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  batch_repair_header.bat

      run this batch script either by double click or in the
      command line to change the version of the LAS files. this
      tool will repair the header of all LAS files by setting
      the bounding box to the actual extend and by correcting
      other missing or wrong entries in the header.

                       questions or bugs: isenburg@cs.unc.edu

      created on March 13th, 2009 for geomatics-group.co.uk
              (c) copyright martin isenburg
  
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example usage:

>> batch_repair_header.bat data\test000.las

repairs the header of file 'data\test000.las'

>> batch_repair_header.bat data\*.las 1.5

repairs the header  of all '*.las' files in directory 'data\'

>> batch_repair_header.bat data\flight\flight*.las 1.1

repairs the header of all 'flight*.las' files in directory 'data\flight\'

>> batch_repair_header.bat 
>> input file (or wildcard): data\*.las

repairs the header of all '*.las' files in directory 'data\'


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under the hood the batch script uses the lasinfo.exe. you can
do the following with this tool:

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  LASinfo : simply prints the header contents and a short
            summary of the points. when there are differences
            between header info and point content they are
            reported as a warning.

            can also be used to modify entries in the header
            as described below

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example usage:

>> lasinfo lidar.las

reports all information 

>> lasinfo -o lidar_info.txt -i lidar.las

reports all information to a text file called lidar_info.txt

>> lasinfo -i lidar.las -no_variable

avoids reporting the contents of the variable length records

>> lasinfo -i lidar.las -nocheck

omits reading over all the points. only reports header information

>> lasinfo -i lidar.las -repair

if there are missing or wrong entries in the header they are corrected

>> lasinfo -i lidar.las -repair_boundingbox

reads all points, computes their bounding box, and updates it in the header

>> lasinfo -i lidar.las -file_creation 8 2007

sets the file creation day/year in the header to 8/2007

>> lasinfo -i lidar.las -system_identifier "hello world!"

copies the first 31 characters of the string into the system_identifier field of the header 

>> lasinfo -i lidar.las -version 1.1 -quiet

changes the version of the lidar file to be 1.1 while suppressing all control output

>> lasinfo -i lidar.las -generating_software "this is a test (-:"

copies the first 31 characters of the string into the generating_software field of the header 

for more info:

C:\lastools\bin>lasinfo -h
usage:
lasinfo lidar.las
lasinfo -no_variable lidar.las
lasinfo -no_variable -nocheck lidar.las
lasinfo -i lidar.las -o lidar_info.txt
lasinfo -i lidar.las -repair
lasinfo -i lidar.las -repair_bounding_box -file_creation 8 2007
lasinfo -i lidar.las -system_identifier "hello world!" -generating_software "this is a test (-:"

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if you find bugs let me (isenburg@cs.unc.edu) know.