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libLAS - LAS 1.0/1.1/1.2 ASPRS LiDAR data translation toolset
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==============================================================================
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libLAS is a C/C++ library for reading and writing ASPRS LAS versions 1.0, 1.1 and 1.2
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data. The LAS format is a sequential binary format used to store data from sensors
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and as intermediate processing storage by some `LiDAR`_-related applications.
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libLAS is available under the terms of the `BSD License`_. It builds on work
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by `Martin Isenburg and Jonathan Shewchuk`_ of the University of North
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Carolina in their `LAStools`_ project by replacing the base C++ library
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with new development and porting Martin's tools this new code.
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libLAS' initial development was supported by the `IGSB`_ of the Iowa DNR
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for use in its state-wide `LIDAR`_ project.
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The 1.2.0 version of libLAS can be downloaded from http://liblas.org/wiki/1.2.0
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Older releases may be obtained from http://liblas.org/wiki/Releases
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Windows binaries of libLAS are provided in two forms. The easiest form is
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to obtain `OSGeo4W`_ and select the libLAS package to install. Alternatively,
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you can download a Windows package with full spatial reference support from
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the release page. GDAL support is only provided with the `OSGeo4W`_ package, however.
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Linux, Mac OS X, and Solaris binaries are not provided. The source code
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uses the standard GNU autotools/automake stack for compilation and installation.
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`LAStools`_ / libLAS Command-line Utilities
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Software Development with libLAS
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* `FOSS4G 2008`_ presentation that provides a basic overview of the design and philosophy of libLAS
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* `ASPRS Workshop Demo`_ by Jason Woolard of NOAA describing how to use libLAS with Python
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* `Tutorials`_ - tutorials on using libLAS from C++, Python and .NET/Mono languages
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* `LAS C API`_- doxygen docs that describe the libLAS C API
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* `dotnetLibLAS API`_ - docs for the .NET API
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* `LAS Doxygen Docs`_ - doxygen docs of the entire C/C++ API
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* `LAS Format Elements`_ - comparison of elements of LAS Format 1.0 and 1.1
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* `Software`_ - a list of geospatial software with reading and writing capabilities of LAS Format
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* `Resources`_ - a list of general LiDAR/LAS resources
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LAS Format Specifications
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The LAS Format Standard is maintained by `ASPRS Standards Committee`_. LAS
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format standard documents are available in PDF format:
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* `LAS 1.2 Format Standard`_ (2008-09-02)
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* `LAS 1.1 Format Standard`_ (2005-05-07)
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* `LAS 1.0 Format Standard`_ (2003-05-09)
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libLAS is available under the terms of the `BSD License`_.
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See `License`_ for a copy.
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The FAQ is available from http://liblas.org/wiki/FAQ
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libLAS is open source software. You can embed it in your own applications
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(and even resell it) as long as you follow the crediting restriction of the BSD
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license. See `License`_ for more detail.
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libLAS has C, C++, .NET, and Python APIs.
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Spatial Reference System Support
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Linked against a 1.2.5+ version of `libgeotiff`_, you can set and get the spatial reference
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systems of LAS files using simple `proj.4`_ coordinate system definitions.
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Alternatively, with libLAS 1.2, you can link against `GDAL`_ to be able to
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manipulate spatial references using WKT.
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Simple Variable Length Record Abstraction
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libLAS provides a sensible abstraction for working with variable length records (VLR)
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in LAS files, and it transparently manages the VLRs related to spatial referencing
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Command-line Utilities
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libLAS provides ports of the `LAStools`_ utilities by Martin Isenburg for doing
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things like translating from one version of the LAS format to another, inspecting
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header information, and translating LAS data to and from text.
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Cross-platform operation
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libLAS is known to work on all editions of Microsoft Visual C++ 7.1+ (Windows) and
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GCC 4.1+ (Mac OS X and Linux) platforms on both big- and little-endian architectures.
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The libLAS development team are:
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Special thanks to `Martin Isenburg and Jonathan Shewchuk`_ for their
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`LAStools`_ pioneering implementation of the ASPRS LAS standard that made
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development of the libLAS library possible.
