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Method 1 - Importing ASCII points into Line data file (QGFVOM)  "Riverlines Model"

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    • 1. Press the File icon

    • 2. Select New

    • 3. Press Line File

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  1. Open an existing file or enter a name for a new file in which to store the points

    Save as a QPS Graphics File (*.qgf)in the LineData folder of the active project.

  2. The new line file is listed in the Project Explorer window under the Line and CAD/GIS Files.
    A SURVEYLINES layer is automatically created. This name may be changed and additional layers can be generated.
    When the *.qgfis selected in the Project Explorer tree, the Line Tools become active:


  3. Select the Layer on which to store the lines and points or create a new layer first, using the Edit button


  4. Press 'Create Object', left-clicking in the Plan View and right-clicking to finish the line and to open the Add New Object window - Enter a name


  5. Use 'Edit Objects' to check on the created points, adding heights as necessary - lines are not used in the model, points are


  6. Press 'DTM Link' and select the Output Layer
    If needed the link settings can be changed, the defaults are 160 degrees and 1000 meters

    Press 'OK'

  7. This will start the creation of triangles between the points. The triangle links / legs between the points will now be visible


    Press 'Undo' if links are not to your satisfaction and press 'DTM Link' again to enter different settings


  8. Press 'Export' and select 'Vertical Offset Model'


  9. Select which layer to export, set the accuracy and enter a file name, here: ETRS-UTM-VORF.qgf


  10. Under the tab Project press 'Open Containing Folder' to check that your DTM model is in the right location:

    Project - LineData folder contains the lines and points as created in the Processing Manager.
    Project - Geoid contains the exported DTM model.

    It needs to be stored in the Geoid folder of the project or support project you are using to be available as a Vertical Offset Model in Database Setup:


  11. Vertical Offset Model is like a 3D Design model and can be imported into a Sounding Grid (ENH) to check if the model does not contain strange features.
    From there it can be exported as a geoid model separation grid, which creates an XML file and a BIN file, stored in the Public Shared files. This makes it available for other projects as well.
    See paragraph 'Using a grid' above.

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Info
titleSurveypoints, Geoidpoints

The Vertical Offset Model is like a 3D model which can be checked by drawing Quick Profiles on the 2D plan view.

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How to apply the newly created model in Database Setup
How to apply the newly created model in Database Setup

How to apply the newly created model in Database Setup

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