50017
2011 USACE NCMP Topobathy Lidar: Gulf Coast (AL, LA, MS)
se2011_ncmp_almsla_m2610_metadata
Data Set
Published / External
49401
Lidar - partner (no harvest)
Project
Completed
2011
2013-12
These files contain classified topographic lidar data as unclassified valid topographic data (1), valid topographic data classified as ground (2), Invalid topographic data classified as lowpoints (7). Classes 1 and 2 are defined in accordance with the American Society for Photogrammetry and Remote Sensing (ASPRS) classification standards. These data were collected by the Compact Hydrographic Airborne Rapid Total Survey (CHARTS) system along the coast of Mississippi. CHARTS integrates topographic and bathymetric lidar sensors, a digital camera and a hyperspectral imager on a single remote sensing platform for use in coastal mapping and charting activities. Data coverage generally extends along the coastline from the waterline inland 500 meters (topography) and offshore 1,000 meters or to laser extinction (bathymetry). Native lidar data is not generally in a format accessible to most Geographic Information Systems (GIS). Specialized in-house and commercial software packages are used to process the native lidar data into 3-dimensional positions that can be imported into GIS software for visualization and further analysis. The 3-D position data are sub-divided into a series of LAS files, each covering approximately 5 kilometers of shoreline. The format of the file is LAS version 1.2. Data for Louisiana was collected on May 31st, 2011. Data for Alabama was collected from June 2nd, 2011 to June 4th, 2011. Data for Mississippi was collected from June 1st, 2011 to June 3rd, 2011.
In addition to these lidar point data, the bare earth Digital Elevation Models (DEM) created from the lidar point data are also available. These data are available for custom download at the link provided in the URL section of this metadata record.
These data were collected as a part of the NCMP to depict the elevations above the water in the Mississippi, Louisiana, and Alabama coastal zone.
10661
In areas of dense vegetation the points classified as ground might be incorrectly classified due to the inability of the laser to penetrate the canopy and reach the bare ground.
Theme
ISO 19115 Topic Category
elevation
Theme
Compact Hydrographic Airborne Rapid Total Survey (CHARTS)
Theme
IWG-OCM
Theme
National Coastal Mapping Program (NCMP)
Theme
U.S. Army Corps of Engineers (USACE)
Office for Coastal Management
Charleston
SC
Data Set
As Needed
las
LiDAR points in LAZ format
none
Any conclusions drawn from the analysis of this information are not the responsibility of JALBTCX, USACE, NOAA, the Office for Coastal Management or its partners.
Data Steward
2013-12
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Distributor
2013-12
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Metadata Contact
2013-12
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Point of Contact
2013-12
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Ground Condition
-89.151305
-88.074195
30.282304
29.760477
Range
2011-05-31
2011-06-04
Yes
Unclassified
This data can be obtained on-line at the following URL:https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=2610;
None
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 applicationswithout a full awareness of its limitations.These data depict the heights at the time of the survey and are only accurate for that time. Acknowledgement of the Joint Airborne Lidar Bathymetry Technical Center of eXpertise (JALBTCX)would be appreciated in any publications or derived products.
2013
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=2610
2013-12
Organization
NOAA Office for Coastal Management
Customized Download
Create custom data files by choosing data area, product type, map projection, file format, datum, etc.
Zip
Zip
2013
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2610/index.html
2013-12
Organization
NOAA Office for Coastal Management
Bulk Download
Simple download of data files.
LAZ
LAS/LAZ - LASer
Zip
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2610/supplemental/se2011_ncmp_almsla_m2610.kmz
Browse Graphic
Browse Graphic
kmz
This graphic shows the lidar coverage for barrier islands along the coasts of Alabama, Mississippi and Louisiana.
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9433/details/9433
Custom DEM Download
Online Resource
Zip
Link to custom download, from the Data Access Viewer (DAV), the raster Digital Elevation Model (DEM) data that were created from this lidar data set.
2016-05-23
Date that the source FGDC record was last modified.
2017-11-14
Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details.
2018-02-08
Partial upload of Positional Accuracy fields only.
2018-03-13
Partial upload to move data access links to Distribution Info.
These data are not attributed. | Quantitative Value: N/A | Quantitative Test Explanation: These data are not attributed.
The data positions were obtained using post processed KGPS methods. The horizontal accuracy of the data is better than +/- 0.75 m.; Quantitative Value: 0.75 meters, Test that produced the value: RMSEz @ 95% Confidence. Units in meters.
The data positions were obtained using post processed KGPS methods. The vertical accuracy of the data is better than +/- 0.20 m.; Quantitative Value: 0.20 meters, Test that produced the value: RMSEz @ 95% Confidence. Units in meters.
