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MicroStation Alignments

Some projects do not have survey detail and do not utilize MX. For these types of projects the alignment can be created in MicroStation. There are 2 different approaches to these types of projects, create a straight alignment to represent the road and hand plot field information to represent the project or use Aerial Photography for detail and create an alignment to best fit the road.

  1. In MicroStation, Open the drawing "prjctALI.dgn".
  2. Use the NHREF macro to attach all the project reference files.
  3. Using Tools > Attach (in the Reference File dialog box) attach the prjctPXH.dgn drawing if working off Aerial photography information.
  4. Use the Task list to draw the type of alignment you need. The Mainline alignment task issues the Smartline command. This can be used to draw tangents and the ~ key on the keyboard allows you to switch between drawing curves and tangents. This allows you to draw a continuous complex chain which can be stationed along its whole length. Care (and AccuDraw) should be used to make sure the arcs are tangent to the lines.
    create complex chain dialog box
  5. Alignment station cell selector

    Alignment Station Cell Selector

    Use the Mainline sta & tick Task next. This Task opens a cell selector (shown at right) which has cells for alignments with a single digit stationing up to 4 digit stations. The task also turns on the display of Data fields, opens Cell Tools, and sets all the element attributes for placing station elements.
  6. Cell Tools toolbox

    Cell Tools Toolbox

    Select the appropriate station cell for this alignment. Then select the Place Cell Along tool from the Cell Tools tool box, set spacing to 50, and hit on the very beginning of the alignment and accept it. This will place a station tick and data field every 50 feet along the alignment.
    place cell along tool dialog box
  7. The next step is to add the station values. Hit on the tool Fill in Single Enter_Data Field on the Text Tool box. Identify the first station cell's data field to select it. Type in the value of the first station on the alignment and then left click to accept it.
  8. To station the rest of the cells, use the Copy/Increment Enter_Data Field tool. Set the Tag Increment to 1, hit on the first station value to define the starting field to copy and then select every other cell's Data Field to be filled in. Remember that the cells are every 50 feet while stationing is only applied every 100 feet. Continue clicking until all a station values are complete.
  9. Tag Data can be added to the alignment so the Station-Offset macro can be used on it. See the Station-Offset documentation for more details.

New Hampshire Department of Transportation
PO Box 483  |  7 Hazen Drive  |  
Concord, NH  |  03302-0483
Tel: 603.271.3734  |  Fax: 603.271.3914