Getting Started

This article will help you set up a Qimera project.

For Installation information, please see How-to Install Qimera and How-to License Installation or How-to License Manager.

Getting up and running with Qimera begins with creating a Project, or opening an existing Qinsy project. Qimera projects store bathymetry data in QPD format and external source data such as SVP, vessel and tide; they also allow you to manage your data processing flow and preserve any processing steps that you have already accomplished, and provide a centralized location for storing exported products. The data used for this Quickstart is Kongsberg EM2040 single head data from Wellington, New Zealand and was part of the Shallow Survey 2012 common dataset; Download files. These files are Raw Sonar Files and when using Qimera they can be fully processed.

This Quickstart demonstrates a straightforward workflow with one of the more comprehensive data types, Kongsberg .ALL files.
Other data types will follow a similar workflow, but there may be additional steps or you may encounter other dialogue boxes that are not shown in this Quickstart.

For other data types, we have created How-to's that attempt to document differences in workflow.
The available How-tos are:

• How-to Work with Qinsy Data;

• How-to Work with Hypack HSX Data;

• How-to Work with Konsgberg ALL Data

The import and processing of raw data formats is dependent on licensing. In Qimera, go to the Help drop-down menu and choose View License Status to view your current license coverage.

On this page:

We have implemented a new option to change default left mouse button behavior based on workshop feedback with former Qloud users.  The default left mouse button will remain the same in that you need to hold down the Shift key to adjust the view in the Scene when you are in another mode such as polygon selection.  The new optional mode leaves the left mouse button always in navigation mode and you hold down shift to activate the secondary mode, such as to draw a polygon.  Many Qloud users have found this second mode more intuitive in that you can draw a selection and then it remains where you drew it when you attempt to adjust the 3D view. This setting is available in the 'General' tab of the Qimera Preferences.

Quickstart Info

You can view a full-size version of any image in this Quickstart by clicking on the image. Numbers in images are referred to in the text preceding the image or in the image caption itself. Blue text indicates a link to the manual, another document, or data.

Step 1 – Launch Qimera

Launch Qimera by clicking on the icon, or from the applications menu of your computer (using Windows: Start > All Programs > QPS > Qimera).

Step 2 – Create the Project

Qimera provides a guided Dynamic Workflow that can guide you through processing steps and will attempt to complete certain steps (such as vessel extraction, for example) for you.
Part of the Dynamic Workflow is the Welcome Screen, which will launch automatically when Qimera is opened. From the Welcome Screen, select New Project. 

Qimera Welcome Screen

The Create Project dialogue will launch. Add project name information (1). By default, the folder for your project will be in the '/Users/username/FMData/Projects' directory (2), though you can choose any location. Once created, the project folder will contain sub-folders for storing bathymetry files in QPD format, internal metadata, extracted external source data, and products. The Description box (3) can be used to add additional notes about the project. Finally, the default ("Automatic" option) is for Qimera to automatically set the project coordinate system based on the first imported line of source data (4). For unprojected/geographic source data, the closest UTM zone will be used; for projected data, the project projection will match that of the source data as set by the user on import. If you prefer, you can select the Manual radial button and manually select a different projection.

Create Project

Alternatively, you can create a project by clicking the Create Project Button

or by going to the Project menu and choosing New Project. The default project location can be changed in the Preferences (Project > Preferences, Shared Preferences tab, Default Project Folder).

Project Projection

At this time, Qimera projects must be projected.

Step 3 – Add Source Files

Qimera provides tools for full bathymetric processing of Raw Sonar Files such as Qinsy DB, Kongsberg ALL, Reson S7K, Hypack HSX, GSF Files, and Edge Tech Files JSF. Qimera can also do limited geospatial processing of Processed Point Files such as ASCII XYZ, Hypack HS2, and Danish Hydrographic FAU. A list of Supported Data Formats can be found here.

The guided workflow will next ask you if you would like to add source files to your new project. Choose Add Raw Sonar Files.

