Re: [OpenSeaMap-develop] Lowrance support

[Jens K. <cle...@go...>]

Hi
That would be me and Bernhard.
I propose to upload them to testdepth.osm.org and I can pull them from
there.

Best Regards
Jens


2013/10/10 fusionstream <fus...@gm...>

>  Hi there,
>
> Who would I pass sl2 files to?
>
> I'm afraid these aren't very high quality files but maybe the structure
> might be useful.
>
> Cheers,
> Shawn.
>
>
> On 23/9/2013 1:11 AM, fusionstream wrote:
>
> Hi Jens,
>
> I'll be sure to pass along my sl2 file when I get on the water.
>
> Ideally, I'd like to keep the nmea hardware logger out of the loop for
> now. That way if it can work, the hardware loggers can be saved for others.
> Of course having an understandable reference could help. But still. :)
>
> Cheers,
> Shawn.
>
> On 22/9/2013 11:55 PM, Jens Kübler wrote:
>
>  *Hi, *
> *
> *
> *Depth Logging*
>
>> My device can log depth data in the .sl2 format which appears to be
>> binary data interspersed with some strings. Some research on the net seems
>> to suggest that the "binary data" is actually bit bashed flags.
>>
>> In any case, Lowrance's Sonar Viewer can convert the sl2 file into a CSV
>> file. Having not been out on the water yet, the internet suggests that the
>> position data in the csv file is not actual latitudes and longitudes but
>> some other coordinate system, possibly a relative coordinate system.
>>
>> If anyone has any information on this it would be great to share.
>>
> We took a first look at decoding SL2 and found
> https://github.com/capeisti/SonarWidget.
>
>  However we only have a single file and did not decode it properly.
> Bernhard was about to look at the file format.
> If you have data available both in record and explanation it should be
> much easier to decode it.
>
>
>
>>
>> For the record, the Elite 5 HDI can also output NMEA strings via one of
>> its ports but I'm first attempting to do everything without any other
>> hardware.
>>
> If you do not want to wait until decoding is finished NMEA0183 is an
> option as we are able to process it.
>
>  Regards
> Jens
>
>
>
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