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limiting grid extents

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    Drew Dudley

    Hi Travis,

    Thank you for posting your question. You can save the point data from the DXF directly from Voxler 4 by:

    1. Selecting the DXF in the Network Manager.
    2. Right-click on the module and choose the Save Data command from the context menu.
    3. In the Export dialog, name the file, change the Save as type to CSV or DAT, and click Save

    You should be able to grid this data in Surfer to create the input GRD for the Math module. The data can be gridded in Surfer using the Grid | Data command. When the Grid Data dialog opens, make sure that the X, Y and Z columns are assigned correct and the other parameters are set. I would not recommend using the Blank grid outside convex hull of data option. 

    Once the GRD has been created in Surfer, you can import it into Voxler as a uniform lattice, which is a requirement for the math module to evaluate correctly. 

    Please let me know if you have any questions about this workflow.

    Thanks!

    Drew

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    Travis Murphy

    Hi Drew, thanks for your response.  I created the DEM grid with the same extents and node spacing as my 'target' grid in voxler.  When importing into voxler, if I select the 'uniform' lattice, the z values are not honoured and are set to zero.  If I bring it in as a curvilinear lattice, it is located in accurate 3D space in voxler.  I am struggling with the expression I need to filter the 'target' grid below the DEM.

    regards,

    Travis

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    Travis Murphy

    ....got it! Thanks Drew!

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