[Liblas-commits] laszip: some lossless blurb
liblas-commits at liblas.org
liblas-commits at liblas.org
Sun Feb 27 10:25:11 EST 2011
details: http://hg.liblas.orglaszip/rev/da150320e593
changeset: 184:da150320e593
user: isenburg
date: Sun Feb 27 07:24:56 2011 -0800
description:
some lossless blurb
diffstat:
docs/source/index.rst | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diffs (20 lines):
diff -r d9d74e016745 -r da150320e593 docs/source/index.rst
--- a/docs/source/index.rst Sun Feb 20 09:18:17 2011 -0800
+++ b/docs/source/index.rst Sun Feb 27 07:24:56 2011 -0800
@@ -47,6 +47,16 @@
BSD-licensed `libLAS`_ and the LGPL-licensed `LASlib`_ can take
advantage of LASzip to read and write compressed data.
+LASzip is completely lossless. It compresses bulky LAS files into compact LAZ
+files that are only 10-20 percent of the original size, accurately preserving
+every single bit. For example, compressing and decompressing the LAS file
+lidar.las with `laszip.exe`_ as shown below results in lidar_copy.las that
+is bit-identical to lidar.las. However, the small size of lidar.laz makes it
+much easier to store, copy, transmit, or archive large amounts of LIDAR.
+
+* laszip lidar.las lidar.laz
+* laszip lidar.laz lidar_copy.las
+
LASzip compression can be many times smaller and many times faster than
`bz2`_, `gzip`_, and `rar`_ because it takes advantage of knowing what the
different bytes in a LAS file represent. For example, the ``x`` and ``y``
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