reference point on the linear asset. For example, an exit sign is located 18 feet above a reference point on a road, therefore, its Z Offset is 18. A culvert is 4 feet below a reference point on a road, therefore its Z Offset is -4. |
Z Reference |
The point from which the Z Offset is measured. Click Select Value to select a value. The system administrator creates the set of Z Reference values by creating a domain in the Domains application. For roads, some common examples include: road surface and road bed. For example, an exit sign is located 18 feet above the road surface, or a culvert is 12 feet below the road bed. |