Generate a Side-Scan Mosaic

Use this when

You have a recording with Side Imaging data and want to build a top-down map of the bottom.

Before you start

• The recording must have Side Imaging port and starboard channels. If those channels are missing, the Mosaic tab shows a "Side-scan mosaic needs SI channels" message and the Generate Mosaic button is disabled.
• A Pro or higher plan is required to access the Mosaic tab.

Generate a mosaic

1. Open a recording in the viewer.
2. Click the Mosaic tab at the top of the viewer to switch to the Mosaic view. A GPS track appears on the map as soon as the recording loads.
3. Pick a resolution using the 0.5 m, 0.25 m, or 0.1 m buttons in the bottom control bar. The default is 0.25 m (standard). See Pick draft, standard, or high quality for guidance.
4. Click Generate Mosaic.
5. A progress overlay appears showing "Generating mosaic" with a progress bar and a phase label. Wait for it to finish.
6. When generation completes, the mosaic image appears on the map, georeferenced to the GPS track.

What you should see

The map fills with a grayscale image of the bottom draped over the satellite or street map tiles. The status bar at the bottom shows the grid size, the actual meters-per-pixel used, how many pings contributed, and how long generation took.

If the recording had any quality issues, a yellow warning banner appears above the map. Read the message — it describes which pings were skipped and why. Click the X on the banner to dismiss it.

Adjust brightness and contrast

After generation you can refine the image without regenerating:

• Drag the Bright slider left or right to shift overall brightness.
• Drag the Contrast slider to increase or reduce contrast.

These controls apply instantly and do not require a new generation run.

Export the mosaic

1. Click Export in the bottom control bar.
2. Choose KMZ (Google Earth) or GeoTIFF (GIS) from the menu.
3. Pick a save location. The file is named after the recording.

If it does not work

• "Side-scan mosaic needs SI channels" — the loaded recording has no Side Imaging data. Confirm the recording came from a Humminbird unit with Side Imaging and that both port and starboard channels appear in the viewer.
• "No side-scan pings available to mosaic" — the SI channels parsed as empty. Try reloading the recording.
• "Not enough GPS extent to build a mosaic. Make sure the recording has usable GPS data." — the recording has Side Imaging data but no usable GPS track. Check the Map tab; if no track appears, the file lacks GPS data.
• Error banner with another message — the text describes the specific failure. Note the message and contact support if it recurs.