Add Source Files
Alternatively, you can add Raw Sonar Source Files by clicking the Add Raw Sonar File button or by going to the Source menu and choosing Add Raw Sonar Files.

The user will then be presented with Add Raw Sonar Files dialogue shown below. This dialogue lets you select specific files or a directory containing your files. Here, we choose Add Files (1) and add the raw sonar files. Set the coordinate system of the imported data (2). Click OK to start the add files process (3).

Qimera attempts to automatically detect and extract any available information as it adds source files to the project. Extracted information includes vessel configuration, position, heading, motion, sound velocity, and tide and/or GPS/GNSS height corrections – if it is supported by the file format and available in the file (for a full list of what is extracted from each supported format, click here). Multibeam records are indexed and retrieved as necessary from the raw files; only minimal metadata information is extracted from the multibeam ping records. Rich formats will contain much of this information, making your processing workflow faster. Other formats may be missing this information, in which case it will have to be added separately. 

As the extraction progresses, Qimera will track processing and any potential issues or errors in the Job Activity Window.

As information is extracted from the source files, it is written to the Qimera project.

 
For rich formats with soundings (XYZ footprints calculated during acquisition or online), Qimera can directly convert the online XYZ for each file during import and write them to a QPD, which is the QPS internal format for processed point data. The QPD files are then written to the project.  

For acquisition by Qinsy users, the QPDs computed while online are used directly without recomputing.  For file formats that contain complete sonar information and all supporting ancillary data, Qimera can calculate XYZ footprints for each file after import and write it to a QPD.

If water column data is available in the files, it will be indexed as well.

The source files for the project will be listed in the Project Sources Window, under the Raw Sonar Files (which is the Parent level) navigation track lines will also be visible. The check boxes next to each line control visibility in 4D Scene; lines that are checked are visible. Source file location and the QPD file that corresponds to each source file can be viewed in the File Table Window. 

File Visualization & Selection in Qimera

Checking a file on

or off 

in the tree view controls the visibility of the trackline; it does not affect which files are used in grid creation and processing routines.

For files to be used in a processing routine (such as grid creation), they can be checked on or off, but they must be selected in order to be processed 

. Files can be selected by clicking on the file name or trackline with the mouse (use SHIFT-click or CTRL-click to select multiple files), or by selecting the Parent level above the files in the Project Sources Tree View – in this example, the current Parent level would be Raw Sonar Files.

This is a key part of Qimera's workflow. For an overview of the Qimera user interface, click here.  

Note: When lines have just been added to your project and you are prompted to do a process, all of the lines that were added will automatically be included in that process.

Step 4 – Create Dynamic Grid

Additional Processing

Some file formats may need additional source information and/or source files and should have additional processing applied before creation of the Dynamic Grid. This will be indicated by a prompt (for example, a message that your vessel offsets are zero and prompting you to add information) and/or by the 

symbol next to the file name in the Project Sources Tree View; the prompt to create a Dynamic Grid described below will not appear. Qimera only requires core ping information, vessel motion and navigation to create a Dynamic Grid and does not require that you have the full complement of ancillary data such as SVP, Tide or even vessel offsets (these are assumed to be zero until specified otherwise). It should be noted that if SVP, tide or vessel offset information is missing, then any processed soundings or grids generated from these will be sub-optimal. If you know that your files require additional source information, source files, and processing, you may want to go to Step 6 - Add Vessel Information & Adjust for Motion or Step 7 - Add Additional Source Files & Perform Processing first. Note that the Dynamic Grid can easily be re-generated after any stage of processing.

Once the files have loaded, Qimera will prompt you that lines have become ready for cleaning, and ask whether you would like to add them to a Dynamic Grid. Dynamic Grids are gridded bathymetric grid models that can be viewed and edited in 2D or 3D; they are "dynamic" because they reflect the state of the processed data (the QPD files) and will update to reflect changes you make during various processing steps. Click Create New in the Dynamic Workflow prompt in 4D Scene to start building your Dynamic Grid.  Alternatively, if the Dynamic Workflow does not activate, a new Dynamic Grid can be created by selecting from the main toolbar Layer → Create Dynamic Grid.