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The SVN repository URL is available at http://liblas.org/svn
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svn checkout http://liblas.org/svn/trunk/
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Information about Trac
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* `Trac <http://trac.edgewall.org/>`_ Open Source Project
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* `TracGuide <http://trac.edgewall.org/wiki/TracGuide>`_ - Built-in Documentation
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* `TracFaq <http://trac.edgewall.org/wiki/TracFaq>`_ - Frequently Asked Questions
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* `TracSupport <http://liblas.org/wiki/TracSupport>`_ - Trac Support
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* `reStructuredText Support in Trac <http://bitten.edgewall.org/wiki/WikiRestructuredText>`_
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Find the libLAS developers on IRC on #liblas at `Freenode`_.
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* liblas-devel - http://lists.osgeo.org/mailman/listinfo/liblas-devel
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* liblas-commits - http://lists.osgeo.org/mailman/listinfo/liblas-commits
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.. _`LIDAR`: http://en.wikipedia.org/wiki/LIDAR
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.. _`IGSB`: http://www.igsb.uiowa.edu/
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.. _`Martin Isenburg`: http://www.cs.unc.edu/~isenburg/
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.. _`LAStools`: http://www.cs.unc.edu/~isenburg/lastools/
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.. _`Martin Isenburg and Jonathan Shewchuk`: http://www.cs.unc.edu/~isenburg/lastools/
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.. _`LAS Format`: http://www.lasformat.org/
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.. _`LAS 1.2 Format Standard`: http://liblas.org/raw-attachment/wiki/WikiStart/asprs_las_format_v12.pdf
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.. _`LAS 1.1 Format Standard`: http://liblas.org/raw-attachment/wiki/WikiStart/asprs_las_format_v11.pdf
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.. _`LAS 1.0 Format Standard`: http://liblas.org/raw-attachment/wiki/WikiStart/asprs_las_format_v10.pdf
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.. _`ASPRS Standards Committee`: http://www.asprs.org/society/committees/standards/lidar_exchange_format.html
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.. _`Howard Butler`: http://hobu.biz
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.. _`Mateusz Loskot`: http://mateusz.loskot.net
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.. _`Phil Vachon`: http://www.geoscan.info
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.. _`Frank Warmerdam`: http://home.gdal.org/warmerda/
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.. _`BSD license`: http://www.opensource.org/licenses/bsd-license.php
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.. _`LAS Format Elements`: http://liblas.org/wiki/LASElements
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.. _`Tutorials`: http://liblas.org/wiki/Tutorial
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.. _`Software`: http://liblas.org/wiki/Software
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.. _`Resources`: http://liblas.org/wiki/Resources
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.. _`License`: http://liblas.org/wiki/License
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.. _`las2las`: http://liblas.org/browser/trunk/doc/las2las.txt
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.. _`las2txt`: http://liblas.org/browser/trunk/doc/las2txt.txt
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.. _`lasinfo`: http://liblas.org/browser/trunk/doc/lasinfo.txt
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.. _`lasmerge`: http://liblas.org/browser/trunk/doc/lasmerge.txt
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.. _`txt2las`: http://liblas.org/browser/trunk/doc/txt2las.txt
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.. _`las2ogr`: http://liblas.org/browser/trunk/doc/las2ogr.txt
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.. _`Freenode`: http://freenode.net
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.. _`Library Design`: http://liblas.org/wiki/LibraryDesign
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.. _`FOSS4G 2008`: http://liblas.org/raw-attachment/wiki/WikiStart/liblas_foss4g_2008.pdf
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.. _`LAS C API`: http://liblas.org/doxygen/liblas_8h.html
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.. _`LAS Doxygen Docs`: http://liblas.org/doxygen/
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.. _`How To Release libLAS`: http://liblas.org/wiki/HowToRelease
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.. _`libgeotiff`: http://www.remotesensing.org/geotiff/geotiff.html
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.. _`7/28/2008`: http://lists.maptools.org/pipermail/geotiff/2008-July/000501.html
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.. _`proj.4`: http://proj.maptools.org/
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.. _`GDAL`: http://www.gdal.org
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.. _`OSGeo4W`: http://wiki.osgeo.org/wiki/OSGeo_Win32_Installer
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.. _`dotnetLibLAS API`: http://liblas.org/wiki/dotnetapi
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.. _`FOSS4G 2008`: http://liblas.org/raw-attachment/wiki/WikiStart/liblas_foss4g_2008.pdf
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.. _`ASPRS Workshop Demo`: http://liblas.org/raw-attachment/wiki/WikiStart/ASPRS-Workshop-NOAA-Demo.pdf
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