Author Topic: bottom river line  (Read 1716 times)

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Offline tournevase

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bottom river line
« on: January 13, 2022, 05:39:39 AM »
hello

i'll try to explain with my laborious english  :-[

when the hummin operate, it records gps data, 2D, SI and down imaging
after the SI, one of my interests is the bottom river line of each record

i want to get it only like a line : depth function of the boat way  (x y diagram) even if the way is not straigth
may be like a picture and, climax, like a .xls file

one possibility is to save in humviewer with a .csv file giving lat / long / depth
a line can be drawn with these data but it depends of the gps acquisition quality

more interesting for me : the bottom lines are intrinsically on 2D, SI and down imaging displays among many others pixels (reverberation on 2D for example) but how to extract it ?
of course it is possible to redraw manualy on the images but  :(

does somebody know how to do this ?

note : i have autochart pro where the line can be displayed but how extract it  ?
Tournevase


Offline oschi

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Re: bottom river line
« Reply #1 on: January 13, 2022, 07:57:09 PM »
You want something like that?

Offline tournevase

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Re: bottom river line
« Reply #2 on: January 14, 2022, 08:06:03 AM »
no oschi, i want a 2d xy diagram where y is the depth and x the distance between the starting point and any point of the way of the boat
like BB' here
 

Tournevase

Offline oschi

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Re: bottom river line
« Reply #3 on: January 14, 2022, 05:01:35 PM »
Ok. Nothing easier than that.

Save your track. It contains lat, lon and depth. You have to calculate the distance between two following trackpoints out of lat, lon data. That's all.

Offline tournevase

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Re: bottom river line
« Reply #4 on: January 15, 2022, 03:07:08 PM »
i agree with you oschi

but the problem is that some gps  recordings are bad and can't be used  :'(

in this case, supposing that the way was straight and the speed constant i could use the distance between the start point and the last valids, given by the gps and divide that distance by the (number of depth recordings - 1) to draw the line   :)
Tournevase

Offline tournevase

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Re: bottom river line
« Reply #5 on: February 19, 2022, 06:14:58 PM »
hello
now i want to extract lat long and depth of some records
my gps data are ok and can be loaded in autochart pro
but .... i don't know how, can't be loaded in humviewer able to extract   lat long and depth
how could i do ?
Tournevase

Offline oschi

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Re: bottom river line
« Reply #6 on: March 24, 2022, 09:18:30 AM »
HumViewer has an error and struggles with the DI beam B004 file.
Simply rename the extension.
If you want to display B004 rename it to B001. That's the 2D beam.

Offline tournevase

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Re: bottom river line
« Reply #7 on: March 24, 2022, 01:16:59 PM »
hello oshi
in my records i have B001 , 2, 3, 4
if i want to viex in humviewer for example i need to remove B004.son from the folder
so there is realy a problem with B004
Tournevase


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