The Create Dynamic Grid dialogue will launch. Change the name of the grid if desired (1). Qimera will calculate a suggested cell size using an approach based on the footprint size of an average multibeam echosounder projected to the mean depth of the set of files provided to the wizard (2), though you can adjust the value. If you would like to create a CUBE grid, check on Enable CUBE Grid (3) and adjust the CUBE options by clicking on Settings (4). Click OK to start the grid build. Link to what CUBE grid is?

The progress of the build can be followed in the Job Activity Dock.

Once the grid build is complete, the Dynamic Grid will be visible in the 4D Scene. If you click on the Project Layers tab, the layer will be listed in the Project Layers Dock under Dynamic Grids. Selecting that layer (by clicking on it with your mouse) will show attributes for that grid, including the depth layer being displayed, the Colour By options for the grid, the selected Colourmap, and Opacity controls. At this point, you might choose to turn off your navigation tracklines to get a better look at the grid. You can do this by returning to the Project Sources tab and unchecking Raw Sonar Files.

Create Dynamic Grid

Alternatively, you can create a Dynamic Grid by selecting the files or area of interest and clicking the Create Dynamic Grid Button 

or by going to the Layer Menu and selecting Create Dynamic Grid. When using these options, be sure to select your lines first, either individually or by clicking on the Raw Sonar Files parent in the tree view to select all available files. More information about Dynamic Grids can be found here. 

Step 5 – Explore your data

When you start working in Qimera, you will be looking down at your data in Plan View (this button is currently called 2D view)

Changing to Turntable View

When working in Turntable View, you may want to adjust your vertical exaggeration (5). This can be done in the Project Layers Dock; simply type a new value into the Vertical Exaggeration field. You may also want to turn off the Widgets; this can be accomplished by clicking the View Widgets 

Navigating in Qimera

It is strongly advised that you use a 3-button mouse to work in Qimera. It greatly improves your ability to move quickly through the data.

Qimera Interface & User Interaction

You can find more information on the Qimera user interface here. Information pertaining to user interaction can be found here.  

Step 6 – Add Vessel Information & Adjust for Motion

Patch Test

If you have not yet conducted a patch test in order to determine your motion offsets, do so now and if possible add the information in to your online systems so that motion artifacts are corrected online for any additional data you will be collecting. Offset values calculated using the Patch Test tool can be added to the project from the Patch Test dialogue using Add Calibration, Save, and Apply. You can find more information on the Qimera Patch Test tool here, and a howto on using the tool can be found here.

Static grids

You may find it useful to create a Static Grid prior to performing processing steps, to use as a way of comparing the pre- and post- processing results. You can create a Static grid using the Create Static grid 

Button. 

In some cases, the vessel offsets and motion information may not have been populated online. This information can be added in the Vessel Editor. If no vessel offsets or motion information is detected when the sources files are added, you will get a warning that the vessel offsets are zero, and Qimera will ask you if you want to edit the vessel information.

Click Yes to launch the Vessel Editor. Select the system you want to edit form the Systems tab (1). Double click on any of the boxes (2) to make the values editable, then add your offset values.

Re-process your files and recreate the Dynamic grid to incorporate the changes.

Zero Vessel Offsets

Vessel Offsets may be zero because corrections were applied in the POS MV, in which case vessel offset information won't need to be added. This will depend on your acquisition set-up.

Vessel Editor

You can also launch the Vessel Editor by right-clicking on Raw Sonar Files in your Project Sources and selecting Edit Vessel Configuration, or by going to the Tools menu and selecting Edit Vessel.

Step 7 – Add Additional Source Files & Perform Processing

Static grids

You may find it useful to create a Static Grid prior to performing processing steps, to use as a way of comparing the pre- and post- processing results. You can create a Static grid using the Create Static grid 

Button. 

