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GEOPAK Corridor Modeler Questions

Josh M
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I am a long-time GEOPAK user, and  I am looking into the new Corridor Modeler approach of roadway design.  I have attended a few Distance Learning classes and I believe I understand the basic workflow, but I have run into several snags.  Can anyone address these from a GEOPAK perspective?

  • I sucessfuly imported our ddb file into a xin in order to define styles.  I found our ddb file's naming convention is a litte complicated, so I then found a sample xin somewhere that I would like to borrow heavily from.  How can I edit a xin file from within GEOPAK?  Is this possible, or do I need to edit a ddb and then re-import it into an xin every time?
  • I have created a a template for a rural section.  I would like the ability to have a ditch bottom point follow a special ditch profile and follow a particular graphic element for its alignment rather than be at a fixed offset and elevation relative to the centerline.  How do I assign a special ditch profile(s), and how do I search for plan view graphics to define variable offsets?

I know exactly what I need to do in GEOPAK to complete my designs, but I can see the advantage of using a model-based approach offered by Corridor Modeler.

I have trouble justifying spending a lot of money on training on something that I am not even sure we would ever use for production work.

Thanks for any help,

Josh Mauritz

MS v08.11.05.17

GPK v08.11.05.39

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    Thanks again, guys.

    Here is where I am at now.  So far I have successfully:

    Imported a ddb file, existing surface, gpk chains/profiles.
    Created a template that is pretty close to what I typically use.  It needs a bit of work.
    Processed this template along an alignment and profile in even 5-ft increments.
    Drawn Cross-sections using previoiusly drawn GEOPAK pattern lines.

    I am now tring to run GEOPAK Earthwork, and I am finding that CM's end conditions don't tie to exisitng ground very well (not as well as GEOPAK).  I have increased my EW tolerance to 0.5, and EW still does not work on several sections.  How do I get CM to draw more accurately? (SEE XS_1081.609.DGN)

    Also, GEOPAK allowed the top and bottom of pavement/base layers, C&G, etc. to be drawn with different symbologies.  This allowed EW to accurately calculate EW.  For instance, CM is calcuating the end area of ROADWAY_BASE as if it includes the shoulder and pavement. (SEE XS_1000.DGN and xslog.txt)

    Also, the ewlog.txt does not show any end areas and volumes for shoulder and pavement.  I don't necesarily need a pavement volume, but I do need a volume for aggregate shoulder.  I thought if I calculated these they might not be included in the base area/volume calcs.

    I'm sure I'll have more questions as I work through learning CM, but this is it for now.

    Thank you,

    Josh
     

    xs_1000.dgn
  • in reply to Josh M

    If the EC's are not hitting ground correctly make sure the existing ground surface that is plotted on the sections is from the .dtm file and not the .tin.  There may be slight differences between the existing ground Geopak .tin and the .dtm file that gets created from the Corridor Modeling application. 

    When you develop your templates you need to pay attention to how the components are created.  Components can be created as Open or Closed.  If you are using Geopak EW to calculate pavement quantities you would most likely want to use Open components and create your template like Criteria would draw it.

    Scott 

     

Reply
  • in reply to Josh M

    If the EC's are not hitting ground correctly make sure the existing ground surface that is plotted on the sections is from the .dtm file and not the .tin.  There may be slight differences between the existing ground Geopak .tin and the .dtm file that gets created from the Corridor Modeling application. 

    When you develop your templates you need to pay attention to how the components are created.  Components can be created as Open or Closed.  If you are using Geopak EW to calculate pavement quantities you would most likely want to use Open components and create your template like Criteria would draw it.

    Scott 

     

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