Compare Points to Alignment

Description

Show a report that compares selected points to an alignment.

Access

View / Report / Compare / Points to Alignment

Requirements

Solve module

Controls

Control	Description
Title	Type the title to display in the report.
Default	Click the button to display the default title for the report.
Use comparison project	Do one of the following: Clear the Use Comparison Project checkbox to compare selected points with the Alignment. Select the Use Comparison Project checkbox to compare the selected points with an alignment in the comparison project.
	Browse to the project that contains the alignment to compare.
Tolerances:	Select the checkboxes to display differences not within the Offset and Vertical Tolerances in red.
Offset	Type the tolerance for the two dimensional offset from the alignment.
Vertical	Type the tolerance for the vertical difference from the alignment.
Project start/end segments	Do one of the following: Select the checkbox to consider the offset to reference lines projected from the start or end vertex when determining the smallest offset. Clear the checkbox to exclude offsets to reference lines projected from the start or end vertices.
Project at external deviations	Do one of the following: Select the checkbox to consider the distance from the alignments internal vertices to the Vertex when determining the smallest offset. Clear the checkbox to exclude offsets to alignments projected from the internal vertices. Note: If the smallest offset is the distance from the lines internal vertex then both line segments sharing that vertex are projected, and offsets are reported to both of the projected lines.
	Move the selected item up in the Columns list.
	Move the selected item down in the Columns list.
OK	Show the comparison report.
Cancel	Cancel without running the command.

The following columns are available for output in the report. Select the checkbox to include the item in the report.

Column	Description
Unique Id	Unique identifier of the compared points.
Name	Name of the compared points.
Point Layer	Layer of the selected points.
Easting	Easting of the selected points.
Northing	Northing of the selected points.
Height	Height of the selected points.
Chainage	Chainage along the alignment to the location where the perpendicular 2D offset is computed. Note: Chainage equations are applied. Chainage is blank for projections at external deviations. Chainage is blank if a point is not positioned along the alignment.
Distance	Distance along the alignment to the location where the perpendicular 2D offset is computed.
Offset	Two dimensional perpendicular offset from the line.
Difference Height	Difference in height between the height of the alignment perpendicular to the selected point and the selected point.
Alignment Easting	Easting of the location on the alignment where the perpendicular offset to the point is computed.
Alignment Northing	Northing of the location on the alignment where the perpendicular offset to the point is computed.

Notes

Values are from the alignment to the selected point.
A negative offset indicates the selected point is to the left of the alignment.
A negative height difference indicates the selected point is below the alignment.
Only selected points will attempt to have the comparison with the alignment reported on.
Differences not within the specified tolerance are displayed in the report in red.
An asterisks indicates the offset is to a projected line segment .
Selected items will be shown in the defined order.
Press Shift + Ctrl then click to move the item to the top of the list.
Press Shift + Ctrl then click to move the item to the bottom of the list.
Only straight segments can be projected at external deviations.
The average height difference in the reports statistics is the arithmetic mean of the signed values not the absolute values.

Diagrams

Project start/end segments
		Alignment Projected Line Projected Offset Offset Vertex
Project at external deviation
		Alignment Projected Line Projected Offset Radial Distance Offset Vertex