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How-to Create a Riverlines Model (v8.15 and older)

This How-to describes how you can create a River Lines model file (*.pro file) without using the Geoid Model Utility.

As of QINSy version 8.15.1 please use the newer How-to's named

On this page:


Line Data Manager

  1. Open the Line Database Manager in the QINSy Console
    1. Create a New file 
    2. Select Import


  2. Select the ASCII file you wish to import
    1. In case of VORF select: ASCII (Lat/Long) File


  3. Browse to the location where you have stored the file you want to import


  4. Select the Template database you created which complies with the Datum that your Geoid file refers to 


  5. Select a preview of the file
    1. Select the separation character 
    2. Select the number of columns you wish to import

  6. Select for each column the Category and the Property


  7. Store the Points on the layer GEOIDPOINTS (save the layer when requested)

    Finish the import wizard.

  8. Select Layer Settings


  9. Tick the option DTM Link for the Layer GEOIDPOINTS.
    This will enable the creation of triangles between the points. The triangle links / legs between the the points will not be visible in the LDM, but will be visible in the Processing Manager (since QINSy CD release 8.10.2013.05.07.1).

  10. If needed the link settings can be changed, the defaults are 160 degrees and 1000 meters


  11. Save the River Line Model you just created

    1. It needs to be stored in the GEOID folder of the project or support project you are using to be available as a River Line Model in Database Setup

Terramodel

  1. The geoid separation points should be stored on the layer 'GEOIDPOINTS' in the line database (*.pro file).

  2. Check the link settings used

  3. Draw a quick profile to create triangles

  4. The RLM.pro file should be stored in the 'Geoid' folder of the active project, or the support project when used (and copied to other projects).

Processing Manager

  1. Open the Processing Manager and Import the file you just saved as a CAD file


  2. River Line 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.

Database Setup

When editing the Mean Water Level Model and/or the Vertical Datum / Chart Datum on the Geodetic Parameters pages,
select

  1. The 'Geoid Height - River Lines' option
    • if the geoid separation points are absolute heights on the selected survey datum.
      Browse for the line database.

  2. The 'Height Level - River Lines' option
    • if the geoid separation points are relative heights with respect to another geoid model.
      Browse for the line database.

Surveypoints, Geoidpoints

QINSy versions prior to 8.10.2013.04.01.1:

  1. Require that there is at least one line (route) defined on the layer 'SURVEYPOINTS'.
  2. The 'GEOIDPOINTS' layer is always re-linked when used online or in a Replay session.
    The link distance is fixed at 1000 meters.

In later versions:

  1. The 'SURVEYPOINTS' layer may be empty, and the 'GEOIDPOINTS' layer is not re-linked if already linked.

RLM Heights are applied after Projection

Please note that when a River Line Model (RLM) is used as a Vertical Datum, the heights will be applied after projection.