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Geometry tools are coordinate geometry tools that utilize a heads-up interface, persists user input, and preserves blueprint intent. Results of these tools are intelligent graphic elements stored in the DGN and not in external files.

OpenRoads tools are neatly found in OpenRoads on the General Geometry and Horizontal Geometry Task menus. OpenRoads alignments are MicroStation Complex Elements.

Because OpenRoads uses MicroStation commands, the Undo command may become your favorite feature.

Geometry wise, OpenRoads offers both an Intersection Point and Element forms of construction.

General

OpenRoads points use MicroStation Snap Codes. The OpenRoads tools use cursor prompts, dynamic feedback, and on-screen manipulation to provide an interface that helps continue focus on your piece of work. Data presented on the cursor tin be changed past keying in a new value followed by an Enter to accept the new value. A Data Point (left mouse click) advances to the next prompt. Minimal prompts are also echoed to the MicroStation dialog.

When the cursor offers options instead of a numeric value, the available options tin be cycled through using the Arrow keys. The bottom right of the cursor prompt displays arrow head icons indicating which arrow keys to apply at that moment. The higher up cursor prompt graphic indicates that the Down Arrow will wheel thru the Placement Method options for that tool.

In addition, whatsoever of the tool's criteria can be locked in the dialog panel at whatever time. Locking some values may limit or otherwise affect the other values.

Relationships betwixt elements are preserved when things change. Elements can be edited past way of on-screen graphic Manipulators or adjusting the chemical element's backdrop. Accelerate to the Manipulators section to learn most editing an element.

Blueprint Standards can be created and used for control of alignment. For more sophisticated constructions, utilise Civil AccuDraw. It can exist found on the MicroStation menu, select Tools > Civil AccuDraw > Activate Toolbar.

In that location are also options to set the feature type. However if the element (or alignment) is to be converted to an MX alignment, and then the feature assignment is lost.

Import MX Geometry (SS4)

There are two different methods for importing alignments from MX depending on whether the project drawings are based on U.s.a. Survey feet or the older International foot seed files.

For US Survey Foot projects, continue with OpenRoads Horizontal Geometry - USSF

For projects with design file working units in Anxiety, continue with OpenRoads Horizontal Geometry - INTF

If you are uncertain which pick to choose, check the documentation on Working Units.

Creating New Alignments (General Comments)

Always use the DGN's Default model when creating and working with Horizontal Geometry. Also be aware that changing a DGN Model non only clears any Feature assignment, just it as well clears the Blueprint Standard.

When creating whatsoever Alignment by Elements, set the Characteristic Definition to Alignment Elements. Note that when setting the Feature Definition on the Features Definition Toggle Bar for the first time, select the Feature and so toggle the Use Active Feature Definition button OFF and so ON to wake-up the Characteristic Override and then information technology is recognized by the Active Tool. When information technology is performance properly, then the Characteristic Definition of the Agile Tool will brandish Apply Active Feature. When washed placing Alignment Elements, then set the Feature Definition to Alignment before using the Complex by Elements command. This tool is used to connect the previously placed Elements.

Essentially, all other buttons on the Characteristic Definition Toggle Bar should be toggled OFF when creating Alignments. For example, if the Automatically Create 3D option is turned ON and you lot have an Active Terrain Model, then a Best-Fit Profile volition automatically be practical to your alignment. Also, if the Rule Deactivation is toggled ON, then you will not exist able to use Manipulators to modify your alignment.

A Horizontal alignment is ii dimensional until the Vertical alignment is set Active, at which fourth dimension the tertiary dimension is created. The Vertical geometry uses the Horizontal'due south Feature Definition for information technology's settings. Vertical Geometry curves should be Parabolic, verify the Vertical Curve Type when using the Vertical geometry Complex by PI tool.

Design Standards Toolbar

The Design Standard will supply values for the element creation tools (such as minimum radius and transition lengths) as well equally direct which prompts are offered for a construction tool. The Design Standard will also check for kinks in the alignment.

To open the Blueprint Standard Toolbar, select Blueprint Standards Toolbar from either the General Geometry or the Horizontal Geometry Task menu.

