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.. _osgeo4w_install:
******************************************************************************
Installing libLAS using OSGeo4W
******************************************************************************
:Author: Howard Butler
:Contact: hobu.inc at gmail dot com
:Date: 2/17/2011
This document describes how to install libLAS and its related :ref:`utilities <utilities>`
using `OSGeo4W`_. `OSGeo4W`_ is a collection of Windows packages that uses the `Cygwin`_
installer to manage package dependencies. libLAS in its fully-featured form
requires a number of dependencies, and these are all available via the OSGeo4W installer.
1) Obtain the `OSGeo4W Installer`_. It is an executable that will run and
automatically download and install selected packages.
.. note::
OSGeo4W does not currently provide any options to install in any other
locations besides ``C:\osgeo4w``.
.. `OSGeo4W Installer`: http://download.osgeo.org/osgeo4w/osgeo4w-setup.exe
2) Choose "Advanced Install".
.. note::
libLAS is not part of any default package grouping, and it must be
installed individually.
.. figure:: ./images/osgeo4w-advanced-install.png
:alt: Choosing the "Advanced" OSGeo4W install
3) Select liblas from the "Commandline_Utilities" dropdown
.. figure:: ./images/osgeo4w-select-liblas.png
:alt: Selecting libLAS to install from the "Advanced" list tree
4) *Optional*: Select liblas-python from the "Libs" dropdown
5) Run the ``OSGeo4W Shell`` from Start-Programs-OSGeo4W
6) Execute the ``liblas`` command to set environment variables necessary to
support full libLAS operations.
.. note::
libLAS needs a number of environment variables set to do its business,
most notably the ones related to `GDAL`_ and `Proj.4`_ for
reprojection and coordinate system description.
.. figure:: ./images/osgeo4w-run-liblas-shell.png
:alt: Running the libLAS subshell from OSGeo4W
7) Test ``lasinfo`` with your own data
.. figure:: ./images/osgeo4w-lasinfo-output.png
:alt: Running lasinfo
.. _`OSGeo4W Installer`: http://download.osgeo.org/osgeo4w/osgeo4w-setup.exe
.. _`OSGeo4W`: http://trac.osgeo.org/osgeo4w/
.. _`Cygwin`: http://www.cygwin.com/
.. _`GDAL`: http://www.gdal.org
.. _`Proj.4`: http://trac.osgeo.org/proj/
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