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Metadata Identifier: gov.noaa.csc.maps:2002_WestC_m14

MD_DataIdentification

Count	Component	Title	Abstract
1		2002 NASA/USGS Airborne LiDAR Assessment of Coastal Erosion (ALACE) Project for California, Oregon, and Washington Coastlines	Laser beach mapping uses a pulsed laser ranging system mounted onboard an aircraft to measure ground elevation and coastal topography. The laser emits laser beams at high frequency and is directed downward at the earth's surface through a port opening in the bottom of the aircraft's fuselage. The laser system records the time difference between emission of the laser beam and the reception of the reflected laser signal in the aircraft. The aircraft travels over the beach at approximately 60 meters per second while surveying from the low water line to the landward base of the sand dunes.

SV_Identification

none found

CI_Citation

Count	Component	Title	Date	Citation Identifier
1		2002 NASA/USGS Airborne LiDAR Assessment of Coastal Erosion (ALACE) Project for California, Oregon, and Washington Coastlines
2		None

CI_Series

none found

CI_ResponsibleParty

Count	Component	Individual	Organization	Email	Role
1	NOAA CSC (originator)		DOC/NOAA/NOS/CSC > Coastal Services Center, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce	csc.info@noaa.gov	originator
1	NOAA CSC (publisher)		DOC/NOAA/NOS/CSC > Coastal Services Center, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce	csc.info@noaa.gov	publisher
1	NOAA CSC (pointOfContact)		DOC/NOAA/NOS/CSC > Coastal Services Center, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce	csc.info@noaa.gov	pointOfContact
1	NOAA CSC(distributor)		DOC/NOAA/NOS/CSC > Coastal Services Center, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce	csc.info@noaa.gov	distributor
1			DOI/USGS > United States Geological Survey, U.S. Department of the Interior		originator
1	Mike Sutherland(author)	Mike Sutherland	DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce	mike.sutherland@noaa.gov	author
1	Mike Sutherland	Mike Sutherland	DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce	mike.sutherland@noaa.gov	distributor
1			National Aeronautics and Space Administration (NASA)		originator
1		Pamela Grothe	DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce		processor

CI_OnlineResource

none found

MD_Identifier or RS_Identifier

Count	Component	Code
1		Ellipsoid in Meters

EX_Extent

			Bounding Box				Temporal Extent
Count	Component	Description	West	East	North	South	Start	End
1			-128.111	-119.611	48.389465	36.933602	2002-09-18	2002-10-03

EX_GeographicBoundingBox

Count	Component	West	East	North	South
1		-128.111	-119.611	48.389465	36.933602

EX_TemporalExtent

Count	Component	Start	End
1		2002-09-18	2002-10-03

MD_Format

Count	Component	Name	Version	specification
1		LAZ

MD_Medium

none found

MD_Constraints

Count	Component	Use Limitation
1	Lidar Use Limitation	These data depict the elevations at the time of the survey and are only accurate for that time. Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. Any conclusions drawn from analysis of this information are not the responsibility of NOAA or any of its partners. These data are NOT to be used for navigational purposes.

MD_ReferenceSystem

Count	Component	Code	Authority Title
1	Ellipsoid	Ellipsoid in Meters

MD_GridSpatialRepresentation

none found

MD_Georeferenceable or MI_Georeferenceable

none found

MD_Georectified or MI_Georectified

none found

MD_Dimension

none found

MD_CoverageDescription or MI_CoverageDescription

none found

MD_Band or MI_Band

none found

MI_RangeElementDescription

none found

MD_AggregateInformation

none found

LE_Source or LI_Source

none found

LE_ProcessStep or LI_ProcessStep

Count	DateTime	Description
1		The vertical values in this data set have been filtered through visual inspection to find abnormally high and abnormally low values. In addition, these data have been filtered using a spatial filtering program that identifies and discards outlier elevation measurements. This program reads each elevation measurement within a file and identifies "spatially close" points (i.e. those neighboring points within a fixed radius of the point). The mean and standard deviation is calculated using the elevations of these points. If the elevation difference from the mean of the point under consideration is more than 2 standard deviations and greater than a defined distance the point is discarded.
1	2004-08-01T00:00:00	The xyz coordinates of this data set were transformed from ITRF_2000 to ITRF_1994 using datum transformation parameters from the National Geodetic Surveys HTDP software.
1	2011-04-26T00:00:00	The NOAA National Geophysical Data Center (NGDC) received lidar data files via ftp transfer from the NOAA Coastal Services Center. The data are currently being served via NOAA CSC Digital Coast at http://www.csc.noaa.gov/digitalcoast/. The data can be used to re-populate the system. The data are archived in LAS or LAZ format. The LAS format is an industry standard for LiDAR data developed by the American Society of Photogrammetry and Remote Sensing (ASPRS); LAZ is a loseless compressed version of LAS developed by Martin Isenburg (http://www.laszip.org/). The data are exclusively in geographic coordinates (either NAD83 or ITRF94). The data are referenced vertically to the ellipsoid (either GRS80 or ITRF94), allowing for the ability to apply the most up to date geoid model when transforming to orthometric heights.

MI_Operation

none found

MI_Platform

none found

MI_Instrument

none found