This toolbar allows the selection of a Design Standard and also controls it's application to an OpenRoads element. From the left pull-down, select the desired Design Standard. From the right pull-downwards, select between Stopping or Passing Sight Distance. Adjacent, click the Toggle Active Blueprint Standard button on the left of the toolbar to toggle the standard ON from the default of OFF. When ON, the button turns amber and all subsequent commands will make use of the values contained in the standard. When OFF, the selected standard is ignored.

If a Design Standard is violated, and so feedback is provided in two ways:

1. An icon appears on the element that has the trouble. Hover near (over it is too close) the icon to reveal a tool tip written report of the mistake.
2. In the Ceremonious Bulletin Center (Tools > Civil Geometry > Geometry Toggles > Ceremonious Message Eye).

Design Standards are very alignment oriented. At that place is limited value for using Blueprint Standards for non-alignment constructions. To verify a Design Standard has been practical, use the Element Information tool on the element in question.

Set Pattern Standard

The Set up Design Standard is for applying a standard to previously created civil elements. However, the Design Standard Toolbar must exist open and the Toggle Agile Blueprint Standard button must be toggled ON before applying an Element Design Standard.

From the General Geometry or the Horizontal Geometry Chore carte du jour, click on the Set Blueprint Standard button. Side by side, choose the element to which the design standard will be assigned. To verify that a Design Standard has been practical, use Chemical element Information on the chemical element in question.

Complex By PI

Complex By PI creates a linear chemical element with curves based on user input of PI (point of intersection) locations. These curves can include transitions.

This is basically the OpenRoads version of MX'south Quick Vertical alignment. As the control suggests, the resulting alignment is a Complex Element. This tool is establish on the Horizontal Geometry Task carte.

Follow the dialog and/or the cursor prompts to guide your alignment construction. Information Points identify the PI'southward. The value for the curves back radius is seeded on the cursor. To change the seed radius, enter the new value followed by an Enter. This back seed radius volition be used for all subsequent curves till it'due south inverse. A Data Point (left mouse click) advances to the next prompt. Select the Reset button to finish the placement of PI'south.

Advance to the Manipulators section to learn about editing an alignment.

OpenRoads Elements - Fixed Elements

Line Betwixt Points creates a line between two user divers points.

Arc Between Points creates an arc. There are six Workflows for creating an arc:

• Starting time Bespeak, Radius, and Sweep Bending (or length)
• Center Indicate, Radius, and Sweep Angle (or length)
• Start Indicate, End Point, and Laissez passer-Thru Point
• Start Signal, Laissez passer-Thru Bespeak, and End Point
• Beginning Direction, End Betoken
• Kickoff Bespeak, Stop Direction

Use the Down Arrow key to cycle through the Workflows. Follow the dialog and/or the cursor prompts to guide your element structure.

OpenRoads Elements - Complimentary Elements

Line Between Arcs constructs a line between two previously placed arcs. This tool has the ability to use both a back and/or a forward Transition (spiral) between the arcs and the constructed line. This tool too has the power to apply both a back and/or a forwards Offset. Follow the dialog and/or the cursor prompts to guide your element construction.

There are four possible solutions and each solution is assigned a number. After the second arc is identified, the 4 possible solutions are displayed with their solution numbers. The position of the cursor directs which solution is taken. If your not paying attention, and then you might take the wrong solution.

The concluding prompt offers four Truncation Methods, choose from the following:

1. None
2. Back
3. Ahead
4. Both (recommended for most situations)

Use the Downward Arrow key to cycle through the Truncation options.

Simple Arc constructs an arc between two previously placed elements. Similar to Line Between Arcs, there are 4 possible solutions and the position of the cursor directs which solution is taken. If your non paying attending, and so you might accept the wrong solution. At that place are also four Truncation methods.

Spiral Arc Spiral also constructs an arc between two previously placed elements. However this tool has the power to optionally apply both a back and or frontwards transition between the elements and the constructed arc. Follow the dialog and/or the cursor prompts to guide your element construction.

Note that OpenRoads alignments are easy to adapt after associates. Refer to the Manipulators department to learn almost editing an alignment.

