Changes between Initial Version and Version 1 of DataFormat/LidarDelivery

Feb 24, 2012 10:13:52 AM (7 years ago)



  • DataFormat/LidarDelivery

    v1 v1  
     1= LiDAR Data Delivery Contents =
     3This page describes the file formats and delivery structure used in the LiDAR data deliveries.
     5== Delivery Structure ==
     7A standard delivery directory contains the following sub directories:
     9 * '''bin''' - Contains useful post-processing applications
     10  * [wiki:Processing/LidarNoisyPoints pt_cloud_filter] - Windows and Linux versions of software to remove classified points from ASCII files.
     11 * [#DEM dem] - Contains a Digital Elevation Model suitable for use with APL hyperspectral processing software.
     12 * [#PDFFILES doc] - Contains a copy of the most recent data quality report.
     13 * '''flightlines''' - Contains the processed LiDAR point cloud data.
     14  * [#LAS1.0FILES las1.0] - Contains LAS version 1.0 point data files.
     15  * [#LAS1.3FILES las1.3] - Contains LAS version 1.3 point data and waveform data files.
     16  * [#ASCIILIDARFILES ascii] - Contains ASCII point data files.
     17 * [#PDFFILES logsheet] - Contains a logsheet that gives a brief overview of the flown project
     18 * [#JPGFILES screenshots] - Contains JPEG files of level-3 processed data including mosaics.
     20=== Digital Elevation Model === #DEM
     22The format of the delivered Digital Elevation Model (DEM) is band Sequential (BSQ) ENVI format binary data. The projection is in WGS-84 latitude and longitude, with heights relative to the WGS-84 spheroid. There is an accompanying ASCII text header file containing the required information to read the binary data. In most cases, the LiDAR data will have been 'patched' with ASTER data. This will extend the coverage of the DEM which is often required for processing the hyperspectral data.
     25=== Screenshot images === #JPGFILES
     27The screenshots are supplied as JPEG images. This is a type of compressed image format that can be opened by most image viewers. The supplied screenshots include one of the DEM and one of the LiDAR intensity values. If the flight is in the UK and one where Ordnance Survey licensing allows, the intensity images will contain vector overlays to show the expected accuracy of the geocorrection.
     29=== Read-Me, Logsheet and Data quality report === #PDFFILES
     31The documents included with the delivery are in PDF. This is an open, platform independent standard for distribution of documentation, which allows graphical, text and tabular data to be included in the same file. Free viewers are available for displaying these documents.