Changes between Version 5 and Version 6 of Processing/Splitting

Timestamp:

Nov 19, 2014, 4:35:37 PM (10 years ago)

Author:

tec

Comment:

--

Processing/Splitting

@@ -118 +118 @@
 
 {{{
-split_las.py (-d INPUTDIR | -f INPUTFILE) [-o OVERLAP] outputdir fraction
+split_las.py (-d INPUTDIR | -i INPUTFILE | -l INPUTLIST... ) -o OUTPUTDIR (--time time | --speed SPEED --distance DISTANCE )
 }}}
 
-This can be run on either a single file or a directory of las files. 
+'''This is still slightly experimental (more so for FW) so inspect output files thoroughly'''
+This can be run on either a single file, a space separated list or a directory of las files. You can specify the number of seconds for overlap using `--time` (default is 1s aka 65ish metres), you can also specify the overlap in metres if you specify the plane speed too. If you dont want overlap use `--time 0`. This script will split __full waveform__ and discrete LAS files.
 
-Use -o to specify the number of seconds of overlap, this can be used with the airplanes ground speed to calculate overlap. For instance 7 seconds 140 knots will result in an overlap of 504 metres (7 seconds * 72 m/s). Give the script a fraction for the number of lines to divide the line into, I usually just give it 3.
+`lassplit` Is a C++ program which will split LAS files based on a GPS time range.
+{{{
+lassplit -l las_input_file -o las_output_file -s gps_start_time -e gps_end_time
+}}}
 
 === Full Waveform ===
 
-Full wave form data cannot use the script above. Unfortunately you will need to produce this using alspp and its fence feature. 
+Left this in as it is still useful.
 
 It is worthwhile using the script above to divide a discrete line then using the x/y coordinates from each section for your division. This will give you a consistent split across the waveform data. If you have variable pitch/roll you will likely have to process each line seperately.