Creating Multiple Points on a Line or Grade (COGO)

This routine lets you create multiple points on a line or grade by specifying either the number of point you want, the spacing you want or a combination of both. The line can be any tangent, curve or spiral defined in a traverse.

Multiple Points on a Line

TPC will insert the number of points into the Traverse View, adding a unique number to the point label of the occupied point. This creates a unique label for each point on the line. If the traverse is tagged in the current drawing it will draw the created points.

Holding Data for the Computation

The Horizontal, Vertical and Points fields each has a button for the field name. When a value is entered for that field, the button changes color, indicating it being held for the computations. Fields that are not held are recomputed automatically as other data is entered.

To toggle one of these hold buttons on or off, just left click the button. They are automatically toggled to hold when you enter data in their fields.

Creating a specific number of points

When you enter the horizontal or vertical spacing, the program computes the number of points that can be inserted at that spacing. You can override this and enter a specific number of points to insert at that spacing.

Creating a single point

To create a single point, enter 1 for number of Points and enter the distance you want for First distance. You may also need to release the Horizontal or Vertical button. This is a great way to insert a point on a spiral or curve.

Multiple Points on a Grade

TPC creates a point at each multiple of the vertical spacing that you specify. For example, if the From point has an elevation of 379 feet and the To point has an elevation of 385 feet and you enter a Vertical Spacing of 2 feet, TPC will create points at elevation 380, 382 and 384 feet.

TPC will insert the number of points into the Traverse View, adding a unique number to the point label of the occupied point to create a unique label for each point on the line.

Creating a specific number of points

When you enter the vertical spacing, the program computes the number of points that can be inserted at that spacing. You can override this and enter a specific number of points to insert at that spacing.

Grid vs Ground / Geodetic

Multiple points are computed based on the distance type of each alignment traverse.

For example, if a traverse is formatted for ground distance at project elevation, multiple points inserted anywhere in that traverse will be ground distance at project elevation. So you can create stationing for grid, ground or geodetic.

Editions

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Related Topics

Using COGO

COGO Commands - reference