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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
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<refentry id='lasmerge'>
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<refentrytitle>lasmerge</refentrytitle>
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<manvolnum>1</manvolnum>
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<refname>lasmerge</refname>
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<refpurpose>merge multiple LAS files into a single file</refpurpose>
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<refsynopsisdiv id='synopsis'>
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<command>lasmerge</command>
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<arg choice='plain'><option>-h</option></arg>
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<arg choice='plain' rep='repeat'><option>-i</option> <replaceable>arg</replaceable></arg>
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<arg choice='opt'><option>-scale</option> <replaceable>0.01</replaceable></arg>
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<arg choice='opt'><option>-verbose</option></arg>
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<arg choice='opt'><option>-olas</option></arg>
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<arg choice='opt'><option>-o</option> <replaceable>arg</replaceable></arg>
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<refsect1 id='description'>
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<title>DESCRIPTION</title>
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<command>lasmerge</command> reads multiple LIDAR data files in the
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LAS format and merges them into a single file.
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The filenames can either be provided one by one or in form of a text file.
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All the header information of the first file provided is used including
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variable and user_defined headers.
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But some records are updated by integrating the corresponding information
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<para>number_of_point_records</para>
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<para>number_of_points_by_return[5]</para>
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<para>max_x, min_x, max_y, min_y, max_z, and min_z</para>
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In addition x_scale_factor, y_scale_factor, z_scale_factor may need to be
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increased to accommodate a possibly larger bounding box.
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The user can also set those in the command line with
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<option>-scale 0.01</option> or <option>-scale_xyz 0.01 0.01 0.001</option>
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Similarly a new offset can be specified
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<option>-xyz_offset 63025000 483450000 0</option>
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<refsect1 id='options'>
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<title>OPTIONS</title>
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<term><option>-h</option></term>
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<term><option>-i</option> <replaceable>arg</replaceable></term>
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Can be specified multiple times.
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<term><option>-scale</option> <replaceable>0.01</replaceable></term>
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<term><option>-verbose</option></term>
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<term><option>-olas</option></term>
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<term><option>-o</option> <replaceable>arg</replaceable></term>
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<refsect1 id='example'>
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<title>EXAMPLE</title>
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$ lasmerge -i in1.las -i in2.las -i in3.las -o out.las
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merge the three inX.las files into one out.las file.
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$ lasmerge -i las_file_list.txt -o out.las
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merges all LAS files listed in the text file into one out.las file
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$ lasmerge -i las_file_list.txt -o out.las -scale 0.01 -verbose
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merges the file and stores the LIDAR points with 0.01 accuracy in x, y,
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and z and prints out control information.
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$ lasmerge -i las_file_list.txt -o out.las -scale_xyz 0.01 0.01 0.001
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same but with a different accuracy for z.