To dump lat lon depth from a merged file:

Use -att to dump the attitude data. The output file will have following columns: datestring hour min sec dec.sec gps_time_in_sec lat lon heading roll pitch heave.

Dumping data from specified beam range. The output will be lat lon depth (with increasing beam number). By adding the -utm flag it will output Eastings and Northings. e.g. portside beams 20 to 45:

Dumping (green)lidar waveform info. The output parameters are continuously under construction, check the code.

The r4toASCII command is used to dump gridded (float)data. The example below uses a additional depth shift of -3.50.

Applying tides is done in two steps, binarize a tide file (1) and merge the tide file with the bathy (2).

but first.....
The ascii tide file needs to have the following format:

The program some how does'nt like tide values with time intervals larger than an hour. So you might have to preform an before interpolation.

1)

Binarize the file with:

2)

Merging with bathymetry

Later in the processing pipline when you use the weigh_grid function add the -check_tide option. It will then only do the job if you really executed (1) and (2).

If your not sure whether a line has been cleaned before:

check_cleaned -in the_surveyline.merged

Use the dumpFlags command if for some reason you want to re-unravel the data but don't feel like cleaning it again. First dump the flagged data and then after you unravel the raw data load them up again:

dumpFlags the_surveyline.merged

This creates a .flag_bk file. Then unravel the data again and load up the flags, make sure both files are in the same directory.

dumpFlags -load the_surveyline.merged

Creating a plot with the beamfootprints as a function of depth, speed and sonar type. (Not as fancy as in synSwath though...)

1) creat a beam footprint file:

makeFoot -reson_8101 -outfile 8101_foot

The program wil output the text file 8101_foot. It will look a bit like this:

RESON Seabat 8101
150 deg mode
0.200000 // shot interval
1 // 1=equi angular, -1= equi distance
101 // number of beams
1 // number of sectors
0 0.000000 // sector number

# angle width height offset_dirn
0 -75.000000 1.500000 1.500000 1.000000
1 -73.500000 1.500000 1.500000 1.000000
2 -72.000000 1.500000 1.500000 1.000000
......
......
......
......
......
......
98 72.000000 1.500000 1.500000 1.000000
99 73.500000 1.500000 1.500000 1.000000
100 75.000000 1.500000 1.500000 1.000000

2) make a plot file. Provide depth (m), speed (knt) boxsize and axis dimensions:

plotFoot -depth 20 -speed 10 -boxsize 100 -size 10 10 -infile 8101_foot

3) view the results:

viewmeta plot.meta

With the differ command you can calculate a difference DTM:

differ -first dtm_1.r4 -second dtm_2.r4 -out diff_dtm.r4

jview diff_dtm.r4

Dumping ascii nav data