Summary

The GT_CHAINAGE command is used to annotate chainage distances along a traverse, which must be drawn as a 2D or 3D polyline. This tool enables precise labeling of chainages at defined intervals, vertices, or selected points along the route.

GeoTool -> Geological/Mining Tools -> General -> Annotate chainages along a route

Key Features Include:

• Annotation Options:
  • Source: Annotates chainages at each vertex of the polyline.
  • Interpolate: Annotates at a fixed regular distance along the polyline.
  • Source & Interpolate: Combines both methods for greater flexibility.
  • Picked Points: Manually select points for annotation (always uses slope measurements).
  • Selected Points or Intersections: Annotates based on specific selections.
• Chainage Formatting & Route Naming:
  • Users can choose to annotate using chainage values or route names.
  • Supports multiple chainage formats (e.g., 0+00, 0+000, 0+0000).
• Customization Options:
  • Adjust annotation interval, tick mark size, and gap length between text and tick marks.
  • Option to use route name as a layer prefix for better layer organization.
  • Option to use incrementing counts on route names.
  • Choice of left or right alignment for annotation text.
• Block-Based Annotation:
  • Allows placing custom blocks instead of tick marks for chainage labeling.
  • Scale factor adjustment available for tick mark blocks.
• Chainage Description Import:
  • Supports importing chainage descriptions from a comma-separated file (CSV/TXT).
  • Useful for adding site-specific annotations such as intersections, landmarks, or elevation points.
• File Export & Configuration Management:
  • Chainage data can be saved as CSV files for use in Excel or GIS applications.
  • Command settings can be saved and restored for future use, improving workflow efficiency.

Benefits:

This tool is ideal for roadway alignment planning, surveying applications, and linear infrastructure projects, ensuring clear and precise annotation of distances along a designed route.