OpenRoads Elements - Float Elements

Like to MX, these tools for Floating Elements are designed for constructing an element with respect to one other chemical element. In addition in that location is an Offset option and a Skew selection, both are features MX does not offer and are useful for the creation of intersections and ramps. There are ii workflows for bladder lines and ii workflows for float arcs.

To Elements

Unproblematic Line To Element and Elementary Arc To Element constructs a line/arc to a base of operations chemical element. Both of these commands require an End Signal that the new chemical element will laissez passer thru. Next, place the connecting chemical element. If using the Arc To Element control, in society to change the arc's projection, toggle the Hand option betwixt Clockwise and Counter Clockwise. Follow the dialog and/or the cursor prompts to complete the element construction.

From Elements

Uncomplicated Line To Element and Simple Arc To Element constructs an line/arc from a base of operations element, COGO manner. Both of these commands require the signal of tangency and the new element is projected from there. So follow the dialog and/or the cursor prompts to complete your element structure.

Notation that OpenRoads alignments are easy to adjust after associates. Refer to the Manipulators section to acquire about editing an alignment.

Circuitous past Elements

Circuitous By Elements assembles a Circuitous Element of previously placed elements (lines and arcs). Y'all are not limited to using OpenRoads elements to utilize this tool, any existing graphics may be selected. Therefore, be careful of your proximity to other elements when building a Complex by Elements.

Using the Automatic method, hover over the first element until the directional arrow points to the desired direction. Left Mouse click to accept the chosen element. At this point, the complex path volition be highlighted. Left Mouse click again to take the complex creation or Right Mouse click to Cancel.

Alternatively, using the Manual method, select each chemical element individually using the Left Mouse click. Be sure the directional arrow is pointed in the proper direction before option. One time all items are selected, Left Mouse click away from whatever MicroStation elements to accept the Complex Element creation.

Advance to the Manipulators department to learn about editing an alignment.

Manipulators

OpenRoads alignments are editable by selecting them with the MicroStation Element Selection tool. The selected alignment highlights and boosted graphics appear showing the alignment Manipulators. These manipulators enable adjustments to be made to the alignment. Tool tips always ostend which manipulator you are at. Relationships betwixt elements are preserved whenever possible, this includes intersections.

The Text Manipulators display Lengths, Bearings and Radii which can be selected and lets you type in new values.

The Dots represent drag handles that allows one to move the points without constraint.

The Triangle or Pointer shaped drag handle redefines the point with one or more directions constrained. The arrows that are parallel to the base line are constrained to change the distance only. The arrows that are perpendicular to the base of operations line are constrained to alter that management merely. This insures that aspects of the alignment's geometry are held.

A MicroStation Snap icon displays if a indicate was created by a snap. Hovering near the bespeak will display the normal manipulator. Click and motion the dot to remove the snap constraint and replace it with new constraints.

The Ceremonious AccuDraw drag handles display when a point was created with a Ceremonious AccuDraw constraint. Text manipulators display the Civil AccuDraw constraints which were input. Hovering near the point will change it to a normal manipulator. Click and motion the dot to suspension the Civil AccuDraw constraint and supervene upon it with new constraints.

As you lot zoom in and around the design, the position of the manipulators may change. The software volition endeavor to display every bit many manipulators as are valid for the part of the particular displayed. This includes automatically moving a manipulator if necessary.

Annotation that Manipulators may be toggled ON or OFF from the Element Option console with the Disable Handles button.

Offset Transition

Beginning Transition constructs linear elements based on diverse methods of offsets from a base element. The base element may be a line, arc, spiral, or a complex chemical element. There are iv methods:

1. Single Offset Entire Element – The offset element maintains a abiding kickoff along the entire length of the base chemical element.
2. Single Starting time Partial – Same every bit to a higher place but with additional command for Start and End distance.
3. Variable Offset Taper – The offset is variable and defined by station and start at each end of the base element.
4. Ratio Divers Taper – The offset element is defined past a station offset at the beginning, and and then the end point is divers by a ratio.

MX Transfer and Stationing

OpenRoads alignments may be transferred to MX using the General Geometry task Export to Native. Go to the Transferring an OpenRoads Alignment documentation for that process.

Note that Spirals practise non transfer from MicroStation to MX.

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Source: https://www.nh.gov/dot/cadd/openroads/civil-geometry-alignments.htm

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