In some cases, the Raw Sonar File formats do not have all of the information stored in them for full processing – for example, Sound Velocity information is stored in Kongsberg ALL files but may or may not be present in DB, HSX, or S7K files. In other cases you may want to reprocess the position and motion using a different data source.

Add & Edit Sound Velocity Profiles (SVPs)

ASCII, Hypack, and Caris SVP information can be added to Qimera by going to the Source menu and selecting Import > ASCII SVP, Import > Caris SVP, or Import > Hypack SVP.

Once the SVP information has been added to the project (either via automatic extraction or through the Source > Import menu option) it will be listed in the Project Sources Dock under Sound Velocity Profiles.

SVP information that is part of the source data will be used for processing and creation of the Dynamic grid from the beginning. Otherwise, the addition of new or additional SVP information will require manual intervention to link the newly imported SVP files to be applied to particular raw source files. This is done by editing the Sound Velocity Strategy in the Processing Settings Editor for all raw multibeam source items that require updating (accessing the Processing Settings Editor is described below). 

Once SVP information is added to the project, it can be edited using the SVP Editor. Launch the SVP Editor by going to the Tools menu item and selecting Edit SVP, or by selecting the SVP of interest from the Project Sources Window, right-clicking, and choosing Edit SVP.

When there are multiple Sound Velocity files in your project, you can choose how they are used during processing in the Processing Settings. To access the Processing Settings Editor, select the file or files that you want to apply specific settings to and click on the Processing Settings Button

Select the Sound Velocity tab to review the options for Sound Velocity strategy and prioritization. Make any necessary changes and click OK.

Once this is done, Qimera will mark all affected files as needing processing, indicated by the

Sound Velocity

For more information on the SVP Editor, click here. For a howto on adding and editing Sound Velocity, click here.  

Add & Apply Tide Information

Qimera supports a variety of tide formats directly (click here for a list of all supported tide formats); alternatively, an ASCII file with tide information can also be imported and configured. Supported tide formats and ASCII Tide can be added to Qimera by going to the Source menu and select Add Tide File.

Once the tide information has been added to the project it will be listed in the Project Sources Dock under Tide Files (1). Adding Tide information will mark all affected files as needing processing (2), indicated by the

After the new information is integrated in all of the affected files, any Dynamic grids utilizing those files will automatically update.

Applying Tides, Vertical Referencing.

For a howto on adding and applying tides, click here. For more information on setting the Vertical Referencing method, click here; a howto on Vertical Referencing can be found here. 

Add & Apply Other Navigation Sources

Other Binary Navigation sources (SBET or POSMV) can be added and used for vertical referencing and/or position/motion/heading. These files can be added to Qimera by going to the Source menu and selecting Add Binary Navigation Files.

Once the Binary Navigation information has been added to the project, it will be listed in the Project Sources Dock under Position & Motion Files. Adding Binary Navigation information will mark all affected files as needing processing, indicated by the

When there are multiple vertical referencing or position/motion/heading sources in your project, you can choose how they are used during processing in the Processing Settings. To access the Processing Settings Editor, click on the Processing Settings Button

Select the Vertical Referencing tab to review the options for Vertical Referencing Method.  Importing binary navigation for heighting will change the vertical referencing method to GNSS/GPS, and the newly imported information will be set as the top priority item in the list of vertical referencing source streams. 

Select the Position, Motion, Heading tab to review the Source Priorities for these three attributes.  Newly imported data is always promoted to be the top-priority source.

Importing Binary Navigation, Vertical Referencing Method

For more information on the navigation configuration dialogue when adding Binary Navigation Files, click here. For a howto on adding Binary Navigation Files, click here. For more information on setting the Vertical Referencing method, click here; a how-to on Vertical Referencing can be found here. 

Step 8 – Edit Bathymetry

Editing of bathymetry can be accomplished using Area-Based Manual Point Editing in the 3D Editor or Slice Editor, Swath-Based Manual Point Editing in the Swath Editor, by using Filter Operations (ex. Spline), by using CUBE Filtering, or by using a combination of these methods.

