How to convert AIS signal into ship trajectory images in MATLAB?

I want to know that how to convert AIS signal into ship trajectory images i MATLAB? I have searched a lot but couldn't find any proper and accurate information regarding this. kindly plzz guide me.

Thanks in advance

Answer 1

[surya venu]

Hi,

Here is the offical MathWorks documentation on Ship Tracking using AIS Signals:

https://www.mathworks.com/help/comm/ug/ship-tracking-using-ais-signals.html

If you like to decode the AIS signals, make use of this AIS Decoder from File Exchange:

https://www.mathworks.com/matlabcentral/fileexchange/57600-ais-decoder

Here are the steps to create trajectory images:

Trajectory Creation:

• Loop through AIS Data: Iterate through each AIS message in your data.
• Create Trajectory Points: For each message, create a data point containing the extracted longitude, latitude, and timestamp.
• Consider Time Intervals: You might want to consider the time interval between AIS messages. If positions are not received continuously, you can use interpolation techniques to create a smoother trajectory.

Image Generation:

• Define Image Canvas: Set up a canvas image representing the geographical area you want to visualize. This could be a pre-defined map image or a blank image with appropriate scaling for latitude and longitude.
• Plot Trajectory Points: Use MATLAB's plotting functions like "plot" or "scatter" to plot the extracted trajectory points on the image canvas. You can color-code the points based on timestamps or ship attributes for better visualization.

Hope it helps.