Linework Parameters

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Linework Parameters

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Introduction

Users can add 'Code Parameters' to the point description to edit how Strings are drawn between the COGO Points.

By default, String linework is created between Points as straight lines, using the Point 'Code' and Survey String 'number' (eg: CL1, with CL being the 'code' and 1 being the 'Survey String number').

Adding text at the end of the Code (and optionally String number) of the point (separated by a user defined delimeter) can change straight line connections between points. This is useful for many purposes:

Creating a 3 point arcs, followed by tangential arcs for subsequent points, to describe curved features in the survey.  Arcs will be repeated until a Civil Point sets the parameter to Line, or to the end of the Survey String.

Creating a 2 point arc by using the incoming line direction, first point position and second point position.  Arcs will continue to be created by keeping tangency to the incoming arc until a Civil Point set the parameter to Line, or to the end of the Survey String.
     Note: This parameter should not be applied to the first point in a Survey String, because in that instance no starting direction is defined and unexpected results are likely.

Restoring to Lines between points, starting at the end of arc linework.

Creating a rectangle using 3 points only, to save time in survey pickup

Closing Survey Stringwork back to the start of itself, for closed features such as building outlines, kerb islands, planting areas, etc

Exclude a point from being used in the creation of the linework, as well as remove the point from the surface

Appending a Template to the Survey String to describe standard section shapes such as kerb.  Assigned Templates apply for the full extents of the Survey String

The suffix text is customisable.  The user picks the 'delimiter' to apply, as well as the character/s to trigger a change in the linework generation.

If the delimeter (symbol) was a full stop, and the letter F identified the linework to start arcs, then a point picking up a road centreline might have a description like below:

CL1.F

The CL portion would be considerd the CODE portion of the description (detailing what the point represents

The 1 would be the Survey String (String) number (the Survey Strings routine finds unique Codes with Survey String numbers, and joins each code with the same string number.

The .F portion would be the linework parameter, directing the software to apply 3 point arcs from this point onwards.

Details

Upon selecting the command the following form is displayed:

Symbol
This is the delimeter separating the code and Survey String number from the parameter.
Type in a character (such as a full stop)

Parameter Code
User defined characters to append at the end of the point description, to change the linework behaviour

  Arc
Linework drawn from this point will create arcs using the next two points (a 3 point arc) and continue to repeat 3 point arcs until a 'Line' parameter is applied

  Line
Linework drawn from this point will be straight lines between points. Used to stop arc linework

  Surface Exclude
When applied to a point, both the linework and the surface will exlcude the point.  Linework will be drawn as if the point didn't exist, and the point wil be removed from the surface tirangulation.

  Rectangle
Creates a rectangle from 3 points

  Box
Not yet applied.
Creates a box from 2 points.  This parameter requires a number to be included after the 'Box' parameter, to describe the width of the box linework.  Positive values will draw a box by offsetting left of the Survey String.  Negative values will offset to the right.

  Close String
Ensures that a line is drawn from the last point in the connected linework, back to the start of the linework.

  Don't String
Not yet applied.
Stops Survey String creation for the Survey String that would otherwise connect the selected Civil Points.

Template Assignment
Users can establish unique parameters and have Templates attached to the Survey String, to create offset Survey Strings describing standard shapes.

   [Template Assignment List]

     Parameter
Type in a Parameter to apply after the Parameter Symbol

     Type
Select a Template to apply to the String when the Code (parameter) is included in the Point Description

   Add Code
Add a new Parameter (Code) in the Template Assignment List

   Delete Code(s)
Delete selected (highlighted) lines in the Template Assignment List.

Apply
Apply these settings and close.
Note: Click on the X at the top right of the window to close without applying any changes.


Symbol	This is the delimeter separating the code and Survey String number from the parameter. Type in a character (such as a full stop)
Parameter Code	User defined characters to append at the end of the point description, to change the linework behaviour
Arc	Linework drawn from this point will create arcs using the next two points (a 3 point arc) and continue to repeat 3 point arcs until a 'Line' parameter is applied
Line	Linework drawn from this point will be straight lines between points. Used to stop arc linework
Surface Exclude	When applied to a point, both the linework and the surface will exlcude the point. Linework will be drawn as if the point didn't exist, and the point wil be removed from the surface tirangulation.
Rectangle	Creates a rectangle from 3 points
Box	Not yet applied. Creates a box from 2 points. This parameter requires a number to be included after the 'Box' parameter, to describe the width of the box linework. Positive values will draw a box by offsetting left of the Survey String. Negative values will offset to the right.
Close String	Ensures that a line is drawn from the last point in the connected linework, back to the start of the linework.
Don't String	Not yet applied. Stops Survey String creation for the Survey String that would otherwise connect the selected Civil Points.
Template Assignment	Users can establish unique parameters and have Templates attached to the Survey String, to create offset Survey Strings describing standard shapes.
[Template Assignment List]
Parameter	Type in a Parameter to apply after the Parameter Symbol
Type	Select a Template to apply to the String when the Code (parameter) is included in the Point Description
Add Code	Add a new Parameter (Code) in the Template Assignment List
Delete Code(s)	Delete selected (highlighted) lines in the Template Assignment List.
Apply	Apply these settings and close. Note: Click on the X at the top right of the window to close without applying any changes.