Objects from Dynamic Segmentation: Basic Concepts of Route, Measure Value and Event for GIS Applications (Especially for GATE-Geospatial 2022)

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Diagram Shows Basic Concepts of Dynamic Segmentation

1. Route

Route is a linear feature such as the road, street, river, pipe, etc. that is characterized of ID and measure system, and it has a position ID and a measure value.

2. Measure Value (M)

Measure Value is a coordinate system that is independent of the other feature classes. The unit between the Measure value and other features isn՚t necessary to be the same.

Figure Shows a Route and Its Node Information

3. Route ID Field

Fields in the route dataset that store the route ID. The Route dataset, the event table and spatial data contain this field.

4. Route Dataset

Store the location of events, which is a route dataset a vector dataset.

5. Route Position

Route position describes a “point” in the route or a “section” along the route. A point in the route position is described by a Measure value, and a line in the route position is described by two Measure values:

Diagram Shows Types of Two Measure Values

6. Event

When the route positions and their associated attributes store in one table, a route event will be organized, which is called event for short. There are two kinds of route positions, so they are corresponding to two types of route event table: point event table and line event table.

Figure Shows Point Event Table and Line Event Table

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