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Method 1 - Importing ASCII points into Line data file (QGFVOM) "Riverlines Model"
1. Press the File icon
2. Select New
3. Press Line File
- 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.
- 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:
- Select the Layer on which to store the lines and points or create a new layer first, using the Edit button
- 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
- Use 'Edit Objects' to check on the created points, adding heights as necessary - lines are not used in the model, points are
- Press 'DTM Link' and select the Output Layer
If needed the link settings can be changed, the defaults are 160 degrees and 1000 meters
- 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
- Press 'Export' and select 'Vertical Offset Model'
- Select which layer to export, set the accuracy and enter a file name, here: ETRS-UTM-VORF.qgf
- 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:
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.
The Vertical Offset Model is like a 3D model which can be checked by drawing Quick Profiles on the 2D plan view.
How to apply the newly created model in Database Setup