This data set covers the spatial extent of bathymetric and topographic lidar data obtained during this survey.
Differences between a DEM created from the lidar data representing bare ground and the ground truth data is unbiased and within +/- 20 cm (RMSE) in flat terrain and within +/-30 cm (RMSE) in hilly terrain.
The USACE collected, processed, and provided the data to the NOAA Office for Coastal Management (OCM). OCM received the data and processed it to be available for custom download from the Data Access Viewer (DAV) and for bulk download from https.
Lidar data from USACE
Organization
USACE NCMP
Originator
1
These data were collected using the CHARTS system. It is owned by the Naval Oceanographic Office and operated through contract. The system collects topographic lidar data at 10 kHz, bathymetric lidar data at 1 kHz and RGBimagery at 1Hz. A CASI-1500 hyperspectral line scanner is integrated with the system as well. Aircraft position, velocity and acceleration information are collected through a combination of Novatel and POS A/V 410 equipment.All raw data streams are transferred to the office for downloading and processing in SHOALS GCS software. Aircraft position data are processed using POSPac software and the results are combined with the lidar data to produce3-D positions for each lidar shot. Upon inspection and QA/QC in the software packages Fledermaus and PFM_ABE, anomalous data are flagged as invalid. PFM_ABE's charts2las module then converts all valid data from ellipsoid toorthometric heights based on the NGS' GEOID03 model and exports topographic and bathymetric data as a series of LAS files, one file per flight line. The format of the file is LAS version 1.2. Data are classified as 0(valid topographic data), 21 (valid topographic data acquired with the bathymetric sensor), 27 (invalid topographic and bathymetric data), 29 (valid bathymetric data).
2011-11-07T00:00:00
2
The flightline LAS files are imported into GeoCue V7.0.3.5, which is a geospatial workflow production and management software tool employed by JALBTCX to perform and monitor production of data products. Upon import into GeoCue,the flightline LAS files are divided into a series of boxes, each of which are 1500 meters in length and width. A customized classification macro, built upon the TerraScan V11 module within Microstation V8i, classifies validtopographic data as ground points (2) and unclassified points (1). Upon completion the macro, the classification results undergo quality control and any misclassified points are manually edited. In areas of dense vegetation thebare earth ground points might be incorrectly classified due to the inability of the laser to penetrate the canopy and reach the bare ground. In these areas, JALBTCX defaults to the algorithms ground surface instead of manuallyreclassifying those points. The final classification results are comprised of individual lidar points with classifications of valid ground (2), valid unclassified (1), and invalid low points (7). They are partitioned into aseries of 5km delivery boxes, one Classified LAS file per box. The format of the file is LAS version 1.2. Data are classified as 1 (valid non-ground topographic data), 2 (valid ground topographic data), 7 ( invalid topographiclow points), 21 (valid topographic data acquired with the bathymetric sensor), 27 (invalid topographic and bathymetric data), 29 (valid bathymetric data). Horizontal positions, provided in decimal degrees of latitude and longitude, are referenced to the North American Datum of 1983 (NAD83). Vertical positions are referenced to the NAD83 ellipsoid and provided in meters. The National Geodetic Survey's (NGS) GEOID03 model is used to transform the vertical positions from ellipsoid to orthometric heights referenced to the North American Vertical Datum of 1988 (NAVD88).
2011-11-08T00:00:00
3
The NOAA Office for Coastal Management (OCM) received the topographic las files on hard drive from USACE. The files contained lidar elevation and intensity measurements. The data were received in Geographic, NAD83 coordinates and were vertically referenced to NAVD88 using the Geoid03 model. The vertical units of the data were meters. OCM performed the following processing for data storage and Digital Coast provisioning purposes:
1. The topographic las files were converted to laz v1.2 using LAStools' laszip software.
2. The GPS Week Time information was converted to Adjusted Standard GPS Time using LAStools' las2las software.
3. The topographic laz files were converted from orthometric (NAVD88) heights to ellipsoidal heights using Geoid03.
2013-12-24T00:00:00
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Lidar data from USACE
4
Points with classes 14 and 17 (approximately 50 total points) were reclassed to class 1 (unclassified).
2021-06-23T00:00:00
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
65899
Data Set
2011 USACE NCMP Topobathy Lidar DEM: Gulf Coast (AL, LA, MS)
Cross Reference
gov.noaa.nmfs.inport:50017
Anne Ball
2017-11-15T15:23:46
SysAdmin InPortAdmin
2023-10-17T16:12:16
2022-03-16
OCM Partners
OCMP
1002
Public
No
2022-03-16
1 Year
2023-03-16