Skip to end of metadata
Go to start of metadata

You are viewing an old version of this page. View the current version.

Compare with Current View Page History

« Previous Version 17 Next »

This Howto is applicable to QINSy versions 8.17 and up. The Howto for previous versions can be found here:

Howto Create a Vertical Offset Model (v8.16)

Howto Create a Riverlines model (v8.15 and older)

This Howto describes how you can create a Vertical Offset Model using the Processing Manager and how to select it for online use. We leave it with the user to decide to use a "riverlines model " qgfvom or a geoid file *.bin. 

Both methods are explained in this document.

This How To document is  a replacement of the document describing Howto Create a River Lines Model.

There are various locations where the Geoid files which are created with the Processing Manager are stored.
Use the table below to find out which files are stored where:

Installation LocationGeoid typeSource
C:\Program Files (x86)\QPS\QINSy\Geoid

No files will be installed by QINSy anymore,

Could contain previously installed or created files

QPS installers
C:\Program Files (x86)\Common Files\QPS\Geo\GeoidAll Geoid files installed by QINSy using the separate Geoid_2.0 installerQPS installers
C:\Users\Public\Documents\QPS\Shared\Geo\GeoidGeoid BIN files (Lat/Long and E/N), created from a Sounding Grid exported as GeoidProcessing Manager - User Export
Project folder\Geoid

Vertical Offset Models (VOM) in qgfvom format

Previously: River Line and VORF models in PRO format

Processing Manager - User Export
Common Files Folder\Geoid

Vertical Offset Models (VOM) in qgfvom format

Previously: River Line and VORF models in PRO format

Processing Manager - User Export

e


Use Line Planning Tool  to create a new geoid model either by importing an existing points file or by starting from scratch.
You can use the created DTM model as a separation model, but you can also create a grid from this DTM and use this as your separation model.

4 methods will be explained below.

Options to follow:

How to use the offset model in db setup

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

  1. In Project Explorer tree - Line and CAD/ GIS: right mouse button
  2. Click NEW
  3. New vertical offset model


  4. Create a new file in which to store the model


  5. Save as a qgfvom in the Geoid Folder folder of the active project or in the Common Folder Support project

  6. The new qgfvom file is listed in the Project Explorer window under the Line and CAD/GIS Files.
    A GEOIDPOINTS layer is automatically created. 



  7. Select the Vertical Offset Model file in the Project Explorer tree, then right mouse click and Press 'Import' - Select the file type you wish to import, most likely import is an ASCII points file, which we are working with in this example. But other import files are supported as well.

    In case of VORF select: ASCII Text files

  8. Browse for the file to import, using the 'Add' button and choose or create the file format to import.
    Select the Layout of the points to be imported and disable to create layers. ASCII points need to be imported on GEOIDPOINTS layer. Please note the import file format of this example is long, lat,  height. Use the test option in step 9 to verify the ASCII file parser is able to decode the import file.


  9. Press to select the layout and set up the ASCII file parser if needed


    Press OK and press 'Finish' to start importing the points

  10. The points are made visible in the Plan View. If they don't display right away, then right mouse click on GEOIDPOINTS layer and zoom to fit.


  11. Use Edit Objects - Points to check on the imported points

     
  12. Press 'DTM Link' and select the Output Layer.
    If needed the link settings can be changed, the defaults are 160 degrees and 100 meters.

    Press 'OK'.

  13. 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

  14. Make sure to save the qgfvom file.
  15. Last step is to ensure the model is stored on the "GEOIDPOINTS" layer. If not, then make an export to Vertical Offset model, by right mouse clicking the qgfvom and selecting export to vertical offset model;  this exports the points and dtm links to the correct layer.
  16. Ensure the model is stored in the Geoid folder of the project or support project. In db setup ensure the Vertical Offset Model is selected as Riverlines Model, in the input and output datum parameters of the Geodetic Wizard.


    Surveypoints, Geoidpoints

    The Vertical Offset Model is like a 3D Design model and can be imported into a Sounding Grid to check if the model does not contain strange features. Best method to do this is currently under investigation.
    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' below.

Method 2 - Importing a file into a Sounding Grid

  1. File  - New Sounding Grid


  2. Create a Sounding Grid, units geographical seconds, and select an appropriate bin size for the grid


  3. In project explorer tree, select the newly created sounding grid, then right mouse click, import ASCII points

  4. In the import GUI, Select the ASCII points file to import and click on ... next to File Format, this brings up the Layout Editor.
  5. In Layout Editor, make the to correctly import the ASCII file, use the tester to see i the data string is decoded, click ok and click fill to import the points.



  6. You can QC the sounding grid by changing the color settings.

  7. Press 'Export' - Export the separation grid to Geoid Model to be able to use it in Database setup - selecting as Output File: Geoid.


  8. Pressing 'Export' creates an *.xml and a *.bin file.
    Saving these files in the Public folder will make them available for other projects as well. They need to be stored in the Geoid folder to be available as a Vertical Offset Model in Database Setup.
  9. You can now select the separation geoid (grid) in db setup


Method 3 - From scratch

    • 1. Press the File icon

    • 2. Select New

    • 3. Press Line File



  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 *.qgf is 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.


Surveypoints, Geoidpoints

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

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 qgfvom

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

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 Vertical Offset Model is used as a Vertical Datum, the heights will be applied after projection.

  • No labels