root/trunk/doc/lasmerge.txt
| Revision 813, 2.0 kB (checked in by mloskot, 6 weeks ago) | |
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lasmerge: merge multiple LAS files into a single file
| Author: | Martin Isenburg |
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| Contact: | isenburg@cs.unc.edu |
| Revision: | $Revision$ |
| Date: | $Date$ |
lasmerge reads multiple LIDAR data files in the LAS format and merges them into a single file. The filenames can either be provided one by one or in form of a text file.
All the header information of the first file provided is used including variable and user_defined headers. but some records are updated by integrating the corresponding information from other headers. these are:
- number_of_point_records
- number_of_points_by_return[5]
- max_x, min_x, max_y, min_y, max_z, and min_z
In addition x_scale_factor, y_scale_factor, z_scale_factor may need to be increased to accommodate a possibly larger bounding box. The user can also set those in the command line with
-scale 0.01 or -scale_xyz 0.01 0.01 0.001
Similarly a new offset can be specified
-xyz_offset 63025000 483450000 0
1 Usage
$ lasmerge -i in1.las -i in2.las -i in3.las -o out.las
merge the three inX.las files into one out.las file.
$ lasmerge -i las_file_list.txt -o out.las
merges all LAS files listed in the text file into one out.las file
$ lasmerge -i las_file_list.txt -o out.las -scale 0.01 -verbose
merges the file and stores the LIDAR points with 0.01 accuracy in x, y, and z and prints out control information.
$ lasmerge -i las_file_list.txt -o out.las -scale_xyz 0.01 0.01 0.001
same but with a different accuracy for z.
1.1 Help
C:\lastools\bin>lasmerge -h usage: lasmerge -i lasfiles.txt -o out.las lasmerge -i file1.las -i file2.las -i file3.las -o out.las lasmerge -i file1.las -i file2.las -olas > out.las lasmerge -i lasfiles.txt -scale 0.01 -verbose -o out.las lasmerge -h
