1. Operation of recording files of multiple formats with the same procedure, various outputs 
2. Quality control by corrections 
3. Keeping sounding accuracy by extracting error data 
4. Significant reduction of noise removal work time by CUBE
5. Visualization by Gridding and Contouring
   
6. Various Charting Style
7. Batch creation of cross-sectional images from cross-sectional lines
8. Exportable data to CAD, GIS, etc. 
   
9. Depth selection extension
10. Improvement of survey line planning tool
11. Other convenient functions 
12. i-Construction Compliant (ICT implementation guidelines, MLIT, 2020) ICT  
    
13. Quality evaluation tool for hydrographic survey results QUEST (OPTION)
14. Automatic Processing
    

■ Input of Multibeam bathymetric data

□ Support of various multi-beam recording file format
MD supports various recording file format of multi-beam acoustic sounder. By converting the recording data to Marine Discovery format, it is possible to process and manage the recording data in a unified procedure.

It corresponds to ACF, ALL, KMALL, GSF, HSX, Imagenex, LOG, XSE, MB41, NM, S7K, XTF, etc. as the data format of multi-beam acoustic sounding machine.

■ Analysis and correction of Multibeam bathymetric data

□ Edit wake track
Failure positioning may be recorded in the wake data at the time of investigation due to incompleteness of GNSS reception, etc. In addition, the data of the rapid ship turning part is generally inferior in quality and it is not suitable for use. You can draw such defective data on the plan and delete it by mouse operation.

 
          The sample of Track

□ Various corrections to sounding data
MD provides various correction functions to improve the sounding data quality. There is also a function that sets parameters and corrects enormous data collectively.

Added removing outlier function from pitch and roll data by moving average with time series. 

• Sound speed correction
• Sonar bias correction
• Sensor offset correction
• Sensor latency compensation
• Tide correction
• Dynamic draft correction       

               
  The image of sound velocity correction                    The example of Bias

           The image of offset

• Removal function of bad positioning data
• IHO S-44 compliant filter
• Pre-filter
• Manual removal function
• Efficient noise removal function

□ Automatic noise reduction
MD provides automatic noise reduction functions below.

• Pre-filter with threshold values of swath angle or beam number
• CUBE filter
• Plane estimation filter
• Depth filter
• Yaw, or Pitch and Roll filter 

 
                       Median sounding filter

□ Noise Removal for point cloud data

• Point Cloud Files(.las, .las2)
• Ping Files(.ping)
• CSV Files(.csv, .xyz)

CUBE filter compares the water depth at the grid obtained by CUBE and known depth points and removes automatically the water depth points where depth difference are more than the threshold. It has world widely reported that the working time of noise removal were dramatically shortened as compared with the conventional noise removal operations by utilizing CUBE filter noise rejection.

The following images shows the comparisons of the grid before removing noise and the grid obtained by the CUBE function in MarineDiscovery. The grid obtained by CUBE becomes totally smooth and a bathymetric image with high reproducibility. 

□ Embedding noise extracting data
If you notice some mistake of correction after noise extracting work have been finished, doing over again the job is very heavy. To evade this inconvenience, MD provides the function of embedding noise extracting data in the rightly corrected file.

□ Efficient data processing
MD can organize recording data for each project, so you can efficiently process and manage data. Data can be efficiently processed by collectively loading files, activating a noise elimination application from a track diagram, automatic noise reduction filter function using the CUBE algorithm, and others.

             Cross Check of the results

□ Management of Inspection and Survey Quality  ICT  
Management of Inspection and Survey Quality can be performed by comparing the depth of the seafloor in an area where two parallel bathymetry lines and two orthogonal bathymetry lines overlap 100%.

Example: Water depth difference of 10 cm or more is indicated in red

□ Sounding density  ICT  
From the created grid file, MD can output the fraction (achievement rate) of the grid which has 3 points or more.

□ Quality control by visualizing
MD provides visualizing functions that can overlap grids and soundings in order to evaluate grids' quality. If grids' quality is lower, MD can feedback the output to the previous process.

Added function for 3D displaying survey planning line and file of given point.

Also by including QCtools provided from HydrOffice, the function of extracting spike noise by using Gaussian curve or Laplacian was available. 

To clarify the number of the depth points involved in the grid  

To clarify the depth difference between the grid and the water depth point  

 
To verify quantitatively the depth difference between the grid and the water depth point  

■ Output of Multibeam bathymetric data

• Gridding

Grid data are generated only in the grid points where water depth data are obtained. Interpolation is also possible. As each grid data value, shallowest value or average value can be set.

• Contouring

Contour data is calculated from the grid file or random grid file. The depth contour is calculated dynamically from a triangle (TIN). The depth contour is not include part of no grid data. The grid size can be changed dynamically for smooth contours.

You can smooth contours to deep side. Roll a circle with radius r from the deep side along the contour line, delete the vertices where the circle does not fit, and fill it with arcs instead.

□ Various file output
Based on the grid, contour, or track data which are made from recording data, the MD can output the water depth map, the sound pressure map, the inclination amount map, the difference chart, the three dimensional diagram, the cross section, etc. as various file formats such as PDF and Postscript. DXF, Shapefile, etc. In addition, on the background of the plan view, MD can place drawing information, index map, etc. freely. When converting the grid to GeoTIFF, MD can add color and shade, making it easier to grasp the terrain. MD can also output the bird's eye view to 3D PDF.  

  (→ a 3D PDF Sample [a 3D image of Wreck])

Added function of converting LandXML to TIN.

Output images of MarineDiscovery  

On the basis of the created grid and the section line, cross-sectional images are automatically created. Display range, scale, color, etc. of a cross-sectional image can be configured.

□ Creating 3D bathymetric model (TIN model)  ICT  
A TIN model at each stage (design, construction, or formulation management) can be created.

□ Creating Bird's Eye View  ICT  
Three-dimensional display of the undersea ground topography, soil quality, and N value of boring survey information at each stage (present condition, finished shape, before construction, at completion) can be displayed and created.

□ Inclination calculation
MD provides the function of Inclination calculation that calculates inclination from grids and displays it with clear. 

        3D synthesis charting(Tilt orientation and inclination amount)

□ Survey Calculator

• Longitude Latitude ⇔ XY Coordinate
• Coordinate calculator
• Sound velocity display in seawater
• Horizontal distance, elevation calculation 

■ Importable Data Formats

• Sounding data

•  Information from several sensors