Topic: bottom river line

[tournevase]

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  ?

[oschi]

You want something like that?

[tournevase]

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
 

[oschi]

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.

[tournevase]

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]

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 ?

[oschi]

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.

[tournevase]

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