What is Dynamic Segmentation? Applications of Dynamic Segmentation: Display, Query, and Analysis of Routes, Measures, and Events (Especially for GATE-Geospatial 2022)

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Dynamic segmentation is a classic GIS tool for analysis of roads, pipelines and railroads used in transportation and utility network applications. The dynamic segmentation process generates point or linear geometry for database record event referenced by their position along a linear feature.

What is Dynamic Segmentation?

Segmentation is a key component of the object-based classification workflow. This process groups neighboring pixels together that are similar in color and have certain shape characteristics. In addition, you can use the Show Segmented Boundaries Only option if you want to display the segments as polygons with the source image visible underneath.

Classification Results Using OBIA. (A) Image-A; (B) Image-B …

Applications of Dynamic Segmentation

Dynamic Segmentation can store attributes along with routes which can then be displayed, queried, and analyzed. Useful for data management, data display, data query, and data analysis

Diagram Shows Useful for Dynamic Segmentation

Data Management

It can be useful in two ways.

  • Different routes can be built along the same linear feature
  • Different events can reference the same route, or more precisely, the same linear measurement system stored with the route.
  • Fisheries biologists can store various environmental data with a stream network for habitat studies.

Data Display

  • Once table is linked to route, table is georeferenced and can be used as a feature layer. Like geocoding an address table
Image Shows Data Display - Example
  • The thicker, solid line symbol represents those portions of the Washington State՚s highway network that have the legal speed limit of 70 miles per hour.

Data Query

It is possible to perform attribute data query and spatial data query on an event table and its associated event layer. Recent traffic accidents follow pattern

Image Shows Data Query Pattern - Example

Data query at a point, shown here by the small circle, shows the route-ID, the x-and y- coordinates, and the measure (m) value at the point location. Additionally, the beginning and ending measure values of the route are also listed.

Data Analysis

  • Routes, events may be inputs for analysis
  • Efficiency of public transit routes
  • Buffer the route, overlay with census blocks and demographic data for planning and operation of the public transit system.
  • Data analysis between two event layers
  • Relationship between traffic accidents and speed limits (like vector-based overlay operation)

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