Hotkeys

The speed of exploration and processing in Qimera can be greatly increased by familiarising yourself with the hotkeys. New in Qimera 1.6.0, hotkeys are now configurable. Go to 'Configure Shortcuts' in the Project dropdown menu.

Hotkey information can be discovered by hovering your mouse over a button 

or by noting the key combinations listed after menu items

.

Widgets

When exploring your bathymetry in Turntable Mode of the main Qimera interface and when working in the 3D Editor, you may find it helpful to turn off the Widgets. In Turntable Mode, the widgets can be turned off using the View Widgets

Button. In the 3D Editor, turn of the Widgets by selecting Display from the 3D Editor Menu Bar and then selecting Show Widgets.

Area-Based Manual Point Editing: 3D Editor

Prior to doing manual editing, you may find it helpful to change your Depth Layer in the Project Layers Window to Shallow or Deep (1). This will draw your attention to all of the spikes on the top of the grid or bottom of the grid, respectively. Note that any edits you make will flag the QPD points on save, and all depth layers will update on save to reflect those changes.

To do Area-Based Manual Point Editing, use the Select Area Mode

In the 3D Editor, use Explore Mode 

3D Editor User Interface

More information on the 3D Editor User Interface can be found  here.

Area-Based Manual Point Editing and Filtering: Slice Editor

Please see the How-to Work with Slice Editor for a complete working tutorial. The filtering capability that is outline in the section below can also be applied from the Slice Editor to the data that is currently loaded and visible.

Spline Filtering

Static grids for Filter Check

You may find it useful to create a Shallow Biased Static Grid prior to filtering, to use as a way of comparing the pre- and post- filter results. You can create a Static grid using the Create Static grid

Button.  

Filtering profiles and advanced application techniques became available in Qimera 1.3. Please see the following references and Howtos for additional information:

Qimera Filter Operation Toolbar

Qimera Manage Filter Profiles dialogue

How-to Spline Filtering details

The Spline Filter attempts to fit a grid through noisy multibeam echosounder data and reject all footprints that lie too far from this grid. Spline filtering can be started via the Filter Operation Toolbar or inside the Slice Editor dock, once that has been loaded with points.

To use the Spline Filter, move to the Project Layers and select the Dynamic grid you would like to filter. Change your Depth Layer in the Project Layers Window to Shallow and preview the grid. This will draw your attention to all of the spikes on the top of the grid. Alternatively, you can set the 'colour by' setting to Standard Deviation. Note that filtering will flag the QPD points, and all depth layers will update after the filter completes to reflect those changes.

A Spline Filter can be applied to the entire selected Dynamic grid, an area selection (inside or outside) or selected lines within that grid. To limit the area filtered to a line or lines, use Simple Select 

Review the results of the filter, comparing the new Dynamic grid to a pre-filter Static grid if one was created.

Swath-Based Manual Point Editing

Prior to doing manual editing, you may find it helpful to change your Depth Layer in the Project Layers Dock to Shallow or Deep (1). This will draw your attention to all of the spikes on the top of the grid or bottom of the grid, respectively. Note that any edits you make will flag the QPD points on save, and all depth layers will update on save to reflect those changes.

To do Swath-Based Manual Point Editing, select a line for editing either by selecting on the file in the Project Sources Raw Sonar Files tree view (1) or by clicking on one of the tracklines visible in the 4D Scene (the tracklines will need to be checked on in the Project Sources Window). Then, activate the Swath Editor in the Toolbar or press the '1' key. This will load the number of pings defined by the Buffer Width

In the Swath Editor, use Erase Invalid Mode 

To move along the line, use the Previous Block 

Use the Save Edits 

Saving Changes, Swath Editor

Note that you do not have to save edits if you continue to work on the same line; the edits will be stored as you progress along the line. However if you don't save changes before moving to the next line, the software will prompt you that you have unsaved changes and will force you to save or loose edits at that point.

