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TOPIC: SideScan mosaic

SideScan mosaic 3 years 1 week ago #9502

  • Januzik
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Hallo i heve problem in create mapp mosiac - My device Lowrance HDS Gen 3 - File SL3

I heve update reefmaster to version 2.
End i cen't finde where is mode SRC - with lived only flat structure with out deep ( water) ? ?

If you heve any toturials with cen show me what is posibble real do ..... ( end a don;t talk about demo move )
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SideScan mosaic 3 years 1 week ago #9503

  • Matt
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This could be a problem with depths within the track, which prevent SRC from being applied correctly. Could you share this track please and send a link to This email address is being protected from spambots. You need JavaScript enabled to view it. ?
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SideScan mosaic 3 years 1 week ago #9505

  • Januzik
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I send - my track heve 30 Mb - so i selcted difrens smaller .....
Or you heve any serwer where i cen load .....
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SideScan mosaic 3 years 1 week ago #9506

  • Matt
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You can use a sharing service such as WeTransfer and send the link to our email. It would be good to see the track in your original post, if possible. Also zip the track to reduce size.
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SideScan mosaic 3 years 1 week ago #9507

  • Januzik
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SideScan mosaic 3 years 1 week ago #9508

  • Matt
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Thanks - that worked.
The issue you have here is that you do not have good depths for the majority of your track. Depth is required when calculating slant range correction, and when the depth is wrong you will see the results in your OP.

Here is an image of your track - you can see that at some point during the track, the sonar has locked on to "clutter" at the start of the return and is using this for depth for the remainder of the track (~0.5m instead of 20-30m). In fact, your downscan and primary channels are not even recording the full depth because it looks like automatic depth-range is on, and is locked to the top of the water column. There is not much you can do with this track at the moment, but take care to ensure that depths are being logged correctly when you are recording data - they are very important!

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SideScan mosaic 3 years 1 week ago #9509

  • Januzik
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Do you see the meaning of deepening manually? ?
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SideScan mosaic 3 years 1 week ago #9510

  • Januzik
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ok I check new track . . Thx for help now i know what do .....
Do you have any pictures of Lowrance HDS Gen 3? Would I like to know if the final effect is different? (Maybe my sonar settings are bad)?
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SideScan mosaic 3 years 6 days ago #9511

  • skinnee
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Some guidelines on settings here for recording gofreemarine.com/wp-content/uploads/2016...-Start-Guide_web.pdf

Recommended Settings
• Save the log le to the MEMORY CARD
• Recommended Speeds
- 10 MPH (8.69 knots or 16.09 kph) or slower for Vegetation/Bottom Hardness Maps
- 20 MPH (17.38 knots or 32.19 kph) or slower for Contours Maps
• Maximum Speed = 20 mph (17.38 knots or 32.19 kph). No data will be displayed for the portions of the trip over 20 MPH.
• File Size - Files under 1 gig are recommended. You can do multiple les and merge them as needed.
• Frequency 200KHz, High Chirp or Log All Channels (Mandatory)
• For more detailed instruction please refer to the Insight Genesis User
Guide
Recording Track on the Water
• Minimum spacing should be based on size of water body:

Size of the Body of Water
Minimum Spacing
<5 Acres
10-20 Acres
5 Meters / 15 Feet
10 Meters / 30 Feet
15 Meters / 45 Feet 40 Meters / 120 Feet
• To assist track spacing and view progress, use the Lowrance, chartplotter Chart to view the path while on the water. Ensure you have your trail/track enabled.
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SideScan mosaic 2 years 2 months ago #10284

  • MarsArtis
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skinnee wrote:
Some guidelines on settings here for recording gofreemarine.com/wp-content/uploads/2016...-Start-Guide_web.pdf.

Thx for pointing to this guide.

I've two more questions:
1-Which is the best way to map close to a submerging Clif? The area I want to map has shores with sand/stones that are connected to cliffs with lot of slopes, channels and rocks.

2 is good to make criss-cross recordings? If so can they be recorded on different daylogs and then post processed all together in RM?
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