Swath Editing

Additional information about cleaning data with the Swath Editor can be found here.

CUBE Editing and Filtering

CUBE Editing results in a clean CUBE grid that can be saved as a BAG (Bathymetric Attributed Grid) or used as a tool for filtering and rejecting all soundings that lie too far from this grid.

To do CUBE Editing, you first must have made the choice to Enable Cube Processing in the Create Dynamic Grid dialogueQimera Create Dynamic grid dialoguewhen you built the Dynamic grid; if you have not, create a new Dynamic grid and check Enable Cube Processing. Select the Dynamic grid in the Project Layers Dock and change your Depth Layer to CUBE. Change the colour By to Number of Hypothesis; you might find it helpful to edit the colourmap to clearly show areas with more then one hypothesis. Review the grid, looking for obvious outliers or areas with multiple hypotheses. Use the Select Area Mode

In the 3D Editor, check on the Hypothesis Display option (1). Review cells that have multiple hypotheses, comparing the available hypotheses to the soundings to see if the correct hypothesis was chosen (2). If an alternative hypothesis should have been chosen, use CUBE Editing mode (3) and the Select Mode 

Continue until all necessary hypotheses are updated, then go to the File menu and choose Save and Exit. The Dynamic grid will update, and the 3D Editor will close.

Continue until you have validated the entire CUBE grid. After you have finished, if your product is a BAG, you only need to export the BAG (see Step 9 - Export Products below). If your product is a clean set of sounding data, you will now want to use the CUBE grid to filter the soundings. The CUBE Filter Soundings option can be run on the entire selected Dynamic grid or on a selected area of that grid.

Static grids for Filter Check

You may find it useful to create a Shallow Biased Static Grid prior to filtering, to use a way of comparing the pre- and post- filter results. You can create a Static grid using the Create Static grid

Button.  

Select CUBE > Filter Soundings from the Dynamic grid menu.

Set the Filtering Method (1), Vertical range (2), and Scope (3) and then click Filter (4).

The CUBE filter will run, rejecting soundings outside of the threshold you set. The QPD files will update, as will any Dynamic grids that are utilizing the QPD files you just updated. Check your results. Note that the CUBE Depth Layer will show little or no change – check the results of the filter by comparing the Shallow Depth Layer of the Dynamic grid to the CUBE Layer of the Dynamic grid (they should now be pretty similar) or to a Shallow Biased Static grid you created prior to filtering.

Step 9 – Export Products

Once your processing and editing is complete, you can export products. Exports related to the Dynamic grid including soundings, https://qpssoftware.atlassian.net/wiki/spaces/qimera/pages/634597289, and Fledermaus SD (Snapshot as Static Grid) exports are located under the Dynamic Grid Menu.

If you Enabled CUBE when you built your Dynamic grid, additional options will be available under CUBE in the Dynamic grid Menu.

Any grid layer – Dynamic grid Depth Layers, Static grids, or Fledermaus DTM SD Objects – can be exported to third-party compatible grid formats using Export grid from the Layer Menu.

Finally, there are additional export options under the Source Menu for exporting processed point information and tracklines.

Step 10 – Additional Multibeam-Related Processing

Processing of multibeam backscatter is done using the FMGeocoder Toolbox (FMGT) module of the Fledermaus Suite. For information on migrating processed data from Qimera to FMGT, see How-to Migrate a Qimera Project to FMGT.

Multibeam water column data is processed in the FMMidwater module of the Fledermaus Suite. See the FMMidwater chapter of the Reference Manual for more information.

Step 11 – Grid Analysis

After processing, you may also choose to run grid analysis operations. Operations available in Qimera include Contouring and Grid Difference. These tools can be found under the Layer menu, and can be applied to Dynamic Grids, Static Grids, and loaded Fledermaus DTM SD objects.

If you are a Fledermaus user, additional analysis, export, and transfer options are available in the Fledermaus application. Opening your current QPS Project in Fledermaus will give you the ability to load all your project files into Fledermaus for further analysis.